django-middleware-global-request 0.3.0

Django middleware that keep request instance for every thread.

django-middleware-global-request

Django middleware that keep request instance for every thread.

Install

pip install django-middleware-global-request

Note

• It's NOT good to use global request, you should pass the request instance from view to anywhere you want to use it.
• If you use the global request in Model layout, it means when you call the Model method from Django Shell, you get a None request.

Usage

1. Add django application django_middleware_global_request to INSTALLED_APPS in pro/settings.py:

   INSTALLED_APPS = [
       ...
       'django_middleware_global_request',
       ...
   ]
   

2. Add GlobalRequestMiddleware to MIDDLEWARE in pro/settings.py:

   MIDDLEWARE = [
       ...
       'django_middleware_global_request.middleware.GlobalRequestMiddleware',
       ...
   ]
   

3. Use get_request to get the global request instance from a function in pro/models.py:

   from django.db import models
   from django.conf import settings
   from django_middleware_global_request import get_request
   
   class Book(models.Model):
       name = models.CharField(max_length=64)
       author = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.SET_NULL, null=True, blank=True)
   
       def __str__(self):
           return self.name
   
       def save(self, *args, **kwargs):
           if not self.author:
               request = get_request()
               if request:
                   self.author = request.user
           return super().save(*args, **kwargs)
   

4. Use with GlobalRequest(xxx): pass to set the global request to a new value in NON-USER-REQUEST context, e.g. in management command context or in python manage.py shell context. Out of the with scope, the global request instance will be reset to the value when entering into the with scope.

   import djclick as click
   from django.contrib.auth import get_user_model
   from django_middleware_global_request_example.models import Book
   from django_middleware_global_request import GlobalRequest
   
   
   @click.command()
   @click.option("-n", "--number", type=int, default=10)
   def create(number):
       admin = get_user_model().objects.all()[0]
       with GlobalRequest(user=admin):
           for i in range(number):
               book = Book(name="book{idx}".format(idx=i+1))
               book.save()
               print(i, book.name, book.author.username)
   

5. Use GlobalRequestStorage to set the global request instance for current thread context. The global request instance will all time exists until you changed it by another value.

example.py

from django.contrib.auth import get_user_model
from django_middleware_global_request_example.models import Book
from django_middleware_global_request import GlobalRequestStorage

b1 = Book(name="b1")
b1.save()
print(b1, b1.author)

admin = get_user_model().objects.get(username="admin")
GlobalRequestStorage().set_user(admin)

b2 = Book(name="b2")
b2.save()
print(b2, b2.author)

b3 = Book(name="b3")
b3.save()
print(b3, b3.author)

example result in python3 manage.py shell context

test@test django-middleware-global-request % python3.9 manage.py shell
Python 3.9.13 (main, Jun  8 2022, 15:40:49) 
Type 'copyright', 'credits' or 'license' for more information
IPython 8.3.0 -- An enhanced Interactive Python. Type '?' for help.

In [1]: import example
b1 None
b2 admin
b3 admin

Test report

Django 1.11.xx

• Python 2.7 passed
• Python 3.5 passed
• Python 3.6 passed
• Python 3.7 passed
• Python 3.8 passed
• Python 3.9 passed
• Python 3.10 failed

Django 2.2.xx

• Python 2.7 failed
• Python 3.5 passed
• Python 3.6 passed
• Python 3.7 passed
• Python 3.8 passed
• Python 3.9 passed
• Python 3.10 passed

Django 3.2.xx

• Python 2.7 failed
• Python 3.5 failed
• Python 3.6 passed
• Python 3.7 passed
• Python 3.8 passed
• Python 3.9 passed
• Python 3.10 passed

Django 4.0.xx

• Python 2.7 failed
• Python 3.5 failed
• Python 3.6 failed
• Python 3.7 failed
• Python 3.8 passed
• Python 3.9 passed
• Python 3.10 passed

The reason of the failture is django can not work under these python versions.

Releases

v0.3.0

• Add GlobalRequest and GlobalRequestStorage to set the global request instance value for NON-USER-REQUEST context.

v0.2.0

• Rename the core package from django_global_request to django_middleware_global_request so that it matches with the package name. Note: It's NOT backward compatible, all applications that using old name MUST do changes.

v0.1.2

• Some changes.

v0.1.1

• Some changes.

v0.1.0

• First release.