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# """
# General tests for relational fields.
# """
# from __future__ import unicode_literals
# from django import get_version
# from django.db import models
# from django.test import TestCase
# from django.utils import unittest
# from rest_framework import serializers
# from tests.models import BlogPost
# class NullModel(models.Model):
# pass
# class FieldTests(TestCase):
# def test_pk_related_field_with_empty_string(self):
# """
# Regression test for #446
# https://github.com/tomchristie/django-rest-framework/issues/446
# """
# field = serializers.PrimaryKeyRelatedField(queryset=NullModel.objects.all())
# self.assertRaises(serializers.ValidationError, field.to_primative, '')
# self.assertRaises(serializers.ValidationError, field.to_primative, [])
# def test_hyperlinked_related_field_with_empty_string(self):
# field = serializers.HyperlinkedRelatedField(queryset=NullModel.objects.all(), view_name='')
# self.assertRaises(serializers.ValidationError, field.to_primative, '')
# self.assertRaises(serializers.ValidationError, field.to_primative, [])
# def test_slug_related_field_with_empty_string(self):
# field = serializers.SlugRelatedField(queryset=NullModel.objects.all(), slug_field='pk')
# self.assertRaises(serializers.ValidationError, field.to_primative, '')
# self.assertRaises(serializers.ValidationError, field.to_primative, [])
# class TestManyRelatedMixin(TestCase):
# def test_missing_many_to_many_related_field(self):
# '''
# Regression test for #632
# https://github.com/tomchristie/django-rest-framework/pull/632
# '''
# field = serializers.RelatedField(many=True, read_only=False)
# into = {}
# field.field_from_native({}, None, 'field_name', into)
# self.assertEqual(into['field_name'], [])
# # Regression tests for #694 (`source` attribute on related fields)
# class RelatedFieldSourceTests(TestCase):
# def test_related_manager_source(self):
# """
# Relational fields should be able to use manager-returning methods as their source.
# """
# BlogPost.objects.create(title='blah')
# field = serializers.RelatedField(many=True, source='get_blogposts_manager')
# class ClassWithManagerMethod(object):
# def get_blogposts_manager(self):
# return BlogPost.objects
# obj = ClassWithManagerMethod()
# value = field.field_to_native(obj, 'field_name')
# self.assertEqual(value, ['BlogPost object'])
# def test_related_queryset_source(self):
# """
# Relational fields should be able to use queryset-returning methods as their source.
# """
# BlogPost.objects.create(title='blah')
# field = serializers.RelatedField(many=True, source='get_blogposts_queryset')
# class ClassWithQuerysetMethod(object):
# def get_blogposts_queryset(self):
# return BlogPost.objects.all()
# obj = ClassWithQuerysetMethod()
# value = field.field_to_native(obj, 'field_name')
# self.assertEqual(value, ['BlogPost object'])
# def test_dotted_source(self):
# """
# Source argument should support dotted.source notation.
# """
# BlogPost.objects.create(title='blah')
# field = serializers.RelatedField(many=True, source='a.b.c')
# class ClassWithQuerysetMethod(object):
# a = {
# 'b': {
# 'c': BlogPost.objects.all()
# }
# }
# obj = ClassWithQuerysetMethod()
# value = field.field_to_native(obj, 'field_name')
# self.assertEqual(value, ['BlogPost object'])
# # Regression for #1129
# def test_exception_for_incorect_fk(self):
# """
# Check that the exception message are correct if the source field
# doesn't exist.
# """
# from tests.models import ManyToManySource
# class Meta:
# model = ManyToManySource
# attrs = {
# 'name': serializers.SlugRelatedField(
# slug_field='name', source='banzai'),
# 'Meta': Meta,
# }
# TestSerializer = type(
# str('TestSerializer'),
# (serializers.ModelSerializer,),
# attrs
# )
# with self.assertRaises(AttributeError):
# TestSerializer(data={'name': 'foo'})
# @unittest.skipIf(get_version() < '1.6.0', 'Upstream behaviour changed in v1.6')
# class RelatedFieldChoicesTests(TestCase):
# """
# Tests for #1408 "Web browseable API doesn't have blank option on drop down list box"
# https://github.com/tomchristie/django-rest-framework/issues/1408
# """
# def test_blank_option_is_added_to_choice_if_required_equals_false(self):
# """
# """
# post = BlogPost(title="Checking blank option is added")
# post.save()
# queryset = BlogPost.objects.all()
# field = serializers.RelatedField(required=False, queryset=queryset)
# choice_count = BlogPost.objects.count()
# widget_count = len(field.widget.choices)
# self.assertEqual(widget_count, choice_count + 1, 'BLANK_CHOICE_DASH option should have been added')
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