mirror of
https://github.com/django/django.git
synced 2025-04-15 12:54:38 +00:00
Revert "[1.7.x] Fixed #23938 -- Added migration support for m2m to concrete fields and vice versa"
This reverts commit 1702bc52cc20ed0729893177fc8f4391b4b3183c. This doesn't work on stable/1.7.x because #23844 wasn't backported and we're not willing to do so because it's a large change.
This commit is contained in:
Tim Graham
parent
1702bc52cc
commit
79645529e7
@ -778,71 +778,73 @@ class MigrationAutodetector(object):
|
||||
Fields that have been added
|
||||
"""
|
||||
for app_label, model_name, field_name in sorted(self.new_field_keys - self.old_field_keys):
|
||||
self._generate_added_field(app_label, model_name, field_name)
|
||||
|
||||
def _generate_added_field(self, app_label, model_name, field_name):
|
||||
field = self.new_apps.get_model(app_label, model_name)._meta.get_field_by_name(field_name)[0]
|
||||
# Fields that are foreignkeys/m2ms depend on stuff
|
||||
dependencies = []
|
||||
if field.rel and field.rel.to:
|
||||
# Account for FKs to swappable models
|
||||
swappable_setting = getattr(field, 'swappable_setting', None)
|
||||
if swappable_setting is not None:
|
||||
dep_app_label = "__setting__"
|
||||
dep_object_name = swappable_setting
|
||||
field = self.new_apps.get_model(app_label, model_name)._meta.get_field_by_name(field_name)[0]
|
||||
# Fields that are foreignkeys/m2ms depend on stuff
|
||||
dependencies = []
|
||||
if field.rel and field.rel.to:
|
||||
# Account for FKs to swappable models
|
||||
swappable_setting = getattr(field, 'swappable_setting', None)
|
||||
if swappable_setting is not None:
|
||||
dep_app_label = "__setting__"
|
||||
dep_object_name = swappable_setting
|
||||
else:
|
||||
dep_app_label = field.rel.to._meta.app_label
|
||||
dep_object_name = field.rel.to._meta.object_name
|
||||
dependencies = [(dep_app_label, dep_object_name, None, True)]
|
||||
if getattr(field.rel, "through", None) and not field.rel.through._meta.auto_created:
|
||||
dependencies.append((
|
||||
field.rel.through._meta.app_label,
|
||||
field.rel.through._meta.object_name,
|
||||
None,
|
||||
True
|
||||
))
|
||||
# You can't just add NOT NULL fields with no default or fields
|
||||
# which don't allow empty strings as default.
|
||||
if (not field.null and not field.has_default() and
|
||||
not isinstance(field, models.ManyToManyField) and
|
||||
not (field.blank and field.empty_strings_allowed)):
|
||||
field = field.clone()
|
||||
field.default = self.questioner.ask_not_null_addition(field_name, model_name)
|
||||
self.add_operation(
|
||||
app_label,
|
||||
operations.AddField(
|
||||
model_name=model_name,
|
||||
name=field_name,
|
||||
field=field,
|
||||
preserve_default=False,
|
||||
),
|
||||
dependencies=dependencies,
|
||||
)
|
||||
else:
|
||||
dep_app_label = field.rel.to._meta.app_label
|
||||
dep_object_name = field.rel.to._meta.object_name
|
||||
dependencies = [(dep_app_label, dep_object_name, None, True)]
|
||||
if getattr(field.rel, "through", None) and not field.rel.through._meta.auto_created:
|
||||
dependencies.append((
|
||||
field.rel.through._meta.app_label,
|
||||
field.rel.through._meta.object_name,
|
||||
None,
|
||||
True,
|
||||
))
|
||||
# You can't just add NOT NULL fields with no default or fields
|
||||
# which don't allow empty strings as default.
|
||||
preserve_default = True
|
||||
if (not field.null and not field.has_default() and
|
||||
not isinstance(field, models.ManyToManyField) and
|
||||
not (field.blank and field.empty_strings_allowed)):
|
||||
field = field.clone()
|
||||
field.default = self.questioner.ask_not_null_addition(field_name, model_name)
|
||||
preserve_default = False
|
||||
self.add_operation(
|
||||
app_label,
|
||||
operations.AddField(
|
||||
model_name=model_name,
|
||||
name=field_name,
|
||||
field=field,
|
||||
preserve_default=preserve_default,
|
||||
),
|
||||
dependencies=dependencies,
|
||||
)
|
||||
self.add_operation(
|
||||
app_label,
|
||||
operations.AddField(
|
||||
model_name=model_name,
|
||||
name=field_name,
|
||||
field=field,
|
||||
),
|
||||
dependencies=dependencies,
|
||||
)
|
||||
|
||||
def generate_removed_fields(self):
|
||||
"""
|
||||
Fields that have been removed.
|
||||
"""
|
||||
for app_label, model_name, field_name in sorted(self.old_field_keys - self.new_field_keys):
|
||||
self._generate_removed_field(app_label, model_name, field_name)
|
||||
|
||||
def _generate_removed_field(self, app_label, model_name, field_name):
|
||||
self.add_operation(
|
||||
app_label,
|
||||
operations.RemoveField(
|
||||
model_name=model_name,
|
||||
name=field_name,
|
||||
),
|
||||
# We might need to depend on the removal of an
|
||||
# order_with_respect_to or index/unique_together operation;
|
||||
# this is safely ignored if there isn't one
|
||||
dependencies=[
|
||||
(app_label, model_name, field_name, "order_wrt_unset"),
|
||||
(app_label, model_name, field_name, "foo_together_change"),
|
||||
],
|
||||
)
|
||||
self.add_operation(
|
||||
app_label,
|
||||
operations.RemoveField(
|
||||
model_name=model_name,
|
||||
name=field_name,
|
||||
),
|
||||
# We might need to depend on the removal of an
|
||||
# order_with_respect_to or index/unique_together operation;
|
||||
# this is safely ignored if there isn't one
|
||||
dependencies=[
|
||||
(app_label, model_name, field_name, "order_wrt_unset"),
|
||||
(app_label, model_name, field_name, "foo_together_change"),
|
||||
],
|
||||
)
|
||||
|
||||
def generate_altered_fields(self):
|
||||
"""
|
||||
@ -866,30 +868,25 @@ class MigrationAutodetector(object):
|
||||
old_field_dec = self.deep_deconstruct(old_field)
|
||||
new_field_dec = self.deep_deconstruct(new_field)
|
||||
if old_field_dec != new_field_dec:
|
||||
if (not isinstance(old_field, models.ManyToManyField) and
|
||||
preserve_default = True
|
||||
if (old_field.null and not new_field.null and not new_field.has_default() and
|
||||
not isinstance(new_field, models.ManyToManyField)):
|
||||
preserve_default = True
|
||||
if (old_field.null and not new_field.null and not new_field.has_default() and
|
||||
not isinstance(new_field, models.ManyToManyField)):
|
||||
field = new_field.clone()
|
||||
new_default = self.questioner.ask_not_null_alteration(field_name, model_name)
|
||||
if new_default is not models.NOT_PROVIDED:
|
||||
field.default = new_default
|
||||
preserve_default = False
|
||||
else:
|
||||
field = new_field
|
||||
self.add_operation(
|
||||
app_label,
|
||||
operations.AlterField(
|
||||
model_name=model_name,
|
||||
name=field_name,
|
||||
field=field,
|
||||
preserve_default=preserve_default,
|
||||
)
|
||||
)
|
||||
field = new_field.clone()
|
||||
new_default = self.questioner.ask_not_null_alteration(field_name, model_name)
|
||||
if new_default is not models.NOT_PROVIDED:
|
||||
field.default = new_default
|
||||
preserve_default = False
|
||||
else:
|
||||
self._generate_removed_field(app_label, model_name, field_name)
|
||||
self._generate_added_field(app_label, model_name, field_name)
|
||||
field = new_field
|
||||
self.add_operation(
|
||||
app_label,
|
||||
operations.AlterField(
|
||||
model_name=model_name,
|
||||
name=field_name,
|
||||
field=field,
|
||||
preserve_default=preserve_default,
|
||||
)
|
||||
)
|
||||
|
||||
def _generate_altered_foo_together(self, operation):
|
||||
option_name = operation.option_name
|
||||
|
||||
@ -181,6 +181,3 @@ Bugfixes
|
||||
|
||||
* Supported strings escaped by third-party libraries with the ``__html__``
|
||||
convention in the template engine (:ticket:`23831`).
|
||||
|
||||
* Fixed a migration crash when changing a ``ManyToManyField`` into a concrete
|
||||
field and vice versa (:ticket:`23938`).
|
||||
|
||||
@ -116,10 +116,6 @@ class AutodetectorTests(TestCase):
|
||||
("id", models.AutoField(primary_key=True)),
|
||||
("publishers", models.ManyToManyField("testapp.Publisher", through="testapp.Contract")),
|
||||
])
|
||||
author_with_former_m2m = ModelState("testapp", "Author", [
|
||||
("id", models.AutoField(primary_key=True)),
|
||||
("publishers", models.CharField(max_length=100)),
|
||||
])
|
||||
author_with_options = ModelState("testapp", "Author", [
|
||||
("id", models.AutoField(primary_key=True)),
|
||||
], {
|
||||
@ -1278,39 +1274,6 @@ class AutodetectorTests(TestCase):
|
||||
self.assertOperationAttributes(changes, "testapp", 0, 3, name="publisher", model_name='contract')
|
||||
self.assertOperationAttributes(changes, "testapp", 0, 4, name="Contract")
|
||||
|
||||
def test_concrete_field_changed_to_many_to_many(self):
|
||||
"""
|
||||
#23938 - Tests that changing a concrete field into a ManyToManyField
|
||||
first removes the concrete field and then adds the m2m field.
|
||||
"""
|
||||
before = self.make_project_state([self.author_with_former_m2m])
|
||||
after = self.make_project_state([self.author_with_m2m, self.publisher])
|
||||
autodetector = MigrationAutodetector(before, after)
|
||||
changes = autodetector._detect_changes()
|
||||
# Right number/type of migrations?
|
||||
self.assertNumberMigrations(changes, "testapp", 1)
|
||||
self.assertOperationTypes(changes, "testapp", 0, ["CreateModel", "RemoveField", "AddField"])
|
||||
self.assertOperationAttributes(changes, 'testapp', 0, 0, name='Publisher')
|
||||
self.assertOperationAttributes(changes, 'testapp', 0, 1, name="publishers", model_name='author')
|
||||
self.assertOperationAttributes(changes, 'testapp', 0, 2, name="publishers", model_name='author')
|
||||
|
||||
def test_many_to_many_changed_to_concrete_field(self):
|
||||
"""
|
||||
#23938 - Tests that changing a ManyToManyField into a concrete field
|
||||
first removes the m2m field and then adds the concrete field.
|
||||
"""
|
||||
before = self.make_project_state([self.author_with_m2m, self.publisher])
|
||||
after = self.make_project_state([self.author_with_former_m2m])
|
||||
autodetector = MigrationAutodetector(before, after)
|
||||
changes = autodetector._detect_changes()
|
||||
# Right number/type of migrations?
|
||||
self.assertNumberMigrations(changes, "testapp", 1)
|
||||
self.assertOperationTypes(changes, "testapp", 0, ["RemoveField", "AddField", "DeleteModel"])
|
||||
self.assertOperationAttributes(changes, 'testapp', 0, 0, name="publishers", model_name='author')
|
||||
self.assertOperationAttributes(changes, 'testapp', 0, 1, name="publishers", model_name='author')
|
||||
self.assertOperationAttributes(changes, 'testapp', 0, 2, name='Publisher')
|
||||
self.assertOperationFieldAttributes(changes, 'testapp', 0, 1, max_length=100)
|
||||
|
||||
def test_non_circular_foreignkey_dependency_removal(self):
|
||||
"""
|
||||
If two models with a ForeignKey from one to the other are removed at the
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user