diff options
| -rw-r--r-- | django/db/migrations/operations/models.py | 90 |
1 files changed, 30 insertions, 60 deletions
diff --git a/django/db/migrations/operations/models.py b/django/db/migrations/operations/models.py index 8ae877b5fe..f286bf4ea4 100644 --- a/django/db/migrations/operations/models.py +++ b/django/db/migrations/operations/models.py @@ -491,22 +491,23 @@ class FieldRelatedOptionOperation(ModelOptionOperation): return super().reduce(operation, app_label=app_label) -class AlterUniqueTogether(FieldRelatedOptionOperation): - """ - Change the value of unique_together to the target one. - Input value of unique_together must be a set of tuples. - """ - option_name = "unique_together" +class AlterTogetherOptionOperation(FieldRelatedOptionOperation): + option_name = None - def __init__(self, name, unique_together): - unique_together = normalize_together(unique_together) - self.unique_together = {tuple(cons) for cons in unique_together} + def __init__(self, name, option_value): + if option_value: + option_value = set(normalize_together(option_value)) + setattr(self, self.option_name, option_value) super().__init__(name) + @cached_property + def option_value(self): + return getattr(self, self.option_name) + def deconstruct(self): kwargs = { 'name': self.name, - 'unique_together': self.unique_together, + self.option_name: self.option_value, } return ( self.__class__.__qualname__, @@ -516,14 +517,15 @@ class AlterUniqueTogether(FieldRelatedOptionOperation): def state_forwards(self, app_label, state): model_state = state.models[app_label, self.name_lower] - model_state.options[self.option_name] = self.unique_together + model_state.options[self.option_name] = self.option_value state.reload_model(app_label, self.name_lower, delay=True) def database_forwards(self, app_label, schema_editor, from_state, to_state): new_model = to_state.apps.get_model(app_label, self.name) if self.allow_migrate_model(schema_editor.connection.alias, new_model): old_model = from_state.apps.get_model(app_label, self.name) - schema_editor.alter_unique_together( + alter_together = getattr(schema_editor, 'alter_%s' % self.option_name) + alter_together( new_model, getattr(old_model._meta, self.option_name, set()), getattr(new_model._meta, self.option_name, set()), @@ -536,16 +538,27 @@ class AlterUniqueTogether(FieldRelatedOptionOperation): return ( self.references_model(model_name, app_label) and ( - not self.unique_together or - any((name in together) for together in self.unique_together) + not self.option_value or + any((name in fields) for fields in self.option_value) ) ) def describe(self): - return "Alter %s for %s (%s constraint(s))" % (self.option_name, self.name, len(self.unique_together or '')) + return "Alter %s for %s (%s constraint(s))" % (self.option_name, self.name, len(self.option_value or '')) + + +class AlterUniqueTogether(AlterTogetherOptionOperation): + """ + Change the value of unique_together to the target one. + Input value of unique_together must be a set of tuples. + """ + option_name = 'unique_together' + + def __init__(self, name, unique_together): + super().__init__(name, unique_together) -class AlterIndexTogether(FieldRelatedOptionOperation): +class AlterIndexTogether(AlterTogetherOptionOperation): """ Change the value of index_together to the target one. Input value of index_together must be a set of tuples. @@ -553,50 +566,7 @@ class AlterIndexTogether(FieldRelatedOptionOperation): option_name = "index_together" def __init__(self, name, index_together): - index_together = normalize_together(index_together) - self.index_together = {tuple(cons) for cons in index_together} - super().__init__(name) - - def deconstruct(self): - kwargs = { - 'name': self.name, - 'index_together': self.index_together, - } - return ( - self.__class__.__qualname__, - [], - kwargs - ) - - def state_forwards(self, app_label, state): - model_state = state.models[app_label, self.name_lower] - model_state.options[self.option_name] = self.index_together - state.reload_model(app_label, self.name_lower, delay=True) - - def database_forwards(self, app_label, schema_editor, from_state, to_state): - new_model = to_state.apps.get_model(app_label, self.name) - if self.allow_migrate_model(schema_editor.connection.alias, new_model): - old_model = from_state.apps.get_model(app_label, self.name) - schema_editor.alter_index_together( - new_model, - getattr(old_model._meta, self.option_name, set()), - getattr(new_model._meta, self.option_name, set()), - ) - - def database_backwards(self, app_label, schema_editor, from_state, to_state): - return self.database_forwards(app_label, schema_editor, from_state, to_state) - - def references_field(self, model_name, name, app_label=None): - return ( - self.references_model(model_name, app_label) and - ( - not self.index_together or - any((name in together) for together in self.index_together) - ) - ) - - def describe(self): - return "Alter %s for %s (%s constraint(s))" % (self.option_name, self.name, len(self.index_together or '')) + super().__init__(name, index_together) class AlterOrderWithRespectTo(FieldRelatedOptionOperation): |