Python Django custom template tags register.assignment_tag not working
django, django-templates, python
Solution
Even though this question is a few years old, people recently may be seeing this error again, but for a different reason. Here's the error again:
AttributeError: 'Library' object has no attribute 'assignment_tag'
You may be seeing this error after upgrading to Django 2.0. This is because `assignment_tag` was deprecated in Django 1.9, and removed in Django 2.0:
Django 1.4 added the `assignment_tag` helper to ease the creation of template tags that store results in a template variable. The `simple_tag()` helper has gained this same ability, making the `assignment_tag` obsolete. Tags that use `assignment_tag` should be updated to use `simple_tag`.
Note that the behaviour of `simple_tag` is similar but not identical to `assignment_tag` in Django 1.8.
Problem
This is my Code for Python Django custom template tags ``` from django import template from ipc.declarations.models import MainDeclaration from django.shortcuts import get_object_or_404 register = template.Library() def section_settings(declarationId,user): declaration = get_object_or_404(MainDeclaration, pk=declarationId, user=user) businessInfo = declaration.GetOrCreateBusinessInfo() sections = declaration.GetSections() return sections register.assignment_tag(section_settings) ``` Now i am getting a error `register.assignment_tag(section_settings) [Thu Jan 09 06:50:44 2014] [error] [client 127.0.0.1] AttributeError: 'Library' object has no attribute 'assignment_tag'` This works fine with my development server application , but not working while uploading the same code in Production server. Please guide me.