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101 lines
3.5 KiB
Python
101 lines
3.5 KiB
Python
"""
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General tests for relational fields.
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"""
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from __future__ import unicode_literals
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from django.db import models
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from django.test import TestCase
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from rest_framework import serializers
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from rest_framework.tests.models import BlogPost
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class NullModel(models.Model):
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pass
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class FieldTests(TestCase):
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def test_pk_related_field_with_empty_string(self):
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"""
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Regression test for #446
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https://github.com/tomchristie/django-rest-framework/issues/446
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"""
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field = serializers.PrimaryKeyRelatedField(queryset=NullModel.objects.all())
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self.assertRaises(serializers.ValidationError, field.from_native, '')
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self.assertRaises(serializers.ValidationError, field.from_native, [])
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def test_hyperlinked_related_field_with_empty_string(self):
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field = serializers.HyperlinkedRelatedField(queryset=NullModel.objects.all(), view_name='')
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self.assertRaises(serializers.ValidationError, field.from_native, '')
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self.assertRaises(serializers.ValidationError, field.from_native, [])
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def test_slug_related_field_with_empty_string(self):
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field = serializers.SlugRelatedField(queryset=NullModel.objects.all(), slug_field='pk')
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self.assertRaises(serializers.ValidationError, field.from_native, '')
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self.assertRaises(serializers.ValidationError, field.from_native, [])
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class TestManyRelatedMixin(TestCase):
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def test_missing_many_to_many_related_field(self):
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'''
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Regression test for #632
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https://github.com/tomchristie/django-rest-framework/pull/632
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'''
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field = serializers.RelatedField(many=True, read_only=False)
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into = {}
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field.field_from_native({}, None, 'field_name', into)
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self.assertEqual(into['field_name'], [])
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# Regression tests for #694 (`source` attribute on related fields)
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class RelatedFieldSourceTests(TestCase):
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def test_related_manager_source(self):
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"""
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Relational fields should be able to use manager-returning methods as their source.
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"""
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BlogPost.objects.create(title='blah')
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field = serializers.RelatedField(many=True, source='get_blogposts_manager')
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class ClassWithManagerMethod(object):
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def get_blogposts_manager(self):
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return BlogPost.objects
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obj = ClassWithManagerMethod()
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value = field.field_to_native(obj, 'field_name')
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self.assertEqual(value, ['BlogPost object'])
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def test_related_queryset_source(self):
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"""
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Relational fields should be able to use queryset-returning methods as their source.
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"""
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BlogPost.objects.create(title='blah')
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field = serializers.RelatedField(many=True, source='get_blogposts_queryset')
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class ClassWithQuerysetMethod(object):
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def get_blogposts_queryset(self):
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return BlogPost.objects.all()
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obj = ClassWithQuerysetMethod()
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value = field.field_to_native(obj, 'field_name')
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self.assertEqual(value, ['BlogPost object'])
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def test_dotted_source(self):
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"""
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Source argument should support dotted.source notation.
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"""
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BlogPost.objects.create(title='blah')
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field = serializers.RelatedField(many=True, source='a.b.c')
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class ClassWithQuerysetMethod(object):
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a = {
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'b': {
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'c': BlogPost.objects.all()
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}
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}
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obj = ClassWithQuerysetMethod()
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value = field.field_to_native(obj, 'field_name')
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self.assertEqual(value, ['BlogPost object'])
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