Remove unused compat._resolve_model() (#5733)

Last use removed in c674687.

Author: jdufresne

rest_framework/compat.py

@@ -5,14 +5,9 @@
 
 from __future__ import unicode_literals
 
-import inspect
-
 import django
-from django.apps import apps
 from django.conf import settings
 from django.core import validators
-from django.core.exceptions import ImproperlyConfigured
-from django.db import models
 from django.utils import six
 from django.views.generic import View
 
@@ -107,30 +102,6 @@ def distinct(queryset, base):
     return queryset.distinct()
 
 
-def _resolve_model(obj):
-    """
-    Resolve supplied `obj` to a Django model class.
-
-    `obj` must be a Django model class itself, or a string
-    representation of one.  Useful in situations like GH #1225 where
-    Django may not have resolved a string-based reference to a model in
-    another model's foreign key definition.
-
-    String representations should have the format:
-        'appname.ModelName'
-    """
-    if isinstance(obj, six.string_types) and len(obj.split('.')) == 2:
-        app_name, model_name = obj.split('.')
-        resolved_model = apps.get_model(app_name, model_name)
-        if resolved_model is None:
-            msg = "Django did not return a model for {0}.{1}"
-            raise ImproperlyConfigured(msg.format(app_name, model_name))
-        return resolved_model
-    elif inspect.isclass(obj) and issubclass(obj, models.Model):
-        return obj
-    raise ValueError("{0} is not a Django model".format(obj))
-
-
 # django.contrib.postgres requires psycopg2
 try:
     from django.contrib.postgres import fields as postgres_fields

tests/test_utils.py

@@ -2,12 +2,8 @@
 from __future__ import unicode_literals
 
 from django.conf.urls import url
-from django.core.exceptions import ImproperlyConfigured
 from django.test import TestCase, override_settings
-from django.utils import six
 
-import rest_framework.utils.model_meta
-from rest_framework.compat import _resolve_model
 from rest_framework.routers import SimpleRouter
 from rest_framework.serializers import ModelSerializer
 from rest_framework.utils import json
@@ -124,64 +120,6 @@ def test_modelviewset_resource_instance_breadcrumbs(self):
         ]
 
 
-class ResolveModelTests(TestCase):
-    """
-    `_resolve_model` should return a Django model class given the
-    provided argument is a Django model class itself, or a properly
-    formatted string representation of one.
-    """
-    def test_resolve_django_model(self):
-        resolved_model = _resolve_model(BasicModel)
-        assert resolved_model == BasicModel
-
-    def test_resolve_string_representation(self):
-        resolved_model = _resolve_model('tests.BasicModel')
-        assert resolved_model == BasicModel
-
-    def test_resolve_unicode_representation(self):
-        resolved_model = _resolve_model(six.text_type('tests.BasicModel'))
-        assert resolved_model == BasicModel
-
-    def test_resolve_non_django_model(self):
-        with self.assertRaises(ValueError):
-            _resolve_model(TestCase)
-
-    def test_resolve_improper_string_representation(self):
-        with self.assertRaises(ValueError):
-            _resolve_model('BasicModel')
-
-
-class ResolveModelWithPatchedDjangoTests(TestCase):
-    """
-    Test coverage for when Django's `get_model` returns `None`.
-
-    Under certain circumstances Django may return `None` with `get_model`:
-    http://git.io/get-model-source
-
-    It usually happens with circular imports so it is important that DRF
-    excepts early, otherwise fault happens downstream and is much more
-    difficult to debug.
-
-    """
-
-    def setUp(self):
-        """Monkeypatch get_model."""
-        self.get_model = rest_framework.compat.apps.get_model
-
-        def get_model(app_label, model_name):
-            return None
-
-        rest_framework.compat.apps.get_model = get_model
-
-    def tearDown(self):
-        """Revert monkeypatching."""
-        rest_framework.compat.apps.get_model = self.get_model
-
-    def test_blows_up_if_model_does_not_resolve(self):
-        with self.assertRaises(ImproperlyConfigured):
-            _resolve_model('tests.BasicModel')
-
-
 class JsonFloatTests(TestCase):
     """
     Internaly, wrapped json functions should adhere to strict float handling