Ecto.Multi.delete_all

You're seeing just the function delete_all, go back to Ecto.Multi module for more information.
Link to this function

delete_all(multi, name, queryable_or_fun, opts \\ [])

View Source

Specs

delete_all(
  t(),
  name(),
  Ecto.Queryable.t() | fun(Ecto.Queryable.t()),
  Keyword.t()
) :: t()

Adds a delete_all operation to the multi.

Accepts the same arguments and options as Ecto.Repo.delete_all/2 does.

Example

queryable = from(p in Post, where: p.id < 5)
Ecto.Multi.new()
|> Ecto.Multi.delete_all(:delete_all, queryable)
|> MyApp.Repo.transaction()

Ecto.Multi.new()
|> Ecto.Multi.run(:post, fn repo, _changes ->
  case repo.get(Post, 1) do
    nil -> {:error, :not_found}
    post -> {:ok, post}
  end
end)
|> Ecto.Multi.delete_all(:delete_all, fn %{post: post} ->
  # Others validations
  from(c in Comment, where: c.post_id == ^post.id)
end)
|> MyApp.Repo.transaction()