mirror of
https://github.com/django/django.git
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677 lines
25 KiB
Python
677 lines
25 KiB
Python
# -*- coding: utf-8 -*-
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from __future__ import unicode_literals
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import json
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import re
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from datetime import datetime
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from xml.dom import minidom
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from django.core import serializers
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from django.core.serializers.base import ProgressBar
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from django.db import connection, transaction
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from django.test import (
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SimpleTestCase, TestCase, TransactionTestCase, mock, override_settings,
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skipUnlessDBFeature,
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)
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from django.test.utils import Approximate
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from django.utils import six
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from django.utils.six import StringIO
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from .models import (
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Actor, Article, Author, AuthorProfile, Category, Movie, Player, Score,
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Team,
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)
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@override_settings(
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SERIALIZATION_MODULES={
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"json2": "django.core.serializers.json",
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}
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)
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class SerializerRegistrationTests(SimpleTestCase):
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def setUp(self):
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self.old_serializers = serializers._serializers
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serializers._serializers = {}
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def tearDown(self):
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serializers._serializers = self.old_serializers
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def test_register(self):
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"Registering a new serializer populates the full registry. Refs #14823"
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serializers.register_serializer('json3', 'django.core.serializers.json')
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public_formats = serializers.get_public_serializer_formats()
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self.assertIn('json3', public_formats)
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self.assertIn('json2', public_formats)
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self.assertIn('xml', public_formats)
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def test_unregister(self):
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"Unregistering a serializer doesn't cause the registry to be repopulated. Refs #14823"
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serializers.unregister_serializer('xml')
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serializers.register_serializer('json3', 'django.core.serializers.json')
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public_formats = serializers.get_public_serializer_formats()
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self.assertNotIn('xml', public_formats)
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self.assertIn('json3', public_formats)
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def test_builtin_serializers(self):
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"Requesting a list of serializer formats popuates the registry"
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all_formats = set(serializers.get_serializer_formats())
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public_formats = set(serializers.get_public_serializer_formats())
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self.assertIn('xml', all_formats),
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self.assertIn('xml', public_formats)
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self.assertIn('json2', all_formats)
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self.assertIn('json2', public_formats)
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self.assertIn('python', all_formats)
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self.assertNotIn('python', public_formats)
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class SerializersTestBase(object):
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@staticmethod
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def _comparison_value(value):
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return value
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def setUp(self):
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sports = Category.objects.create(name="Sports")
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music = Category.objects.create(name="Music")
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op_ed = Category.objects.create(name="Op-Ed")
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self.joe = Author.objects.create(name="Joe")
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self.jane = Author.objects.create(name="Jane")
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self.a1 = Article(
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author=self.jane,
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headline="Poker has no place on ESPN",
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pub_date=datetime(2006, 6, 16, 11, 00)
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)
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self.a1.save()
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self.a1.categories = [sports, op_ed]
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self.a2 = Article(
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author=self.joe,
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headline="Time to reform copyright",
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pub_date=datetime(2006, 6, 16, 13, 00, 11, 345)
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)
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self.a2.save()
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self.a2.categories = [music, op_ed]
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def test_serialize(self):
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"""Tests that basic serialization works."""
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serial_str = serializers.serialize(self.serializer_name,
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Article.objects.all())
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self.assertTrue(self._validate_output(serial_str))
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def test_serializer_roundtrip(self):
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"""Tests that serialized content can be deserialized."""
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serial_str = serializers.serialize(self.serializer_name,
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Article.objects.all())
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models = list(serializers.deserialize(self.serializer_name, serial_str))
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self.assertEqual(len(models), 2)
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def test_altering_serialized_output(self):
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"""
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Tests the ability to create new objects by
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modifying serialized content.
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"""
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old_headline = "Poker has no place on ESPN"
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new_headline = "Poker has no place on television"
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serial_str = serializers.serialize(self.serializer_name,
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Article.objects.all())
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serial_str = serial_str.replace(old_headline, new_headline)
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models = list(serializers.deserialize(self.serializer_name, serial_str))
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# Prior to saving, old headline is in place
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self.assertTrue(Article.objects.filter(headline=old_headline))
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self.assertFalse(Article.objects.filter(headline=new_headline))
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for model in models:
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model.save()
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# After saving, new headline is in place
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self.assertTrue(Article.objects.filter(headline=new_headline))
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self.assertFalse(Article.objects.filter(headline=old_headline))
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def test_one_to_one_as_pk(self):
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"""
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Tests that if you use your own primary key field
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(such as a OneToOneField), it doesn't appear in the
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serialized field list - it replaces the pk identifier.
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"""
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profile = AuthorProfile(author=self.joe,
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date_of_birth=datetime(1970, 1, 1))
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profile.save()
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serial_str = serializers.serialize(self.serializer_name,
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AuthorProfile.objects.all())
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self.assertFalse(self._get_field_values(serial_str, 'author'))
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for obj in serializers.deserialize(self.serializer_name, serial_str):
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self.assertEqual(obj.object.pk, self._comparison_value(self.joe.pk))
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def test_serialize_field_subset(self):
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"""Tests that output can be restricted to a subset of fields"""
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valid_fields = ('headline', 'pub_date')
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invalid_fields = ("author", "categories")
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serial_str = serializers.serialize(self.serializer_name,
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Article.objects.all(),
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fields=valid_fields)
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for field_name in invalid_fields:
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self.assertFalse(self._get_field_values(serial_str, field_name))
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for field_name in valid_fields:
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self.assertTrue(self._get_field_values(serial_str, field_name))
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def test_serialize_unicode(self):
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"""Tests that unicode makes the roundtrip intact"""
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actor_name = "Za\u017c\u00f3\u0142\u0107"
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movie_title = 'G\u0119\u015bl\u0105 ja\u017a\u0144'
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ac = Actor(name=actor_name)
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mv = Movie(title=movie_title, actor=ac)
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ac.save()
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mv.save()
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serial_str = serializers.serialize(self.serializer_name, [mv])
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self.assertEqual(self._get_field_values(serial_str, "title")[0], movie_title)
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self.assertEqual(self._get_field_values(serial_str, "actor")[0], actor_name)
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obj_list = list(serializers.deserialize(self.serializer_name, serial_str))
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mv_obj = obj_list[0].object
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self.assertEqual(mv_obj.title, movie_title)
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def test_serialize_progressbar(self):
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fake_stdout = StringIO()
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serializers.serialize(
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self.serializer_name, Article.objects.all(),
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progress_output=fake_stdout, object_count=Article.objects.count()
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)
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self.assertTrue(
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fake_stdout.getvalue().endswith('[' + '.' * ProgressBar.progress_width + ']\n')
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)
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def test_serialize_superfluous_queries(self):
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"""Ensure no superfluous queries are made when serializing ForeignKeys
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#17602
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"""
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ac = Actor(name='Actor name')
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ac.save()
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mv = Movie(title='Movie title', actor_id=ac.pk)
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mv.save()
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with self.assertNumQueries(0):
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serializers.serialize(self.serializer_name, [mv])
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def test_serialize_with_null_pk(self):
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"""
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Tests that serialized data with no primary key results
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in a model instance with no id
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"""
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category = Category(name="Reference")
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serial_str = serializers.serialize(self.serializer_name, [category])
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pk_value = self._get_pk_values(serial_str)[0]
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self.assertFalse(pk_value)
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cat_obj = list(serializers.deserialize(self.serializer_name,
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serial_str))[0].object
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self.assertEqual(cat_obj.id, None)
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def test_float_serialization(self):
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"""Tests that float values serialize and deserialize intact"""
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sc = Score(score=3.4)
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sc.save()
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serial_str = serializers.serialize(self.serializer_name, [sc])
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deserial_objs = list(serializers.deserialize(self.serializer_name,
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serial_str))
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self.assertEqual(deserial_objs[0].object.score, Approximate(3.4, places=1))
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def test_deferred_field_serialization(self):
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author = Author.objects.create(name='Victor Hugo')
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author = Author.objects.defer('name').get(pk=author.pk)
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serial_str = serializers.serialize(self.serializer_name, [author])
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deserial_objs = list(serializers.deserialize(self.serializer_name, serial_str))
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# Check the class instead of using isinstance() because model instances
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# with deferred fields (e.g. Author_Deferred_name) will pass isinstance.
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self.assertEqual(deserial_objs[0].object.__class__, Author)
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def test_custom_field_serialization(self):
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"""Tests that custom fields serialize and deserialize intact"""
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team_str = "Spartak Moskva"
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player = Player()
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player.name = "Soslan Djanaev"
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player.rank = 1
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player.team = Team(team_str)
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player.save()
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serial_str = serializers.serialize(self.serializer_name,
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Player.objects.all())
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team = self._get_field_values(serial_str, "team")
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self.assertTrue(team)
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self.assertEqual(team[0], team_str)
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deserial_objs = list(serializers.deserialize(self.serializer_name, serial_str))
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self.assertEqual(deserial_objs[0].object.team.to_string(),
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player.team.to_string())
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def test_pre_1000ad_date(self):
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"""Tests that year values before 1000AD are properly formatted"""
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# Regression for #12524 -- dates before 1000AD get prefixed
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# 0's on the year
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a = Article.objects.create(
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author=self.jane,
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headline="Nobody remembers the early years",
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pub_date=datetime(1, 2, 3, 4, 5, 6))
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serial_str = serializers.serialize(self.serializer_name, [a])
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date_values = self._get_field_values(serial_str, "pub_date")
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self.assertEqual(date_values[0].replace('T', ' '), "0001-02-03 04:05:06")
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def test_pkless_serialized_strings(self):
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"""
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Tests that serialized strings without PKs
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can be turned into models
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"""
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deserial_objs = list(serializers.deserialize(self.serializer_name,
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self.pkless_str))
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for obj in deserial_objs:
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self.assertFalse(obj.object.id)
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obj.save()
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self.assertEqual(Category.objects.all().count(), 5)
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def test_deterministic_mapping_ordering(self):
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"""Mapping such as fields should be deterministically ordered. (#24558)"""
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output = serializers.serialize(self.serializer_name, [self.a1], indent=2)
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categories = self.a1.categories.values_list('pk', flat=True)
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self.assertEqual(output, self.mapping_ordering_str % {
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'article_pk': self.a1.pk,
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'author_pk': self.a1.author_id,
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'first_category_pk': categories[0],
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'second_category_pk': categories[1],
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})
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def test_deserialize_force_insert(self):
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"""Tests that deserialized content can be saved with force_insert as a parameter."""
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serial_str = serializers.serialize(self.serializer_name, [self.a1])
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deserial_obj = list(serializers.deserialize(self.serializer_name, serial_str))[0]
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with mock.patch('django.db.models.Model') as mock_model:
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deserial_obj.save(force_insert=False)
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mock_model.save_base.assert_called_with(deserial_obj.object, raw=True, using=None, force_insert=False)
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class SerializersTransactionTestBase(object):
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available_apps = ['serializers']
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@skipUnlessDBFeature('supports_forward_references')
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def test_forward_refs(self):
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"""
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Tests that objects ids can be referenced before they are
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defined in the serialization data.
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"""
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# The deserialization process needs to run in a transaction in order
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# to test forward reference handling.
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with transaction.atomic():
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objs = serializers.deserialize(self.serializer_name, self.fwd_ref_str)
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with connection.constraint_checks_disabled():
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for obj in objs:
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obj.save()
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for model_cls in (Category, Author, Article):
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self.assertEqual(model_cls.objects.all().count(), 1)
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art_obj = Article.objects.all()[0]
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self.assertEqual(art_obj.categories.all().count(), 1)
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self.assertEqual(art_obj.author.name, "Agnes")
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class XmlSerializerTestCase(SerializersTestBase, TestCase):
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serializer_name = "xml"
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pkless_str = """<?xml version="1.0" encoding="utf-8"?>
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<django-objects version="1.0">
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<object model="serializers.category">
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<field type="CharField" name="name">Reference</field>
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</object>
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<object model="serializers.category">
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<field type="CharField" name="name">Non-fiction</field>
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</object>
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</django-objects>"""
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mapping_ordering_str = """<?xml version="1.0" encoding="utf-8"?>
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<django-objects version="1.0">
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<object model="serializers.article" pk="%(article_pk)s">
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<field name="author" rel="ManyToOneRel" to="serializers.author">%(author_pk)s</field>
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<field name="headline" type="CharField">Poker has no place on ESPN</field>
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<field name="pub_date" type="DateTimeField">2006-06-16T11:00:00</field>
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<field name="categories" rel="ManyToManyRel" to="serializers.category"><object pk="%(first_category_pk)s"></object><object pk="%(second_category_pk)s"></object></field>
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<field name="meta_data" rel="ManyToManyRel" to="serializers.categorymetadata"></field>
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</object>
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</django-objects>""" # NOQA
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@staticmethod
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def _comparison_value(value):
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# The XML serializer handles everything as strings, so comparisons
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# need to be performed on the stringified value
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return six.text_type(value)
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@staticmethod
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def _validate_output(serial_str):
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try:
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minidom.parseString(serial_str)
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except Exception:
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return False
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else:
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return True
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@staticmethod
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def _get_pk_values(serial_str):
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ret_list = []
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dom = minidom.parseString(serial_str)
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fields = dom.getElementsByTagName("object")
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for field in fields:
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ret_list.append(field.getAttribute("pk"))
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return ret_list
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@staticmethod
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def _get_field_values(serial_str, field_name):
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ret_list = []
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dom = minidom.parseString(serial_str)
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fields = dom.getElementsByTagName("field")
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for field in fields:
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if field.getAttribute("name") == field_name:
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temp = []
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for child in field.childNodes:
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temp.append(child.nodeValue)
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ret_list.append("".join(temp))
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return ret_list
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def test_control_char_failure(self):
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"""
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Serializing control characters with XML should fail as those characters
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are not supported in the XML 1.0 standard (except HT, LF, CR).
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"""
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self.a1.headline = "This contains \u0001 control \u0011 chars"
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msg = "Article.headline (pk:%s) contains unserializable characters" % self.a1.pk
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with self.assertRaisesMessage(ValueError, msg):
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serializers.serialize(self.serializer_name, [self.a1])
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self.a1.headline = "HT \u0009, LF \u000A, and CR \u000D are allowed"
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self.assertIn(
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"HT \t, LF \n, and CR \r are allowed",
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serializers.serialize(self.serializer_name, [self.a1])
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)
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class XmlSerializerTransactionTestCase(SerializersTransactionTestBase, TransactionTestCase):
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serializer_name = "xml"
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fwd_ref_str = """<?xml version="1.0" encoding="utf-8"?>
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<django-objects version="1.0">
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<object pk="1" model="serializers.article">
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<field to="serializers.author" name="author" rel="ManyToOneRel">1</field>
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<field type="CharField" name="headline">Forward references pose no problem</field>
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<field type="DateTimeField" name="pub_date">2006-06-16T15:00:00</field>
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<field to="serializers.category" name="categories" rel="ManyToManyRel">
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<object pk="1"></object>
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</field>
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<field to="serializers.categorymetadata" name="meta_data" rel="ManyToManyRel"></field>
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</object>
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<object pk="1" model="serializers.author">
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<field type="CharField" name="name">Agnes</field>
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</object>
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<object pk="1" model="serializers.category">
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<field type="CharField" name="name">Reference</field></object>
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</django-objects>"""
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class JsonSerializerTestCase(SerializersTestBase, TestCase):
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serializer_name = "json"
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pkless_str = """[
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{
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"pk": null,
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"model": "serializers.category",
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"fields": {"name": "Reference"}
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}, {
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"model": "serializers.category",
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"fields": {"name": "Non-fiction"}
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}]"""
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mapping_ordering_str = """[
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{
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"model": "serializers.article",
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"pk": %(article_pk)s,
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"fields": {
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"author": %(author_pk)s,
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"headline": "Poker has no place on ESPN",
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"pub_date": "2006-06-16T11:00:00",
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"categories": [
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%(first_category_pk)s,
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%(second_category_pk)s
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],
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"meta_data": []
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}
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}
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]
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"""
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@staticmethod
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def _validate_output(serial_str):
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try:
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json.loads(serial_str)
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except Exception:
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return False
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else:
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return True
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@staticmethod
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def _get_pk_values(serial_str):
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ret_list = []
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serial_list = json.loads(serial_str)
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for obj_dict in serial_list:
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ret_list.append(obj_dict["pk"])
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return ret_list
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@staticmethod
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def _get_field_values(serial_str, field_name):
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ret_list = []
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serial_list = json.loads(serial_str)
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|
for obj_dict in serial_list:
|
|
if field_name in obj_dict["fields"]:
|
|
ret_list.append(obj_dict["fields"][field_name])
|
|
return ret_list
|
|
|
|
def test_indentation_whitespace(self):
|
|
Score.objects.create(score=5.0)
|
|
Score.objects.create(score=6.0)
|
|
qset = Score.objects.all()
|
|
|
|
s = serializers.json.Serializer()
|
|
json_data = s.serialize(qset, indent=2)
|
|
for line in json_data.splitlines():
|
|
if re.search(r'.+,\s*$', line):
|
|
self.assertEqual(line, line.rstrip())
|
|
|
|
def test_helpful_error_message_invalid_pk(self):
|
|
"""
|
|
If there is an invalid primary key, the error message should contain
|
|
the model associated with it.
|
|
"""
|
|
test_string = """[{
|
|
"pk": "badpk",
|
|
"model": "serializers.player",
|
|
"fields": {
|
|
"name": "Bob",
|
|
"rank": 1,
|
|
"team": "Team"
|
|
}
|
|
}]"""
|
|
with self.assertRaisesMessage(serializers.base.DeserializationError, "(serializers.player:pk=badpk)"):
|
|
list(serializers.deserialize('json', test_string))
|
|
|
|
def test_helpful_error_message_invalid_field(self):
|
|
"""
|
|
If there is an invalid field value, the error message should contain
|
|
the model associated with it.
|
|
"""
|
|
test_string = """[{
|
|
"pk": "1",
|
|
"model": "serializers.player",
|
|
"fields": {
|
|
"name": "Bob",
|
|
"rank": "invalidint",
|
|
"team": "Team"
|
|
}
|
|
}]"""
|
|
expected = "(serializers.player:pk=1) field_value was 'invalidint'"
|
|
with self.assertRaisesMessage(serializers.base.DeserializationError, expected):
|
|
list(serializers.deserialize('json', test_string))
|
|
|
|
def test_helpful_error_message_for_foreign_keys(self):
|
|
"""
|
|
Invalid foreign keys with a natural key should throw a helpful error
|
|
message, such as what the failing key is.
|
|
"""
|
|
test_string = """[{
|
|
"pk": 1,
|
|
"model": "serializers.category",
|
|
"fields": {
|
|
"name": "Unknown foreign key",
|
|
"meta_data": [
|
|
"doesnotexist",
|
|
"metadata"
|
|
]
|
|
}
|
|
}]"""
|
|
key = ["doesnotexist", "metadata"]
|
|
expected = "(serializers.category:pk=1) field_value was '%r'" % key
|
|
with self.assertRaisesMessage(serializers.base.DeserializationError, expected):
|
|
list(serializers.deserialize('json', test_string))
|
|
|
|
def test_helpful_error_message_for_many2many_non_natural(self):
|
|
"""
|
|
Invalid many-to-many keys should throw a helpful error message.
|
|
"""
|
|
test_string = """[{
|
|
"pk": 1,
|
|
"model": "serializers.article",
|
|
"fields": {
|
|
"author": 1,
|
|
"headline": "Unknown many to many",
|
|
"pub_date": "2014-09-15T10:35:00",
|
|
"categories": [1, "doesnotexist"]
|
|
}
|
|
}, {
|
|
"pk": 1,
|
|
"model": "serializers.author",
|
|
"fields": {
|
|
"name": "Agnes"
|
|
}
|
|
}, {
|
|
"pk": 1,
|
|
"model": "serializers.category",
|
|
"fields": {
|
|
"name": "Reference"
|
|
}
|
|
}]"""
|
|
expected = "(serializers.article:pk=1) field_value was 'doesnotexist'"
|
|
with self.assertRaisesMessage(serializers.base.DeserializationError, expected):
|
|
list(serializers.deserialize('json', test_string))
|
|
|
|
def test_helpful_error_message_for_many2many_natural1(self):
|
|
"""
|
|
Invalid many-to-many keys should throw a helpful error message.
|
|
This tests the code path where one of a list of natural keys is invalid.
|
|
"""
|
|
test_string = """[{
|
|
"pk": 1,
|
|
"model": "serializers.categorymetadata",
|
|
"fields": {
|
|
"kind": "author",
|
|
"name": "meta1",
|
|
"value": "Agnes"
|
|
}
|
|
}, {
|
|
"pk": 1,
|
|
"model": "serializers.article",
|
|
"fields": {
|
|
"author": 1,
|
|
"headline": "Unknown many to many",
|
|
"pub_date": "2014-09-15T10:35:00",
|
|
"meta_data": [
|
|
["author", "meta1"],
|
|
["doesnotexist", "meta1"],
|
|
["author", "meta1"]
|
|
]
|
|
}
|
|
}, {
|
|
"pk": 1,
|
|
"model": "serializers.author",
|
|
"fields": {
|
|
"name": "Agnes"
|
|
}
|
|
}]"""
|
|
key = ["doesnotexist", "meta1"]
|
|
expected = "(serializers.article:pk=1) field_value was '%r'" % key
|
|
with self.assertRaisesMessage(serializers.base.DeserializationError, expected):
|
|
for obj in serializers.deserialize('json', test_string):
|
|
obj.save()
|
|
|
|
def test_helpful_error_message_for_many2many_natural2(self):
|
|
"""
|
|
Invalid many-to-many keys should throw a helpful error message. This
|
|
tests the code path where a natural many-to-many key has only a single
|
|
value.
|
|
"""
|
|
test_string = """[{
|
|
"pk": 1,
|
|
"model": "serializers.article",
|
|
"fields": {
|
|
"author": 1,
|
|
"headline": "Unknown many to many",
|
|
"pub_date": "2014-09-15T10:35:00",
|
|
"meta_data": [1, "doesnotexist"]
|
|
}
|
|
}, {
|
|
"pk": 1,
|
|
"model": "serializers.categorymetadata",
|
|
"fields": {
|
|
"kind": "author",
|
|
"name": "meta1",
|
|
"value": "Agnes"
|
|
}
|
|
}, {
|
|
"pk": 1,
|
|
"model": "serializers.author",
|
|
"fields": {
|
|
"name": "Agnes"
|
|
}
|
|
}]"""
|
|
expected = "(serializers.article:pk=1) field_value was 'doesnotexist'"
|
|
with self.assertRaisesMessage(serializers.base.DeserializationError, expected):
|
|
for obj in serializers.deserialize('json', test_string, ignore=False):
|
|
obj.save()
|
|
|
|
|
|
class JsonSerializerTransactionTestCase(SerializersTransactionTestBase, TransactionTestCase):
|
|
serializer_name = "json"
|
|
fwd_ref_str = """[
|
|
{
|
|
"pk": 1,
|
|
"model": "serializers.article",
|
|
"fields": {
|
|
"headline": "Forward references pose no problem",
|
|
"pub_date": "2006-06-16T15:00:00",
|
|
"categories": [1],
|
|
"author": 1
|
|
}
|
|
},
|
|
{
|
|
"pk": 1,
|
|
"model": "serializers.category",
|
|
"fields": {
|
|
"name": "Reference"
|
|
}
|
|
},
|
|
{
|
|
"pk": 1,
|
|
"model": "serializers.author",
|
|
"fields": {
|
|
"name": "Agnes"
|
|
}
|
|
}]"""
|