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Chainable methods on Model managers
pip install django-chainable-manager==0.5.0
Allows chaining of custom model Manager methods, without jumping through QuerySet hoops.
Simply install the package using pip:
pip install django-chainable-manager
Create a Manager that extends chainablemanager.ChainableManager:
from django.db import models
from chainablemanager.manager import ChainableManager
class PostManager(ChainableManager):
class QuerySetMixin(object):
def published(self):
return self.filter(publish_date__gte=datetime.date.today())
def written_by(self, user):
return self.filter(author=user)
class Post(models.Model):
title = models.CharField(max_length=255)
content = models.TextField()
publish_date = models.DateField()
author = models.ForeignKey('auth.User')
objects = PostManager()
Now use it where ever you need it:
from .models import Post
my_published_posts = Post.objects.written_by(request.user).published()
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