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A toolkit for data mapping and language integrated query for Elixir
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lib/ecto/adapter/migration.ex
defmodule Ecto.Adapter.Migration do
@moduledoc """
Specifies the adapter migrations API.
"""
use Behaviour
alias Ecto.Migration.Table
alias Ecto.Migration.Index
alias Ecto.Migration.Reference
@typedoc "All migration commands"
@type command ::
raw :: String.t |
{:create, Table.t, [table_subcommand]} |
{:alter, Table.t, [table_subcommand]} |
{:drop, Table.t} |
{:create, Index.t} |
{:drop, Index.t}
@type table_subcommand ::
{:add, field :: atom, type :: Ecto.Type.t | Reference.t, Keyword.t} |
{:modify, field :: atom, type :: Ecto.Type.t | Reference.t, Keyword.t} |
{:remove, field :: atom}
@type ddl_object :: Table.t | Index.t
@doc """
Checks if the adapter supports ddl transaction.
"""
defcallback supports_ddl_transaction? :: boolean
@doc """
Executes migration commands.
## Options
* `:timeout` - The time in milliseconds to wait for the call to finish,
`:infinity` will wait indefinitely (default: 5000);
* `:log` - When false, does not log begin/commit/rollback queries
"""
defcallback execute_ddl(Ecto.Repo.t, command, Keyword.t) :: :ok | no_return
@doc """
Checks if ddl value, like a table or index, exists.
## Options
* `:timeout` - The time in milliseconds to wait for the call to finish,
`:infinity` will wait indefinitely (default: 5000);
* `:log` - When false, does not log begin/commit/rollback queries
"""
defcallback ddl_exists?(Ecto.Repo.t, ddl_object, Keyword.t) :: boolean
end