VBT.Ecto (vbt v0.1.0) View Source
Helpers for working with Ecto.
Link to this section Summary
Functions
Maps the result of a multi operation, or returns an error.
Returns the result of a multi operation or the operation error.
Link to this section Types
Specs
changes() :: %{required(Ecto.Multi.name()) => any()}
Specs
multi_result() ::
{:ok, changes()}
| {:error, failed_operation :: Ecto.Multi.name(), reason :: any(), changes()}
Link to this section Functions
Specs
map_multi_result(multi_result(), (changes() -> result)) :: {:ok, result} | {:error, any()} when result: var
Maps the result of a multi operation, or returns an error.
iex> result = (
...> Ecto.Multi.new()
...> |> Ecto.Multi.run(:foo, fn _, _ -> {:ok, 1} end)
...> |> Ecto.Multi.run(:bar, fn _, _ -> {:ok, 2} end)
...> |> Ecto.Multi.run(:baz, fn _, _ -> {:ok, 3} end)
...> |> VBT.TestRepo.transaction()
...> )
iex> VBT.Ecto.map_multi_result(result)
{:ok, %{foo: 1, bar: 2, baz: 3}}
iex> result = (
...> Ecto.Multi.new()
...> |> Ecto.Multi.run(:foo, fn _, _ -> {:ok, 1} end)
...> |> Ecto.Multi.run(:bar, fn _, _ -> {:ok, 2} end)
...> |> Ecto.Multi.run(:baz, fn _, _ -> {:ok, 3} end)
...> |> VBT.TestRepo.transaction()
...> )
iex> VBT.Ecto.map_multi_result(result, &Map.take(&1, [:foo, :bar]))
{:ok, %{foo: 1, bar: 2}}
iex> result = (
...> Ecto.Multi.new()
...> |> Ecto.Multi.run(:foo, fn _, _ -> {:ok, 1} end)
...> |> Ecto.Multi.run(:bar, fn _, _ -> {:error, "bar error"} end)
...> |> VBT.TestRepo.transaction()
...> )
iex> VBT.Ecto.map_multi_result(result)
{:error, "bar error"}Specs
multi_operation_result(multi_result(), Ecto.Multi.name()) :: {:ok, any()} | {:error, any()}
Returns the result of a multi operation or the operation error.
iex> result = (
...> Ecto.Multi.new()
...> |> Ecto.Multi.run(:foo, fn _, _ -> {:ok, 1} end)
...> |> Ecto.Multi.run(:bar, fn _, _ -> {:ok, 2} end)
...> |> Ecto.Multi.run(:baz, fn _, _ -> {:ok, 3} end)
...> |> VBT.TestRepo.transaction()
...> )
iex> VBT.Ecto.multi_operation_result(result, :foo)
{:ok, 1}
iex> result = (
...> Ecto.Multi.new()
...> |> Ecto.Multi.run(:foo, fn _, _ -> {:ok, 1} end)
...> |> Ecto.Multi.run(:bar, fn _, _ -> {:error, "bar error"} end)
...> |> VBT.TestRepo.transaction()
...> )
iex> VBT.Ecto.multi_operation_result(result, :foo)
{:error, "bar error"}