Ecto.Adapter.Migration behaviour (Ecto SQL v3.7.1) View Source
Specifies the adapter migrations API.
Link to this section Summary
Types
All migration commands
A struct that represents a table or index in a database schema.
All commands allowed within the block passed to table/2
Callbacks
Executes migration commands.
Locks the migrations table and emits the locked versions for callback execution.
Checks if the adapter supports ddl transaction.
Link to this section Types
Specs
adapter_meta() :: Ecto.Adapter.adapter_meta()
Specs
command() :: raw :: String.t() | {:create, Ecto.Migration.Table.t(), [table_subcommand()]} | {:create_if_not_exists, Ecto.Migration.Table.t(), [table_subcommand()]} | {:alter, Ecto.Migration.Table.t(), [table_subcommand()]} | {:drop, Ecto.Migration.Table.t(), :restrict | :cascade} | {:drop_if_exists, Ecto.Migration.Table.t(), :restrict | :cascade} | {:create, Ecto.Migration.Index.t()} | {:create_if_not_exists, Ecto.Migration.Index.t()} | {:drop, Ecto.Migration.Index.t(), :restrict | :cascade} | {:drop_if_exists, Ecto.Migration.Index.t(), :restrict | :cascade}
All migration commands
Specs
ddl_object() :: Ecto.Migration.Table.t() | Ecto.Migration.Index.t()
A struct that represents a table or index in a database schema.
These database objects can be modified through the use of a Data Definition Language, hence the name DDL object.
Specs
table_subcommand() :: {:add, field :: atom(), type :: Ecto.Type.t() | Ecto.Migration.Reference.t() | binary(), Keyword.t()} | {:add_if_not_exists, field :: atom(), type :: Ecto.Type.t() | Ecto.Migration.Reference.t() | binary(), Keyword.t()} | {:modify, field :: atom(), type :: Ecto.Type.t() | Ecto.Migration.Reference.t() | binary(), Keyword.t()} | {:remove, field :: atom(), type :: Ecto.Type.t() | Ecto.Migration.Reference.t() | binary(), Keyword.t()} | {:remove, field :: atom()} | {:remove_if_exists, type :: Ecto.Type.t() | Ecto.Migration.Reference.t() | binary()}
All commands allowed within the block passed to table/2
Link to this section Callbacks
Specs
execute_ddl(adapter_meta(), command(), options :: Keyword.t()) :: {:ok, [{Logger.level(), Logger.message(), Logger.metadata()}]}
Executes migration commands.
Specs
lock_for_migrations(adapter_meta(), options :: Keyword.t(), fun) :: result when fun: (() -> result), result: var
Locks the migrations table and emits the locked versions for callback execution.
It returns the result of calling the given function with a list of versions.
Specs
supports_ddl_transaction?() :: boolean()
Checks if the adapter supports ddl transaction.