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INPUT AND OUTPUT PROPERTIES IN ANGULAR 9 addRecipe emits the value submitted by the user. Make sure to import Output and EventEmitter from @angular/core. now add the following to the child component template recipe.component.html -. Add Recipe . in the child template, we have an input text box ADDING STATIC WEBPAGES TO ERPNEXT OR FRAPPE Creating static webpages for a ERPNext installation. Clear cache and reload the page, and Login button shouldn’t show up anymore.. You can read about updating context variables in our earlier post.. Currently there isn’t a way to disable the Login button using Website Settings and you need to do it using website_context. Allowing it from Website Settings would be a good idea, and we will PYTHON AND DJANGO DEVELOPMENT ON WINDOWS WITH WSL Port forwarding. When you run manage.py runserver, which starts on port 8000, inside of WSL, the same servers are also available in windows on same port.. This mapping is automatic, no port forwarding is explicitly required. So if you access localhost:8000 in windows, this is what you see.. Beautiful. Sharing code between Windows andLinux
DJANGO ADMIN COOKBOOK Django Admin Cookbook - How to do things with Django admin.¶ This is a book about doing things with Django admin. It takes the form of about forty questions DJANGO ADMIN COOKBOOK Django Admin Cookbook Release 2.0 Agiliq May 22, 2018 Contents 1 Django Admin Cookbook - How to do things with Django admin.1 2 Text and Design 2 3 Calculated fields 10 1. HOW TO CHANGE ‘DJANGO ADMINISTRATION’ TEXT? By default Django admin shows ‘Django administration’. You have been asked to replace this with ‘UMSRA Administration’. The text is at these pages: 1.1. Login, Listview and Changeview Page ¶. By default it looks like this and is set to “Django administration”. site_header can be set to change this. 1.2. 6. HOW TO SELECT SOME FIELDS ONLY IN A QUERYSET? In such situations, we can query only desired fields. Django provides two ways to do this. values and values_list methods on queryset. only_method. Say, we want to get first_name and last_name of all the users whose name starts with R. You do not want the fetch the otherfields to
2. HOW TO EXPORT CSV FROM DJANGO ADMIN? 2. How to export CSV from Django admin?¶ You have been asked to add ability to export Hero and Villain from the admin. There are a number of third party apps which allow doing this, but its quite easy without adding another dependency. 4. HOW TO REMOVE DEFAULT APPS FROM DJANGO ADMIN? 4. How to remove default apps from Django admin? ¶. Django will include django.contrib.auth in INSTALLED_APPS , which means User and Groups models are included in admin automatically. If you want to remove it, you will have to unregister them. After HOW WEB PAGES GET STYLED IN FRAPPE/ERPNEXT If you want to understand creating webpages in detail and how to customise them, then read our earlier post. Navigate to the desk and under desk navigate to Tools > Website > Web Page > New. Let’s add a ‘What we do’ page. Add the following things in the relevantfields.
INPUT AND OUTPUT PROPERTIES IN ANGULAR 9 addRecipe emits the value submitted by the user. Make sure to import Output and EventEmitter from @angular/core. now add the following to the child component template recipe.component.html -. Add Recipe . in the child template, we have an input text box ADDING STATIC WEBPAGES TO ERPNEXT OR FRAPPE Creating static webpages for a ERPNext installation. Clear cache and reload the page, and Login button shouldn’t show up anymore.. You can read about updating context variables in our earlier post.. Currently there isn’t a way to disable the Login button using Website Settings and you need to do it using website_context. Allowing it from Website Settings would be a good idea, and we will PYTHON AND DJANGO DEVELOPMENT ON WINDOWS WITH WSL Port forwarding. When you run manage.py runserver, which starts on port 8000, inside of WSL, the same servers are also available in windows on same port.. This mapping is automatic, no port forwarding is explicitly required. So if you access localhost:8000 in windows, this is what you see.. Beautiful. Sharing code between Windows andLinux
DJANGO ADMIN COOKBOOK Django Admin Cookbook - How to do things with Django admin.¶ This is a book about doing things with Django admin. It takes the form of about forty questions DJANGO ADMIN COOKBOOK Django Admin Cookbook Release 2.0 Agiliq May 22, 2018 Contents 1 Django Admin Cookbook - How to do things with Django admin.1 2 Text and Design 2 3 Calculated fields 10 1. HOW TO CHANGE ‘DJANGO ADMINISTRATION’ TEXT? By default Django admin shows ‘Django administration’. You have been asked to replace this with ‘UMSRA Administration’. The text is at these pages: 1.1. Login, Listview and Changeview Page ¶. By default it looks like this and is set to “Django administration”. site_header can be set to change this. 1.2. 6. HOW TO SELECT SOME FIELDS ONLY IN A QUERYSET? In such situations, we can query only desired fields. Django provides two ways to do this. values and values_list methods on queryset. only_method. Say, we want to get first_name and last_name of all the users whose name starts with R. You do not want the fetch the otherfields to
2. HOW TO EXPORT CSV FROM DJANGO ADMIN? 2. How to export CSV from Django admin?¶ You have been asked to add ability to export Hero and Villain from the admin. There are a number of third party apps which allow doing this, but its quite easy without adding another dependency. 4. HOW TO REMOVE DEFAULT APPS FROM DJANGO ADMIN? 4. How to remove default apps from Django admin? ¶. Django will include django.contrib.auth in INSTALLED_APPS , which means User and Groups models are included in admin automatically. If you want to remove it, you will have to unregister them. After RAILS + GRAPHQL AND REACT In frontend, we’ll be using the following modules. graphql. apollo-boost. react-polls (For showing polls and pseudo voting :P) react-apollo. Just install the packages using the command below. yarn add graphql apollo-boost react-polls react-apollo --save. Lets go toour
FREQUENT CONFUSIONS OF NEW FRAPPE/ERPNEXT DEVELOPERS Frappe is the framework using which Erpnext is built. You can think of Frappe as a framework and Erpnext is an application built using Frappe. You could build another application called Erpnext-advanced using Frappe. Erpnext is a set of modules. Different modules in erpnext are stock, crm, restaurant, healthcare, education and severalothers.
WHEN AND HOW TO USE DJANGO CREATEVIEW When and how to use Django CreateView. When to use CreateView? Django provides several class based generic views to accomplish common tasks. One among them is CreateView. CreateView should be used when you need a form on the page and need to do a db insertion on submission of avalid form.
FINDING KEYWORDS USING PYTHON The code is longer than it needs to be make every step as clear as possible. def find_keyword (test_string = 'Hacker news is a good site while Techcrunch not so much'): key_file = open ('keywords2.txt') data = key_file.read () words = data.split () word_freq = {} for word in words: if word in word_freq: word_freq +=1 else: word_freq [word PRODUCER-CONSUMER PROBLEM IN PYTHON Producer can acquire the lock because lock was released by consumer. Producer puts data in queue and calls notify () on the condition instance. Once notify () call is made on condition, consumer wakes up. But waking up doesn’t mean it starts executing. notify () does notrelease the lock.
USING UBUNTU CLOUD IMAGES IN KVM The qemu-img command creates a new_vm.img image with qcow2 format using the ubuntu-12.04-server-cloudimg-amd64.img as the backing image.. Right click on the connection in virt-manager and select New and provide a name for the new virtual machine and select the Import existing disk image option.HOW TO USE JSTREE
Next we need to select the div where the tree will be displayed. We use jquery selector for it. On the selected element we call jstree () and need to pass the required values. Here, we will be using json data to populate our tree. ####So, the fields needed by jstree () in such case are: json_data - This is an object. 6. HOW TO SELECT SOME FIELDS ONLY IN A QUERYSET? In such situations, we can query only desired fields. Django provides two ways to do this. values and values_list methods on queryset. only_method. Say, we want to get first_name and last_name of all the users whose name starts with R. You do not want the fetch the otherfields to
DJANGO ADMIN COOKBOOK Django Admin Cookbook Release 2.0 Agiliq May 22, 2018 Contents 1 Django Admin Cookbook - How to do things with Django admin.1 2 Text and Design 2 3 Calculated fields 10 2. HOW TO EXPORT CSV FROM DJANGO ADMIN? 2. How to export CSV from Django admin?¶ You have been asked to add ability to export Hero and Villain from the admin. There are a number of third party apps which allow doing this, but its quite easy without adding another dependency. HOW WEB PAGES GET STYLED IN FRAPPE/ERPNEXT If you want to understand creating webpages in detail and how to customise them, then read our earlier post. Navigate to the desk and under desk navigate to Tools > Website > Web Page > New. Let’s add a ‘What we do’ page. Add the following things in the relevantfields.
WHEN AND HOW TO USE DJANGO FORMVIEW When to use FormView? Django provides several class based generic views to accomplish common tasks. One among them is FormView. FormView should be used when you need a form on the page and want to perform certain action when a valid form is submitted. eg: Having a contact us form and sending an email on form submission.. CreateView would probably be a better choice if you want to insert a DJANGO ADMIN COOKBOOK Django Admin Cookbook - How to do things with Django admin.¶ This is a book about doing things with Django admin. It takes the form of about forty questions HOW SCRIPT ORDERING WORKS IN AN ANGULAR APPSEE MORE ON AGILIQ.COM WHEN AND HOW TO USE DJANGO CREATEVIEW When and how to use Django CreateView. When to use CreateView? Django provides several class based generic views to accomplish common tasks. One among them is CreateView. CreateView should be used when you need a form on the page and need to do a db insertion on submission of avalid form.
1. HOW TO CHANGE ‘DJANGO ADMINISTRATION’ TEXT? By default Django admin shows ‘Django administration’. You have been asked to replace this with ‘UMSRA Administration’. The text is at these pages: 1.1. Login, Listview and Changeview Page ¶. By default it looks like this and is set to “Django administration”. site_header can be set to change this. 1.2. FINDING KEYWORDS USING PYTHON The code is longer than it needs to be make every step as clear as possible. def find_keyword (test_string = 'Hacker news is a good site while Techcrunch not so much'): key_file = open ('keywords2.txt') data = key_file.read () words = data.split () word_freq = {} for word in words: if word in word_freq: word_freq +=1 else: word_freq [word 14. HOW TO USE Q OBJECTS FOR COMPLEX QUERIES? 14. How to use Q objects for complex queries? ¶. In previous chapters we used Q objects for OR and AND and NOT operations. Q objects provides you complete control over the where clause of the query. If you want to OR your conditions. >>> from django.db.models import Q >>> queryset = User.objects.filter ( Q (first_name__startswith='R') | Q 6. HOW TO SELECT SOME FIELDS ONLY IN A QUERYSET? In such situations, we can query only desired fields. Django provides two ways to do this. values and values_list methods on queryset. only_method. Say, we want to get first_name and last_name of all the users whose name starts with R. You do not want the fetch the otherfields to
13. HOW TO FIND DISTINCT FIELD VALUES FROM QUERYSET How to find distinct field values from queryset? ¶. You want to find users whose names have not been repeated. You can do this like this. distinct = User.objects.values( 'first_name' ).annotate( name_count=Count('first_name') ).filter(name_count=1) records = User.objects.filter(first_name__in=) This is HOW WEB PAGES GET STYLED IN FRAPPE/ERPNEXT If you want to understand creating webpages in detail and how to customise them, then read our earlier post. Navigate to the desk and under desk navigate to Tools > Website > Web Page > New. Let’s add a ‘What we do’ page. Add the following things in the relevantfields.
WHEN AND HOW TO USE DJANGO FORMVIEW When to use FormView? Django provides several class based generic views to accomplish common tasks. One among them is FormView. FormView should be used when you need a form on the page and want to perform certain action when a valid form is submitted. eg: Having a contact us form and sending an email on form submission.. CreateView would probably be a better choice if you want to insert a DJANGO ADMIN COOKBOOK Django Admin Cookbook - How to do things with Django admin.¶ This is a book about doing things with Django admin. It takes the form of about forty questions HOW SCRIPT ORDERING WORKS IN AN ANGULAR APPSEE MORE ON AGILIQ.COM WHEN AND HOW TO USE DJANGO CREATEVIEW When and how to use Django CreateView. When to use CreateView? Django provides several class based generic views to accomplish common tasks. One among them is CreateView. CreateView should be used when you need a form on the page and need to do a db insertion on submission of avalid form.
1. HOW TO CHANGE ‘DJANGO ADMINISTRATION’ TEXT? By default Django admin shows ‘Django administration’. You have been asked to replace this with ‘UMSRA Administration’. The text is at these pages: 1.1. Login, Listview and Changeview Page ¶. By default it looks like this and is set to “Django administration”. site_header can be set to change this. 1.2. FINDING KEYWORDS USING PYTHON The code is longer than it needs to be make every step as clear as possible. def find_keyword (test_string = 'Hacker news is a good site while Techcrunch not so much'): key_file = open ('keywords2.txt') data = key_file.read () words = data.split () word_freq = {} for word in words: if word in word_freq: word_freq +=1 else: word_freq [word 14. HOW TO USE Q OBJECTS FOR COMPLEX QUERIES? 14. How to use Q objects for complex queries? ¶. In previous chapters we used Q objects for OR and AND and NOT operations. Q objects provides you complete control over the where clause of the query. If you want to OR your conditions. >>> from django.db.models import Q >>> queryset = User.objects.filter ( Q (first_name__startswith='R') | Q 6. HOW TO SELECT SOME FIELDS ONLY IN A QUERYSET? In such situations, we can query only desired fields. Django provides two ways to do this. values and values_list methods on queryset. only_method. Say, we want to get first_name and last_name of all the users whose name starts with R. You do not want the fetch the otherfields to
13. HOW TO FIND DISTINCT FIELD VALUES FROM QUERYSET How to find distinct field values from queryset? ¶. You want to find users whose names have not been repeated. You can do this like this. distinct = User.objects.values( 'first_name' ).annotate( name_count=Count('first_name') ).filter(name_count=1) records = User.objects.filter(first_name__in=) This is PYTHON AND DJANGO DEVELOPMENT ON WINDOWS WITH WSL Port forwarding. When you run manage.py runserver, which starts on port 8000, inside of WSL, the same servers are also available in windows on same port.. This mapping is automatic, no port forwarding is explicitly required. So if you access localhost:8000 in windows, this is what you see.. Beautiful. Sharing code between Windows andLinux
PRODUCER-CONSUMER PROBLEM IN PYTHON Producer can acquire the lock because lock was released by consumer. Producer puts data in queue and calls notify () on the condition instance. Once notify () call is made on condition, consumer wakes up. But waking up doesn’t mean it starts executing. notify () does notrelease the lock.
GETTING STARTED WITH CELERY AND REDIS With celery. The main component of a celery enabled program or a celery setup is the celery worker.. In our web app signup example, celery worker would do the job of sending the emails. In our FB example, celery worker would do the job of fetching the different urls. Similary in our celery_blog.py example, celery worker would do the job of fetching the urls. 14. HOW TO USE Q OBJECTS FOR COMPLEX QUERIES? 14. How to use Q objects for complex queries? ¶. In previous chapters we used Q objects for OR and AND and NOT operations. Q objects provides you complete control over the where clause of the query. If you want to OR your conditions. >>> from django.db.models import Q >>> queryset = User.objects.filter ( Q (first_name__startswith='R') | Q LINTERS AND FORMATTERS pycodestyle¶. Pycodestyle (Formerly PEP8) is the official linter tool to check the python code against the style conventions of PEP8 python.. To install it: pip install pycodestyle. Let us take a small example script to test pycodestyle. We will create a test script file test_script.py and use it 6. HOW TO SELECT SOME FIELDS ONLY IN A QUERYSET? In such situations, we can query only desired fields. Django provides two ways to do this. values and values_list methods on queryset. only_method. Say, we want to get first_name and last_name of all the users whose name starts with R. You do not want the fetch the otherfields to
1. HOW TO SHOW IMAGE FROM IMAGEFIELD IN DJANGO ADMIN 1. How to show image from Imagefield in Django admin. ¶. In your Hero model, you have an image field.: headshot = models.ImageField(null=True, blank=True, upload_to="hero_headshots/") By default it shows up like this: You have been asked to change it to that the actual image also shows up on the change page. You can do itlikethis:
1. HOW TO GET DJANGO ADMIN URLS FOR SPECIFIC OBJECTS 1. How to get Django admin urls for specific objects?¶ You have a children column displaying the names of each heroes’ children. You have been asked to link each children to the change page. 13. HOW TO FIND DISTINCT FIELD VALUES FROM QUERYSET How to find distinct field values from queryset? ¶. You want to find users whose names have not been repeated. You can do this like this. distinct = User.objects.values( 'first_name' ).annotate( name_count=Count('first_name') ).filter(name_count=1) records = User.objects.filter(first_name__in=) This is 2. HOW TO EXPORT CSV FROM DJANGO ADMIN? 2. How to export CSV from Django admin?¶ You have been asked to add ability to export Hero and Villain from the admin. There are a number of third party apps which allow doing this, but its quite easy without adding another dependency. HOW WEB PAGES GET STYLED IN FRAPPE/ERPNEXT If you want to understand creating webpages in detail and how to customise them, then read our earlier post. Navigate to the desk and under desk navigate to Tools > Website > Web Page > New. Let’s add a ‘What we do’ page. Add the following things in the relevantfields.
WHEN AND HOW TO USE DJANGO FORMVIEW When to use FormView? Django provides several class based generic views to accomplish common tasks. One among them is FormView. FormView should be used when you need a form on the page and want to perform certain action when a valid form is submitted. eg: Having a contact us form and sending an email on form submission.. CreateView would probably be a better choice if you want to insert a DJANGO ADMIN COOKBOOK Django Admin Cookbook - How to do things with Django admin.¶ This is a book about doing things with Django admin. It takes the form of about forty questions HOW SCRIPT ORDERING WORKS IN AN ANGULAR APPSEE MORE ON AGILIQ.COM WHEN AND HOW TO USE DJANGO CREATEVIEW When and how to use Django CreateView. When to use CreateView? Django provides several class based generic views to accomplish common tasks. One among them is CreateView. CreateView should be used when you need a form on the page and need to do a db insertion on submission of avalid form.
1. HOW TO CHANGE ‘DJANGO ADMINISTRATION’ TEXT? By default Django admin shows ‘Django administration’. You have been asked to replace this with ‘UMSRA Administration’. The text is at these pages: 1.1. Login, Listview and Changeview Page ¶. By default it looks like this and is set to “Django administration”. site_header can be set to change this. 1.2. FINDING KEYWORDS USING PYTHON The code is longer than it needs to be make every step as clear as possible. def find_keyword (test_string = 'Hacker news is a good site while Techcrunch not so much'): key_file = open ('keywords2.txt') data = key_file.read () words = data.split () word_freq = {} for word in words: if word in word_freq: word_freq +=1 else: word_freq [word 14. HOW TO USE Q OBJECTS FOR COMPLEX QUERIES? 14. How to use Q objects for complex queries? ¶. In previous chapters we used Q objects for OR and AND and NOT operations. Q objects provides you complete control over the where clause of the query. If you want to OR your conditions. >>> from django.db.models import Q >>> queryset = User.objects.filter ( Q (first_name__startswith='R') | Q 6. HOW TO SELECT SOME FIELDS ONLY IN A QUERYSET? In such situations, we can query only desired fields. Django provides two ways to do this. values and values_list methods on queryset. only_method. Say, we want to get first_name and last_name of all the users whose name starts with R. You do not want the fetch the otherfields to
13. HOW TO FIND DISTINCT FIELD VALUES FROM QUERYSET How to find distinct field values from queryset? ¶. You want to find users whose names have not been repeated. You can do this like this. distinct = User.objects.values( 'first_name' ).annotate( name_count=Count('first_name') ).filter(name_count=1) records = User.objects.filter(first_name__in=) This is HOW WEB PAGES GET STYLED IN FRAPPE/ERPNEXT If you want to understand creating webpages in detail and how to customise them, then read our earlier post. Navigate to the desk and under desk navigate to Tools > Website > Web Page > New. Let’s add a ‘What we do’ page. Add the following things in the relevantfields.
WHEN AND HOW TO USE DJANGO FORMVIEW When to use FormView? Django provides several class based generic views to accomplish common tasks. One among them is FormView. FormView should be used when you need a form on the page and want to perform certain action when a valid form is submitted. eg: Having a contact us form and sending an email on form submission.. CreateView would probably be a better choice if you want to insert a DJANGO ADMIN COOKBOOK Django Admin Cookbook - How to do things with Django admin.¶ This is a book about doing things with Django admin. It takes the form of about forty questions HOW SCRIPT ORDERING WORKS IN AN ANGULAR APPSEE MORE ON AGILIQ.COM WHEN AND HOW TO USE DJANGO CREATEVIEW When and how to use Django CreateView. When to use CreateView? Django provides several class based generic views to accomplish common tasks. One among them is CreateView. CreateView should be used when you need a form on the page and need to do a db insertion on submission of avalid form.
1. HOW TO CHANGE ‘DJANGO ADMINISTRATION’ TEXT? By default Django admin shows ‘Django administration’. You have been asked to replace this with ‘UMSRA Administration’. The text is at these pages: 1.1. Login, Listview and Changeview Page ¶. By default it looks like this and is set to “Django administration”. site_header can be set to change this. 1.2. FINDING KEYWORDS USING PYTHON The code is longer than it needs to be make every step as clear as possible. def find_keyword (test_string = 'Hacker news is a good site while Techcrunch not so much'): key_file = open ('keywords2.txt') data = key_file.read () words = data.split () word_freq = {} for word in words: if word in word_freq: word_freq +=1 else: word_freq [word 14. HOW TO USE Q OBJECTS FOR COMPLEX QUERIES? 14. How to use Q objects for complex queries? ¶. In previous chapters we used Q objects for OR and AND and NOT operations. Q objects provides you complete control over the where clause of the query. If you want to OR your conditions. >>> from django.db.models import Q >>> queryset = User.objects.filter ( Q (first_name__startswith='R') | Q 6. HOW TO SELECT SOME FIELDS ONLY IN A QUERYSET? In such situations, we can query only desired fields. Django provides two ways to do this. values and values_list methods on queryset. only_method. Say, we want to get first_name and last_name of all the users whose name starts with R. You do not want the fetch the otherfields to
13. HOW TO FIND DISTINCT FIELD VALUES FROM QUERYSET How to find distinct field values from queryset? ¶. You want to find users whose names have not been repeated. You can do this like this. distinct = User.objects.values( 'first_name' ).annotate( name_count=Count('first_name') ).filter(name_count=1) records = User.objects.filter(first_name__in=) This is PYTHON AND DJANGO DEVELOPMENT ON WINDOWS WITH WSL Port forwarding. When you run manage.py runserver, which starts on port 8000, inside of WSL, the same servers are also available in windows on same port.. This mapping is automatic, no port forwarding is explicitly required. So if you access localhost:8000 in windows, this is what you see.. Beautiful. Sharing code between Windows andLinux
DJANGO REST FRAMEWORK LISTCREATEAPIVIEW Make the api calls for create and list again and your responses should remain unchanged. In GET calls, the default implementation of ListCreateAPIView.get uses queryset attribute of the class to find the objects which should be serialized and uses serializer_class attribute for serializing.. In POST calls, the default implementation of ListCreateAPIView.post creates an instance of self PRODUCER-CONSUMER PROBLEM IN PYTHON Producer can acquire the lock because lock was released by consumer. Producer puts data in queue and calls notify () on the condition instance. Once notify () call is made on condition, consumer wakes up. But waking up doesn’t mean it starts executing. notify () does notrelease the lock.
LINTERS AND FORMATTERS pycodestyle¶. Pycodestyle (Formerly PEP8) is the official linter tool to check the python code against the style conventions of PEP8 python.. To install it: pip install pycodestyle. Let us take a small example script to test pycodestyle. We will create a test script file test_script.py and use it 6. HOW TO SELECT SOME FIELDS ONLY IN A QUERYSET? In such situations, we can query only desired fields. Django provides two ways to do this. values and values_list methods on queryset. only_method. Say, we want to get first_name and last_name of all the users whose name starts with R. You do not want the fetch the otherfields to
13. HOW TO FIND DISTINCT FIELD VALUES FROM QUERYSET How to find distinct field values from queryset? ¶. You want to find users whose names have not been repeated. You can do this like this. distinct = User.objects.values( 'first_name' ).annotate( name_count=Count('first_name') ).filter(name_count=1) records = User.objects.filter(first_name__in=) This is 2. HOW TO MODEL ONE TO MANY RELATIONSHIPS? In a one-to-many relationship, the parent is not required to have child records; therefore, the one-to-many relationship allows zero child records, a single child record or multiple child records. To define a many-to-one relationship, use ForeignKey .: class Article(models.Model): headline = models.CharField(max_length=100)pub_date = models
1. HOW TO GET DJANGO ADMIN URLS FOR SPECIFIC OBJECTS 1. How to get Django admin urls for specific objects?¶ You have a children column displaying the names of each heroes’ children. You have been asked to link each children to the change page. 13. HOW TO ADD MULTIPLE DATABASES TO THE DJANGO 13. How to add multiple databases to the django application ?¶ The configuration of database related stuff is mostly done in settings.py file. So to add multiple database to our django project we need add them in DATABASES dictionary. 2. HOW TO EXPORT CSV FROM DJANGO ADMIN? 2. How to export CSV from Django admin?¶ You have been asked to add ability to export Hero and Villain from the admin. There are a number of third party apps which allow doing this, but its quite easy without adding another dependency. HOW WEB PAGES GET STYLED IN FRAPPE/ERPNEXT If you want to understand creating webpages in detail and how to customise them, then read our earlier post. Navigate to the desk and under desk navigate to Tools > Website > Web Page > New. Let’s add a ‘What we do’ page. Add the following things in the relevantfields.
WHEN AND HOW TO USE DJANGO FORMVIEW When to use FormView? Django provides several class based generic views to accomplish common tasks. One among them is FormView. FormView should be used when you need a form on the page and want to perform certain action when a valid form is submitted. eg: Having a contact us form and sending an email on form submission.. CreateView would probably be a better choice if you want to insert a DJANGO ADMIN COOKBOOK Django Admin Cookbook - How to do things with Django admin.¶ This is a book about doing things with Django admin. It takes the form of about forty questions HOW SCRIPT ORDERING WORKS IN AN ANGULAR APPSEE MORE ON AGILIQ.COM WHEN AND HOW TO USE DJANGO CREATEVIEW When and how to use Django CreateView. When to use CreateView? Django provides several class based generic views to accomplish common tasks. One among them is CreateView. CreateView should be used when you need a form on the page and need to do a db insertion on submission of avalid form.
1. HOW TO CHANGE ‘DJANGO ADMINISTRATION’ TEXT? By default Django admin shows ‘Django administration’. You have been asked to replace this with ‘UMSRA Administration’. The text is at these pages: 1.1. Login, Listview and Changeview Page ¶. By default it looks like this and is set to “Django administration”. site_header can be set to change this. 1.2. FINDING KEYWORDS USING PYTHON The code is longer than it needs to be make every step as clear as possible. def find_keyword (test_string = 'Hacker news is a good site while Techcrunch not so much'): key_file = open ('keywords2.txt') data = key_file.read () words = data.split () word_freq = {} for word in words: if word in word_freq: word_freq +=1 else: word_freq [word 14. HOW TO USE Q OBJECTS FOR COMPLEX QUERIES? 14. How to use Q objects for complex queries? ¶. In previous chapters we used Q objects for OR and AND and NOT operations. Q objects provides you complete control over the where clause of the query. If you want to OR your conditions. >>> from django.db.models import Q >>> queryset = User.objects.filter ( Q (first_name__startswith='R') | Q 6. HOW TO SELECT SOME FIELDS ONLY IN A QUERYSET? In such situations, we can query only desired fields. Django provides two ways to do this. values and values_list methods on queryset. only_method. Say, we want to get first_name and last_name of all the users whose name starts with R. You do not want the fetch the otherfields to
13. HOW TO FIND DISTINCT FIELD VALUES FROM QUERYSET How to find distinct field values from queryset? ¶. You want to find users whose names have not been repeated. You can do this like this. distinct = User.objects.values( 'first_name' ).annotate( name_count=Count('first_name') ).filter(name_count=1) records = User.objects.filter(first_name__in=) This is HOW WEB PAGES GET STYLED IN FRAPPE/ERPNEXT If you want to understand creating webpages in detail and how to customise them, then read our earlier post. Navigate to the desk and under desk navigate to Tools > Website > Web Page > New. Let’s add a ‘What we do’ page. Add the following things in the relevantfields.
WHEN AND HOW TO USE DJANGO FORMVIEW When to use FormView? Django provides several class based generic views to accomplish common tasks. One among them is FormView. FormView should be used when you need a form on the page and want to perform certain action when a valid form is submitted. eg: Having a contact us form and sending an email on form submission.. CreateView would probably be a better choice if you want to insert a DJANGO ADMIN COOKBOOK Django Admin Cookbook - How to do things with Django admin.¶ This is a book about doing things with Django admin. It takes the form of about forty questions HOW SCRIPT ORDERING WORKS IN AN ANGULAR APPSEE MORE ON AGILIQ.COM WHEN AND HOW TO USE DJANGO CREATEVIEW When and how to use Django CreateView. When to use CreateView? Django provides several class based generic views to accomplish common tasks. One among them is CreateView. CreateView should be used when you need a form on the page and need to do a db insertion on submission of avalid form.
1. HOW TO CHANGE ‘DJANGO ADMINISTRATION’ TEXT? By default Django admin shows ‘Django administration’. You have been asked to replace this with ‘UMSRA Administration’. The text is at these pages: 1.1. Login, Listview and Changeview Page ¶. By default it looks like this and is set to “Django administration”. site_header can be set to change this. 1.2. FINDING KEYWORDS USING PYTHON The code is longer than it needs to be make every step as clear as possible. def find_keyword (test_string = 'Hacker news is a good site while Techcrunch not so much'): key_file = open ('keywords2.txt') data = key_file.read () words = data.split () word_freq = {} for word in words: if word in word_freq: word_freq +=1 else: word_freq [word 14. HOW TO USE Q OBJECTS FOR COMPLEX QUERIES? 14. How to use Q objects for complex queries? ¶. In previous chapters we used Q objects for OR and AND and NOT operations. Q objects provides you complete control over the where clause of the query. If you want to OR your conditions. >>> from django.db.models import Q >>> queryset = User.objects.filter ( Q (first_name__startswith='R') | Q 6. HOW TO SELECT SOME FIELDS ONLY IN A QUERYSET? In such situations, we can query only desired fields. Django provides two ways to do this. values and values_list methods on queryset. only_method. Say, we want to get first_name and last_name of all the users whose name starts with R. You do not want the fetch the otherfields to
13. HOW TO FIND DISTINCT FIELD VALUES FROM QUERYSET How to find distinct field values from queryset? ¶. You want to find users whose names have not been repeated. You can do this like this. distinct = User.objects.values( 'first_name' ).annotate( name_count=Count('first_name') ).filter(name_count=1) records = User.objects.filter(first_name__in=) This is PYTHON AND DJANGO DEVELOPMENT ON WINDOWS WITH WSL Port forwarding. When you run manage.py runserver, which starts on port 8000, inside of WSL, the same servers are also available in windows on same port.. This mapping is automatic, no port forwarding is explicitly required. So if you access localhost:8000 in windows, this is what you see.. Beautiful. Sharing code between Windows andLinux
DJANGO REST FRAMEWORK LISTCREATEAPIVIEW Make the api calls for create and list again and your responses should remain unchanged. In GET calls, the default implementation of ListCreateAPIView.get uses queryset attribute of the class to find the objects which should be serialized and uses serializer_class attribute for serializing.. In POST calls, the default implementation of ListCreateAPIView.post creates an instance of self PRODUCER-CONSUMER PROBLEM IN PYTHON Producer can acquire the lock because lock was released by consumer. Producer puts data in queue and calls notify () on the condition instance. Once notify () call is made on condition, consumer wakes up. But waking up doesn’t mean it starts executing. notify () does notrelease the lock.
LINTERS AND FORMATTERS pycodestyle¶. Pycodestyle (Formerly PEP8) is the official linter tool to check the python code against the style conventions of PEP8 python.. To install it: pip install pycodestyle. Let us take a small example script to test pycodestyle. We will create a test script file test_script.py and use it 6. HOW TO SELECT SOME FIELDS ONLY IN A QUERYSET? In such situations, we can query only desired fields. Django provides two ways to do this. values and values_list methods on queryset. only_method. Say, we want to get first_name and last_name of all the users whose name starts with R. You do not want the fetch the otherfields to
13. HOW TO FIND DISTINCT FIELD VALUES FROM QUERYSET How to find distinct field values from queryset? ¶. You want to find users whose names have not been repeated. You can do this like this. distinct = User.objects.values( 'first_name' ).annotate( name_count=Count('first_name') ).filter(name_count=1) records = User.objects.filter(first_name__in=) This is 2. HOW TO MODEL ONE TO MANY RELATIONSHIPS? In a one-to-many relationship, the parent is not required to have child records; therefore, the one-to-many relationship allows zero child records, a single child record or multiple child records. To define a many-to-one relationship, use ForeignKey .: class Article(models.Model): headline = models.CharField(max_length=100)pub_date = models
1. HOW TO GET DJANGO ADMIN URLS FOR SPECIFIC OBJECTS 1. How to get Django admin urls for specific objects?¶ You have a children column displaying the names of each heroes’ children. You have been asked to link each children to the change page. 13. HOW TO ADD MULTIPLE DATABASES TO THE DJANGO 13. How to add multiple databases to the django application ?¶ The configuration of database related stuff is mostly done in settings.py file. So to add multiple database to our django project we need add them in DATABASES dictionary. 2. HOW TO EXPORT CSV FROM DJANGO ADMIN? 2. How to export CSV from Django admin?¶ You have been asked to add ability to export Hero and Villain from the admin. There are a number of third party apps which allow doing this, but its quite easy without adding another dependency. HOW WEB PAGES GET STYLED IN FRAPPE/ERPNEXT If you want to understand creating webpages in detail and how to customise them, then read our earlier post. Navigate to the desk and under desk navigate to Tools > Website > Web Page > New. Let’s add a ‘What we do’ page. Add the following things in the relevantfields.
DJANGO ADMIN COOKBOOK Django Admin Cookbook - How to do things with Django admin.¶ This is a book about doing things with Django admin. It takes the form of about forty questions WHEN AND HOW TO USE DJANGO CREATEVIEW When and how to use Django CreateView. When to use CreateView? Django provides several class based generic views to accomplish common tasks. One among them is CreateView. CreateView should be used when you need a form on the page and need to do a db insertion on submission of avalid form.
5. HOW TO CONVERT EXISTING DATABASES TO DJANGO MODELS Django comes with a utility called inspectdb that can create models by introspecting an existing database. You can view the output by running this command. $ python manage.py inspectdb. Befor running this you will have to configure your database in the settings.py file. The result will be a file containing a model for each table. 1. HOW TO CHANGE ‘DJANGO ADMINISTRATION’ TEXT? By default Django admin shows ‘Django administration’. You have been asked to replace this with ‘UMSRA Administration’. The text is at these pages: 1.1. Login, Listview and Changeview Page ¶. By default it looks like this and is set to “Django administration”. site_header can be set to change this. 1.2. 2. HOW TO OPTIMIZE QUERIES IN DJANGO ADMIN? This adds two extra queries per row in your listview page. To fix this you can override the get_queryset to annotate the counted fields, and then use the annotated fields in your ModelAdmin methods. With the changes, your ModelAdmin field looks like this: @admin.register(Origin) class OriginAdmin(admin.ModelAdmin): list_display = ("name", "hero 6. HOW TO SELECT SOME FIELDS ONLY IN A QUERYSET? In such situations, we can query only desired fields. Django provides two ways to do this. values and values_list methods on queryset. only_method. Say, we want to get first_name and last_name of all the users whose name starts with R. You do not want the fetch the otherfields to
HOW TO USE JSTREE
Next we need to select the div where the tree will be displayed. We use jquery selector for it. On the selected element we call jstree () and need to pass the required values. Here, we will be using json data to populate our tree. ####So, the fields needed by jstree () in such case are: json_data - This is an object. 2. HOW TO EXPORT CSV FROM DJANGO ADMIN? 2. How to export CSV from Django admin?¶ You have been asked to add ability to export Hero and Villain from the admin. There are a number of third party apps which allow doing this, but its quite easy without adding another dependency. 3. HOW TO MODEL MANY TO MANY RELATIONSHIPS? 3. How to model many to many relationships?¶ A many-to-many relationship refers to a relationship between tables in a database when a parent row in one table contains several child rows in the second table, and vice versa. HOW WEB PAGES GET STYLED IN FRAPPE/ERPNEXT If you want to understand creating webpages in detail and how to customise them, then read our earlier post. Navigate to the desk and under desk navigate to Tools > Website > Web Page > New. Let’s add a ‘What we do’ page. Add the following things in the relevantfields.
DJANGO ADMIN COOKBOOK Django Admin Cookbook - How to do things with Django admin.¶ This is a book about doing things with Django admin. It takes the form of about forty questions WHEN AND HOW TO USE DJANGO CREATEVIEW When and how to use Django CreateView. When to use CreateView? Django provides several class based generic views to accomplish common tasks. One among them is CreateView. CreateView should be used when you need a form on the page and need to do a db insertion on submission of avalid form.
5. HOW TO CONVERT EXISTING DATABASES TO DJANGO MODELS Django comes with a utility called inspectdb that can create models by introspecting an existing database. You can view the output by running this command. $ python manage.py inspectdb. Befor running this you will have to configure your database in the settings.py file. The result will be a file containing a model for each table. 1. HOW TO CHANGE ‘DJANGO ADMINISTRATION’ TEXT? By default Django admin shows ‘Django administration’. You have been asked to replace this with ‘UMSRA Administration’. The text is at these pages: 1.1. Login, Listview and Changeview Page ¶. By default it looks like this and is set to “Django administration”. site_header can be set to change this. 1.2. 2. HOW TO OPTIMIZE QUERIES IN DJANGO ADMIN? This adds two extra queries per row in your listview page. To fix this you can override the get_queryset to annotate the counted fields, and then use the annotated fields in your ModelAdmin methods. With the changes, your ModelAdmin field looks like this: @admin.register(Origin) class OriginAdmin(admin.ModelAdmin): list_display = ("name", "hero 6. HOW TO SELECT SOME FIELDS ONLY IN A QUERYSET? In such situations, we can query only desired fields. Django provides two ways to do this. values and values_list methods on queryset. only_method. Say, we want to get first_name and last_name of all the users whose name starts with R. You do not want the fetch the otherfields to
HOW TO USE JSTREE
Next we need to select the div where the tree will be displayed. We use jquery selector for it. On the selected element we call jstree () and need to pass the required values. Here, we will be using json data to populate our tree. ####So, the fields needed by jstree () in such case are: json_data - This is an object. 2. HOW TO EXPORT CSV FROM DJANGO ADMIN? 2. How to export CSV from Django admin?¶ You have been asked to add ability to export Hero and Villain from the admin. There are a number of third party apps which allow doing this, but its quite easy without adding another dependency. 3. HOW TO MODEL MANY TO MANY RELATIONSHIPS? 3. How to model many to many relationships?¶ A many-to-many relationship refers to a relationship between tables in a database when a parent row in one table contains several child rows in the second table, and vice versa. DJANGO 2.0 WINDOW EXPRESSIONS TUTORIAL Django 2.0 Window expressions tutorial. Django 2.0 was released recently and among the most exciting things for me is support for Window expressions, which allows adding an OVER clause to querysets. We will use Window expressions to analyze the commits data to the Django repo. So what is an over clause? The difference is a GROUP BYhas as many
WHEN AND HOW TO USE DJANGO FORMVIEW When to use FormView? Django provides several class based generic views to accomplish common tasks. One among them is FormView. FormView should be used when you need a form on the page and want to perform certain action when a valid form is submitted. eg: Having a contact us form and sending an email on form submission.. CreateView would probably be a better choice if you want to insert a GETTING STARTED WITH CELERY AND REDIS With celery. The main component of a celery enabled program or a celery setup is the celery worker.. In our web app signup example, celery worker would do the job of sending the emails. In our FB example, celery worker would do the job of fetching the different urls. Similary in our celery_blog.py example, celery worker would do the job of fetching the urls. DEPLOYING DJANGO IN AWS FARGATE Deploying Django in AWS Fargate. We will deploy a Django app in AWS Fargate and use Aurora serverless as the db.. AWS Fargate lets users build and deploy containerized applications without having to manage the underlying servers themselves.. Fargate is a compute engine that allows running containers in Amazon ECS without needing to manage the EC2 servers for cluster.HOW TO USE JSTREE
Next we need to select the div where the tree will be displayed. We use jquery selector for it. On the selected element we call jstree () and need to pass the required values. Here, we will be using json data to populate our tree. ####So, the fields needed by jstree () in such case are: json_data - This is an object. 2. HOW TO DO OR QUERIES IN DJANGO ORM? 2. How to do OR queries in Django ORM?¶ If you are using django.contrib.auth, you will have a table called auth_user.It will have fields as username, first_name, last_name and more.. A common requirement is performing OR filtering with two ore more conditions. Say you want find all users with firstname starting with ‘R’ and last_name starting with ‘D’. USING UBUNTU CLOUD IMAGES IN KVM Let us now use this virtual hard disk as a base for our images and create new guest VM based on this disk.: $ qemu-img create -b ubuntu-12.04-server-cloudimg-amd64.img -f qcow2 new_vm.img. The qemu-img command creates a new_vm.img image with qcow2 format using the ubuntu-12.04-server-cloudimg-amd64.img as the backing image. Rightclick on the
2. HOW TO OPTIMIZE QUERIES IN DJANGO ADMIN? This adds two extra queries per row in your listview page. To fix this you can override the get_queryset to annotate the counted fields, and then use the annotated fields in your ModelAdmin methods. With the changes, your ModelAdmin field looks like this: @admin.register(Origin) class OriginAdmin(admin.ModelAdmin): list_display = ("name", "hero 2. HOW TO RESTRICT ACCESS TO PARTS OF DJANGO ADMIN Introduction; 1. How to change ‘Django administration’ text? 2. How to set the plural text for a model? 3. How to create two independent admin sites? 13. HOW TO FIND DISTINCT FIELD VALUES FROM QUERYSET How to find distinct field values from queryset? ¶. You want to find users whose names have not been repeated. You can do this like this. distinct = User.objects.values( 'first_name' ).annotate( name_count=Count('first_name') ).filter(name_count=1) records = User.objects.filter(first_name__in=) This is* Blog
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READ ABOUT DJANGO, PYTHON, POSTGRES, PANDAS AND MORE. ADVENTURES IN ADVANCED DJANGO ORM WITH HYPERLOGLOG Counting distinct object is a common operation. Most databases and Django make its simple. But can we do quickly? Is Django ORM upto the task? Find out in this post.Continue Reading __
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