django/tests/postgres_tests/test_json.py

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import datetime
import uuid
from decimal import Decimal
from django.core import exceptions, serializers
from django.core.serializers.json import DjangoJSONEncoder
from django.forms import CharField, Form, widgets
from django.utils.html import escape
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from . import PostgreSQLTestCase
from .models import JSONModel
try:
from django.contrib.postgres import forms
from django.contrib.postgres.fields import JSONField
except ImportError:
pass
class TestSaveLoad(PostgreSQLTestCase):
def test_null(self):
instance = JSONModel()
instance.save()
loaded = JSONModel.objects.get()
self.assertIsNone(loaded.field)
def test_empty_object(self):
instance = JSONModel(field={})
instance.save()
loaded = JSONModel.objects.get()
self.assertEqual(loaded.field, {})
def test_empty_list(self):
instance = JSONModel(field=[])
instance.save()
loaded = JSONModel.objects.get()
self.assertEqual(loaded.field, [])
def test_boolean(self):
instance = JSONModel(field=True)
instance.save()
loaded = JSONModel.objects.get()
self.assertIs(loaded.field, True)
def test_string(self):
instance = JSONModel(field='why?')
instance.save()
loaded = JSONModel.objects.get()
self.assertEqual(loaded.field, 'why?')
def test_number(self):
instance = JSONModel(field=1)
instance.save()
loaded = JSONModel.objects.get()
self.assertEqual(loaded.field, 1)
def test_realistic_object(self):
obj = {
'a': 'b',
'c': 1,
'd': ['e', {'f': 'g'}],
'h': True,
'i': False,
'j': None,
}
instance = JSONModel(field=obj)
instance.save()
loaded = JSONModel.objects.get()
self.assertEqual(loaded.field, obj)
def test_custom_encoding(self):
"""
JSONModel.field_custom has a custom DjangoJSONEncoder.
"""
some_uuid = uuid.uuid4()
obj_before = {
'date': datetime.date(2016, 8, 12),
'datetime': datetime.datetime(2016, 8, 12, 13, 44, 47, 575981),
'decimal': Decimal('10.54'),
'uuid': some_uuid,
}
obj_after = {
'date': '2016-08-12',
'datetime': '2016-08-12T13:44:47.575',
'decimal': '10.54',
'uuid': str(some_uuid),
}
JSONModel.objects.create(field_custom=obj_before)
loaded = JSONModel.objects.get()
self.assertEqual(loaded.field_custom, obj_after)
class TestQuerying(PostgreSQLTestCase):
@classmethod
def setUpTestData(cls):
cls.objs = [
JSONModel.objects.create(field=None),
JSONModel.objects.create(field=True),
JSONModel.objects.create(field=False),
JSONModel.objects.create(field='yes'),
JSONModel.objects.create(field=7),
JSONModel.objects.create(field=[]),
JSONModel.objects.create(field={}),
JSONModel.objects.create(field={
'a': 'b',
'c': 1,
}),
JSONModel.objects.create(field={
'a': 'b',
'c': 1,
'd': ['e', {'f': 'g'}],
'h': True,
'i': False,
'j': None,
'k': {'l': 'm'},
}),
JSONModel.objects.create(field=[1, [2]]),
JSONModel.objects.create(field={
'k': True,
'l': False,
}),
JSONModel.objects.create(field={'foo': 'bar'}),
]
def test_exact(self):
self.assertSequenceEqual(
JSONModel.objects.filter(field__exact={}),
[self.objs[6]]
)
def test_exact_complex(self):
self.assertSequenceEqual(
JSONModel.objects.filter(field__exact={'a': 'b', 'c': 1}),
[self.objs[7]]
)
def test_isnull(self):
self.assertSequenceEqual(
JSONModel.objects.filter(field__isnull=True),
[self.objs[0]]
)
def test_isnull_key(self):
# key__isnull works the same as has_key='key'.
self.assertSequenceEqual(
JSONModel.objects.filter(field__a__isnull=True),
self.objs[:7] + self.objs[9:]
)
self.assertSequenceEqual(
JSONModel.objects.filter(field__a__isnull=False),
[self.objs[7], self.objs[8]]
)
def test_contains(self):
self.assertSequenceEqual(
JSONModel.objects.filter(field__contains={'a': 'b'}),
[self.objs[7], self.objs[8]]
)
def test_contained_by(self):
self.assertSequenceEqual(
JSONModel.objects.filter(field__contained_by={'a': 'b', 'c': 1, 'h': True}),
[self.objs[6], self.objs[7]]
)
def test_has_key(self):
self.assertSequenceEqual(
JSONModel.objects.filter(field__has_key='a'),
[self.objs[7], self.objs[8]]
)
def test_has_keys(self):
self.assertSequenceEqual(
JSONModel.objects.filter(field__has_keys=['a', 'c', 'h']),
[self.objs[8]]
)
def test_has_any_keys(self):
self.assertSequenceEqual(
JSONModel.objects.filter(field__has_any_keys=['c', 'l']),
[self.objs[7], self.objs[8], self.objs[10]]
)
def test_shallow_list_lookup(self):
self.assertSequenceEqual(
JSONModel.objects.filter(field__0=1),
[self.objs[9]]
)
def test_shallow_obj_lookup(self):
self.assertSequenceEqual(
JSONModel.objects.filter(field__a='b'),
[self.objs[7], self.objs[8]]
)
def test_deep_lookup_objs(self):
self.assertSequenceEqual(
JSONModel.objects.filter(field__k__l='m'),
[self.objs[8]]
)
def test_shallow_lookup_obj_target(self):
self.assertSequenceEqual(
JSONModel.objects.filter(field__k={'l': 'm'}),
[self.objs[8]]
)
def test_deep_lookup_array(self):
self.assertSequenceEqual(
JSONModel.objects.filter(field__1__0=2),
[self.objs[9]]
)
def test_deep_lookup_mixed(self):
self.assertSequenceEqual(
JSONModel.objects.filter(field__d__1__f='g'),
[self.objs[8]]
)
def test_deep_lookup_transform(self):
self.assertSequenceEqual(
JSONModel.objects.filter(field__c__gt=1),
[]
)
self.assertSequenceEqual(
JSONModel.objects.filter(field__c__lt=5),
[self.objs[7], self.objs[8]]
)
def test_usage_in_subquery(self):
self.assertSequenceEqual(
JSONModel.objects.filter(id__in=JSONModel.objects.filter(field__c=1)),
self.objs[7:9]
)
def test_iexact(self):
self.assertTrue(JSONModel.objects.filter(field__foo__iexact='BaR').exists())
self.assertFalse(JSONModel.objects.filter(field__foo__iexact='"BaR"').exists())
def test_icontains(self):
self.assertFalse(JSONModel.objects.filter(field__foo__icontains='"bar"').exists())
def test_startswith(self):
self.assertTrue(JSONModel.objects.filter(field__foo__startswith='b').exists())
def test_istartswith(self):
self.assertTrue(JSONModel.objects.filter(field__foo__istartswith='B').exists())
def test_endswith(self):
self.assertTrue(JSONModel.objects.filter(field__foo__endswith='r').exists())
def test_iendswith(self):
self.assertTrue(JSONModel.objects.filter(field__foo__iendswith='R').exists())
def test_regex(self):
self.assertTrue(JSONModel.objects.filter(field__foo__regex=r'^bar$').exists())
def test_iregex(self):
self.assertTrue(JSONModel.objects.filter(field__foo__iregex=r'^bAr$').exists())
class TestSerialization(PostgreSQLTestCase):
test_data = (
'[{"fields": {"field": {"a": "b", "c": null}, "field_custom": null}, '
'"model": "postgres_tests.jsonmodel", "pk": null}]'
)
def test_dumping(self):
instance = JSONModel(field={'a': 'b', 'c': None})
data = serializers.serialize('json', [instance])
self.assertJSONEqual(data, self.test_data)
def test_loading(self):
instance = list(serializers.deserialize('json', self.test_data))[0].object
self.assertEqual(instance.field, {'a': 'b', 'c': None})
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class TestValidation(PostgreSQLTestCase):
def test_not_serializable(self):
field = JSONField()
with self.assertRaises(exceptions.ValidationError) as cm:
field.clean(datetime.timedelta(days=1), None)
self.assertEqual(cm.exception.code, 'invalid')
self.assertEqual(cm.exception.message % cm.exception.params, "Value must be valid JSON.")
def test_custom_encoder(self):
with self.assertRaisesMessage(ValueError, "The encoder parameter must be a callable object."):
field = JSONField(encoder=DjangoJSONEncoder())
field = JSONField(encoder=DjangoJSONEncoder)
self.assertEqual(field.clean(datetime.timedelta(days=1), None), datetime.timedelta(days=1))
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class TestFormField(PostgreSQLTestCase):
def test_valid(self):
field = forms.JSONField()
value = field.clean('{"a": "b"}')
self.assertEqual(value, {'a': 'b'})
def test_valid_empty(self):
field = forms.JSONField(required=False)
value = field.clean('')
self.assertIsNone(value)
def test_invalid(self):
field = forms.JSONField()
with self.assertRaises(exceptions.ValidationError) as cm:
field.clean('{some badly formed: json}')
self.assertEqual(cm.exception.messages[0], "'{some badly formed: json}' value must be valid JSON.")
def test_formfield(self):
model_field = JSONField()
form_field = model_field.formfield()
self.assertIsInstance(form_field, forms.JSONField)
def test_formfield_disabled(self):
class JsonForm(Form):
name = CharField()
jfield = forms.JSONField(disabled=True)
form = JsonForm({'name': 'xyz', 'jfield': '["bar"]'}, initial={'jfield': ['foo']})
self.assertIn('[&quot;foo&quot;]</textarea>', form.as_p())
def test_prepare_value(self):
field = forms.JSONField()
self.assertEqual(field.prepare_value({'a': 'b'}), '{"a": "b"}')
self.assertEqual(field.prepare_value(None), 'null')
self.assertEqual(field.prepare_value('foo'), '"foo"')
def test_redisplay_wrong_input(self):
"""
When displaying a bound form (typically due to invalid input), the form
should not overquote JSONField inputs.
"""
class JsonForm(Form):
name = CharField(max_length=2)
jfield = forms.JSONField()
# JSONField input is fine, name is too long
form = JsonForm({'name': 'xyz', 'jfield': '["foo"]'})
self.assertIn('[&quot;foo&quot;]</textarea>', form.as_p())
# This time, the JSONField input is wrong
form = JsonForm({'name': 'xy', 'jfield': '{"foo"}'})
# Appears once in the textarea and once in the error message
self.assertEqual(form.as_p().count(escape('{"foo"}')), 2)
def test_widget(self):
"""The default widget of a JSONField is a Textarea."""
field = forms.JSONField()
self.assertIsInstance(field.widget, widgets.Textarea)
def test_custom_widget_kwarg(self):
"""The widget can be overridden with a kwarg."""
field = forms.JSONField(widget=widgets.Input)
self.assertIsInstance(field.widget, widgets.Input)
def test_custom_widget_attribute(self):
"""The widget can be overridden with an attribute."""
class CustomJSONField(forms.JSONField):
widget = widgets.Input
field = CustomJSONField()
self.assertIsInstance(field.widget, widgets.Input)
def test_already_converted_value(self):
field = forms.JSONField(required=False)
tests = [
'["a", "b", "c"]', '{"a": 1, "b": 2}', '1', '1.5', '"foo"',
'true', 'false', 'null',
]
for json_string in tests:
val = field.clean(json_string)
self.assertEqual(field.clean(val), val)