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