Class AddField

Declaration

Documentation

Methods

• ▶ def __init__(self, model_name, name, field, preserve_default=True) override

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  This method overrides django.db.migrations.operations.fields.FieldOperation.__init__.

• ▶ def database_backwards(self, app_label, schema_editor, from_state, to_state) override

  inherited doc Perform the mutation on the database schema in the reverse direction - e.g. if this were CreateModel, it would in fact drop the model's table.

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  This method overrides django.db.migrations.operations.base.Operation.database_backwards.

• ▶ def database_forwards(self, app_label, schema_editor, from_state, to_state) override

  inherited doc Perform the mutation on the database schema in the normal (forwards) direction.

  source link

  This method overrides django.db.migrations.operations.base.Operation.database_forwards.

• ▶ def deconstruct(self) override

  inherited doc Return a 3-tuple of class import path (or just name if it lives under django.db.migrations), positional arguments, and keyword arguments.

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  This method overrides django.db.migrations.operations.base.Operation.deconstruct.

• ▶ def describe(self) override

  inherited doc Output a brief summary of what the action does.

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  This method overrides django.db.migrations.operations.base.Operation.describe.

• ▶ def migration_name_fragment(self) override @property

  inherited doc A filename part suitable for automatically naming a migration containing this operation, or None if not applicable.

  @property
  def migration_name_fragment(self)

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  This method overrides django.db.migrations.operations.base.Operation.migration_name_fragment.

• ▶ def reduce(self, operation, app_label) override

  inherited doc Return either a list of operations the actual operation should be replaced with or a boolean that indicates whether or not the specified operation can be optimized across.

  source link

  This method overrides django.db.migrations.operations.fields.FieldOperation.reduce.

• ▶ def state_forwards(self, app_label, state) override

  inherited doc Take the state from the previous migration, and mutate it so that it matches what this migration would perform.

  source link

  This method overrides django.db.migrations.operations.base.Operation.state_forwards.

Inherited methods

• Methods inherited from django.db.migrations.operations.fields.FieldOperation:
  is_same_field_operation, is_same_model_operation, model_name_lower, name_lower, references_field, references_model
• Methods inherited from django.db.migrations.operations.base.Operation:
  __new__, __repr__, allow_migrate_model

Reexports

• Imported in django.db.migrations.operations.models.
• Imported in django.db.migrations.operations.

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