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440 lines
17 KiB
Python
440 lines
17 KiB
Python
import pickle
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from django import forms
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from django.core.exceptions import ValidationError
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from django.db import models
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from django.test import SimpleTestCase, TestCase
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from django.utils.choices import CallableChoiceIterator
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from django.utils.functional import lazy
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from .models import (
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Bar,
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Choiceful,
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Foo,
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RenamedField,
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VerboseNameField,
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Whiz,
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WhizDelayed,
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WhizIter,
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WhizIterEmpty,
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)
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class Nested:
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class Field(models.Field):
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pass
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class BasicFieldTests(SimpleTestCase):
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def test_show_hidden_initial(self):
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"""
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Fields with choices respect show_hidden_initial as a kwarg to
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formfield().
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"""
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choices = [(0, 0), (1, 1)]
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model_field = models.Field(choices=choices)
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form_field = model_field.formfield(show_hidden_initial=True)
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self.assertTrue(form_field.show_hidden_initial)
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form_field = model_field.formfield(show_hidden_initial=False)
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self.assertFalse(form_field.show_hidden_initial)
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def test_field_repr(self):
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"""
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__repr__() of a field displays its name.
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"""
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f = Foo._meta.get_field("a")
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self.assertEqual(repr(f), "<django.db.models.fields.CharField: a>")
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f = models.fields.CharField()
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self.assertEqual(repr(f), "<django.db.models.fields.CharField>")
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def test_field_repr_nested(self):
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"""__repr__() uses __qualname__ for nested class support."""
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self.assertEqual(repr(Nested.Field()), "<model_fields.tests.Nested.Field>")
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def test_field_name(self):
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"""
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A defined field name (name="fieldname") is used instead of the model
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model's attribute name (modelname).
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"""
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instance = RenamedField()
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self.assertTrue(hasattr(instance, "get_fieldname_display"))
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self.assertFalse(hasattr(instance, "get_modelname_display"))
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def test_field_verbose_name(self):
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m = VerboseNameField
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for i in range(1, 22):
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self.assertEqual(
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m._meta.get_field("field%d" % i).verbose_name, "verbose field%d" % i
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)
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self.assertEqual(m._meta.get_field("id").verbose_name, "verbose pk")
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def test_choices_form_class(self):
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"""Can supply a custom choices form class to Field.formfield()"""
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choices = [("a", "a")]
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field = models.CharField(choices=choices)
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klass = forms.TypedMultipleChoiceField
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self.assertIsInstance(field.formfield(choices_form_class=klass), klass)
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def test_formfield_disabled(self):
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"""Field.formfield() sets disabled for fields with choices."""
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field = models.CharField(choices=[("a", "b")])
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form_field = field.formfield(disabled=True)
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self.assertIs(form_field.disabled, True)
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def test_field_str(self):
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f = models.Field()
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self.assertEqual(str(f), "<django.db.models.fields.Field>")
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f = Foo._meta.get_field("a")
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self.assertEqual(str(f), "model_fields.Foo.a")
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def test_field_ordering(self):
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"""Fields are ordered based on their creation."""
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f1 = models.Field()
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f2 = models.Field(auto_created=True)
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f3 = models.Field()
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self.assertLess(f2, f1)
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self.assertGreater(f3, f1)
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self.assertIsNotNone(f1)
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self.assertNotIn(f2, (None, 1, ""))
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def test_field_instance_is_picklable(self):
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"""Field instances can be pickled."""
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field = models.Field(max_length=100, default="a string")
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# Must be picklable with this cached property populated (#28188).
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field._get_default
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pickle.dumps(field)
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def test_deconstruct_nested_field(self):
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"""deconstruct() uses __qualname__ for nested class support."""
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name, path, args, kwargs = Nested.Field().deconstruct()
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self.assertEqual(path, "model_fields.tests.Nested.Field")
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def test_abstract_inherited_fields(self):
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"""Field instances from abstract models are not equal."""
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class AbstractModel(models.Model):
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field = models.IntegerField()
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class Meta:
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abstract = True
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class InheritAbstractModel1(AbstractModel):
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pass
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class InheritAbstractModel2(AbstractModel):
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pass
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abstract_model_field = AbstractModel._meta.get_field("field")
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inherit1_model_field = InheritAbstractModel1._meta.get_field("field")
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inherit2_model_field = InheritAbstractModel2._meta.get_field("field")
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self.assertNotEqual(abstract_model_field, inherit1_model_field)
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self.assertNotEqual(abstract_model_field, inherit2_model_field)
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self.assertNotEqual(inherit1_model_field, inherit2_model_field)
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self.assertLess(abstract_model_field, inherit1_model_field)
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self.assertLess(abstract_model_field, inherit2_model_field)
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self.assertLess(inherit1_model_field, inherit2_model_field)
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def test_hash_immutability(self):
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field = models.IntegerField()
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field_hash = hash(field)
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class MyModel(models.Model):
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rank = field
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self.assertEqual(field_hash, hash(field))
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class ChoicesTests(SimpleTestCase):
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@classmethod
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def setUpClass(cls):
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super().setUpClass()
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cls.no_choices = Choiceful._meta.get_field("no_choices")
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cls.empty_choices = Choiceful._meta.get_field("empty_choices")
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cls.empty_choices_bool = Choiceful._meta.get_field("empty_choices_bool")
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cls.empty_choices_text = Choiceful._meta.get_field("empty_choices_text")
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cls.with_choices = Choiceful._meta.get_field("with_choices")
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cls.with_choices_dict = Choiceful._meta.get_field("with_choices_dict")
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cls.with_choices_nested_dict = Choiceful._meta.get_field(
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"with_choices_nested_dict"
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)
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cls.choices_from_enum = Choiceful._meta.get_field("choices_from_enum")
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cls.choices_from_iterator = Choiceful._meta.get_field("choices_from_iterator")
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cls.choices_from_callable = Choiceful._meta.get_field("choices_from_callable")
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def test_choices(self):
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self.assertIsNone(self.no_choices.choices)
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self.assertEqual(self.empty_choices.choices, [])
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self.assertEqual(self.empty_choices_bool.choices, [])
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self.assertEqual(self.empty_choices_text.choices, [])
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self.assertEqual(self.with_choices.choices, [(1, "A")])
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self.assertEqual(self.with_choices_dict.choices, [(1, "A")])
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self.assertEqual(self.with_choices_nested_dict.choices, [("Thing", [(1, "A")])])
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self.assertEqual(
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self.choices_from_iterator.choices, [(0, "0"), (1, "1"), (2, "2")]
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)
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self.assertIsInstance(
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self.choices_from_callable.choices, CallableChoiceIterator
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)
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self.assertEqual(
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self.choices_from_callable.choices.func(), [(0, "0"), (1, "1"), (2, "2")]
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)
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def test_choices_slice(self):
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for choices, expected_slice in [
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(self.empty_choices.choices, []),
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(self.empty_choices_bool.choices, []),
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(self.empty_choices_text.choices, []),
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(self.with_choices.choices, [(1, "A")]),
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(self.with_choices_dict.choices, [(1, "A")]),
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(self.with_choices_nested_dict.choices, [("Thing", [(1, "A")])]),
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(self.choices_from_iterator.choices, [(0, "0"), (1, "1")]),
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(self.choices_from_callable.choices.func(), [(0, "0"), (1, "1")]),
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(self.choices_from_callable.choices, [(0, "0"), (1, "1")]),
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]:
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with self.subTest(choices=choices):
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self.assertEqual(choices[:2], expected_slice)
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def test_choices_negative_index(self):
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for choices, expected_choice in [
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(self.with_choices.choices, (1, "A")),
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(self.with_choices_dict.choices, (1, "A")),
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(self.with_choices_nested_dict.choices, ("Thing", [(1, "A")])),
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(self.choices_from_iterator.choices, (2, "2")),
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(self.choices_from_callable.choices.func(), (2, "2")),
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(self.choices_from_callable.choices, (2, "2")),
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]:
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with self.subTest(choices=choices):
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self.assertEqual(choices[-1], expected_choice)
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def test_flatchoices(self):
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self.assertEqual(self.no_choices.flatchoices, [])
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self.assertEqual(self.empty_choices.flatchoices, [])
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self.assertEqual(self.empty_choices_bool.flatchoices, [])
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self.assertEqual(self.empty_choices_text.flatchoices, [])
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self.assertEqual(self.with_choices.flatchoices, [(1, "A")])
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self.assertEqual(self.with_choices_dict.flatchoices, [(1, "A")])
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self.assertEqual(self.with_choices_nested_dict.flatchoices, [(1, "A")])
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self.assertEqual(
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self.choices_from_iterator.flatchoices, [(0, "0"), (1, "1"), (2, "2")]
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)
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self.assertEqual(
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self.choices_from_callable.flatchoices, [(0, "0"), (1, "1"), (2, "2")]
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)
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def test_check(self):
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self.assertEqual(Choiceful.check(), [])
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def test_invalid_choice(self):
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model_instance = None # Actual model instance not needed.
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self.no_choices.validate(0, model_instance)
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msg = "['Value 99 is not a valid choice.']"
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with self.assertRaisesMessage(ValidationError, msg):
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self.empty_choices.validate(99, model_instance)
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with self.assertRaisesMessage(ValidationError, msg):
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self.with_choices.validate(99, model_instance)
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def test_formfield(self):
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no_choices_formfield = self.no_choices.formfield()
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self.assertIsInstance(no_choices_formfield, forms.IntegerField)
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fields = (
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self.empty_choices,
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self.empty_choices_bool,
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self.empty_choices_text,
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self.with_choices,
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self.with_choices_dict,
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self.with_choices_nested_dict,
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self.choices_from_enum,
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self.choices_from_iterator,
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self.choices_from_callable,
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)
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for field in fields:
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with self.subTest(field=field):
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self.assertIsInstance(field.formfield(), forms.ChoiceField)
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def test_choices_from_enum(self):
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# Choices class was transparently resolved when given as argument.
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self.assertEqual(self.choices_from_enum.choices, Choiceful.Suit.choices)
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self.assertEqual(self.choices_from_enum.flatchoices, Choiceful.Suit.choices)
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class GetFieldDisplayTests(SimpleTestCase):
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def test_choices_and_field_display(self):
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"""
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get_choices() interacts with get_FIELD_display() to return the expected
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values.
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"""
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self.assertEqual(Whiz(c=1).get_c_display(), "First") # A nested value
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self.assertEqual(Whiz(c=0).get_c_display(), "Other") # A top level value
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self.assertEqual(Whiz(c=9).get_c_display(), 9) # Invalid value
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self.assertIsNone(Whiz(c=None).get_c_display()) # Blank value
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self.assertEqual(Whiz(c="").get_c_display(), "") # Empty value
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self.assertEqual(WhizDelayed(c=0).get_c_display(), "Other") # Delayed choices
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def test_get_FIELD_display_translated(self):
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"""A translated display value is coerced to str."""
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val = Whiz(c=5).get_c_display()
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self.assertIsInstance(val, str)
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self.assertEqual(val, "translated")
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def test_overriding_FIELD_display(self):
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class FooBar(models.Model):
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foo_bar = models.IntegerField(choices=[(1, "foo"), (2, "bar")])
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def get_foo_bar_display(self):
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return "something"
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f = FooBar(foo_bar=1)
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self.assertEqual(f.get_foo_bar_display(), "something")
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def test_overriding_inherited_FIELD_display(self):
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class Base(models.Model):
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foo = models.CharField(max_length=254, choices=[("A", "Base A")])
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class Meta:
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abstract = True
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class Child(Base):
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foo = models.CharField(
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max_length=254, choices=[("A", "Child A"), ("B", "Child B")]
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)
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self.assertEqual(Child(foo="A").get_foo_display(), "Child A")
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self.assertEqual(Child(foo="B").get_foo_display(), "Child B")
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def test_iterator_choices(self):
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"""
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get_choices() works with Iterators.
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"""
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self.assertEqual(WhizIter(c=1).c, 1) # A nested value
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self.assertEqual(WhizIter(c=9).c, 9) # Invalid value
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self.assertIsNone(WhizIter(c=None).c) # Blank value
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self.assertEqual(WhizIter(c="").c, "") # Empty value
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def test_empty_iterator_choices(self):
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"""
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get_choices() works with empty iterators.
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"""
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self.assertEqual(WhizIterEmpty(c="a").c, "a") # A nested value
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self.assertEqual(WhizIterEmpty(c="b").c, "b") # Invalid value
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self.assertIsNone(WhizIterEmpty(c=None).c) # Blank value
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self.assertEqual(WhizIterEmpty(c="").c, "") # Empty value
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class GetChoicesTests(SimpleTestCase):
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def test_empty_choices(self):
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choices = []
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f = models.CharField(choices=choices)
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self.assertEqual(f.get_choices(include_blank=False), choices)
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def test_blank_in_choices(self):
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choices = [("", "<><>"), ("a", "A")]
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f = models.CharField(choices=choices)
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self.assertEqual(f.get_choices(include_blank=True), choices)
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def test_blank_in_grouped_choices(self):
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choices = [
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("f", "Foo"),
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("b", "Bar"),
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(
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"Group",
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[
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("", "No Preference"),
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("fg", "Foo"),
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("bg", "Bar"),
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],
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),
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]
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f = models.CharField(choices=choices)
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self.assertEqual(f.get_choices(include_blank=True), choices)
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def test_lazy_strings_not_evaluated(self):
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lazy_func = lazy(lambda x: 0 / 0, int) # raises ZeroDivisionError if evaluated.
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f = models.CharField(choices=[(lazy_func("group"), [("a", "A"), ("b", "B")])])
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self.assertEqual(f.get_choices(include_blank=True)[0], ("", "---------"))
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class GetChoicesOrderingTests(TestCase):
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@classmethod
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def setUpTestData(cls):
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cls.foo1 = Foo.objects.create(a="a", d="12.35")
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cls.foo2 = Foo.objects.create(a="b", d="12.34")
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cls.bar1 = Bar.objects.create(a=cls.foo1, b="b")
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cls.bar2 = Bar.objects.create(a=cls.foo2, b="a")
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cls.field = Bar._meta.get_field("a")
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def assertChoicesEqual(self, choices, objs):
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self.assertEqual(choices, [(obj.pk, str(obj)) for obj in objs])
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def test_get_choices(self):
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self.assertChoicesEqual(
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self.field.get_choices(include_blank=False, ordering=("a",)),
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[self.foo1, self.foo2],
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)
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self.assertChoicesEqual(
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self.field.get_choices(include_blank=False, ordering=("-a",)),
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[self.foo2, self.foo1],
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)
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def test_get_choices_default_ordering(self):
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self.addCleanup(setattr, Foo._meta, "ordering", Foo._meta.ordering)
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Foo._meta.ordering = ("d",)
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self.assertChoicesEqual(
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self.field.get_choices(include_blank=False), [self.foo2, self.foo1]
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)
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def test_get_choices_reverse_related_field(self):
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self.assertChoicesEqual(
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self.field.remote_field.get_choices(include_blank=False, ordering=("a",)),
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[self.bar1, self.bar2],
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)
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self.assertChoicesEqual(
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self.field.remote_field.get_choices(include_blank=False, ordering=("-a",)),
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[self.bar2, self.bar1],
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)
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def test_get_choices_reverse_related_field_default_ordering(self):
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self.addCleanup(setattr, Bar._meta, "ordering", Bar._meta.ordering)
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Bar._meta.ordering = ("b",)
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self.assertChoicesEqual(
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self.field.remote_field.get_choices(include_blank=False),
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[self.bar2, self.bar1],
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)
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class GetChoicesLimitChoicesToTests(TestCase):
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@classmethod
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def setUpTestData(cls):
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cls.foo1 = Foo.objects.create(a="a", d="12.34")
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cls.foo2 = Foo.objects.create(a="b", d="12.34")
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cls.bar1 = Bar.objects.create(a=cls.foo1, b="b")
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cls.bar2 = Bar.objects.create(a=cls.foo2, b="a")
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cls.field = Bar._meta.get_field("a")
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def assertChoicesEqual(self, choices, objs):
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self.assertCountEqual(choices, [(obj.pk, str(obj)) for obj in objs])
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def test_get_choices(self):
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self.assertChoicesEqual(
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self.field.get_choices(include_blank=False, limit_choices_to={"a": "a"}),
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[self.foo1],
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)
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self.assertChoicesEqual(
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self.field.get_choices(include_blank=False, limit_choices_to={}),
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[self.foo1, self.foo2],
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)
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def test_get_choices_reverse_related_field(self):
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field = self.field.remote_field
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self.assertChoicesEqual(
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field.get_choices(include_blank=False, limit_choices_to={"b": "b"}),
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[self.bar1],
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)
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self.assertChoicesEqual(
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field.get_choices(include_blank=False, limit_choices_to={}),
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[self.bar1, self.bar2],
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)
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