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63 lines
1.5 KiB
Elixir
63 lines
1.5 KiB
Elixir
defmodule AshPostgres.Extensions.Vector do
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@moduledoc """
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An extension that adds support for the `vector` type.
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Create a file with these contents, not inside of a module:
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```elixir
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Postgrex.Types.define(<YourApp>.PostgrexTypes, [AshPostgres.Extensions.Vector] ++ Ecto.Adapters.Postgres.extensions(), [])
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```
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And then ensure that you refer to these types in your repo configuration, i.e
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```elixir
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config :my_app, YourApp.Repo,
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types: <YourApp>.PostgrexTypes
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```
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"""
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import Postgrex.BinaryUtils, warn: false
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def init(opts), do: Keyword.get(opts, :decode_binary, :copy)
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def matching(_), do: [type: "vector"]
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def format(_), do: :binary
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def encode(_) do
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quote do
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vec when is_struct(vec, Ash.Vector) ->
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data = vec |> Ash.Vector.to_binary()
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[<<IO.iodata_length(data)::int32()>> | data]
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vec ->
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case Ash.Vector.new(vec) do
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{:ok, vector} ->
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data = Ash.Vector.to_binary(vector)
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[<<IO.iodata_length(data)::int32()>> | data]
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{:error, error} ->
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raise """
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Attempting to encode invalid vector, error: #{inspect(error)}
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Vector:
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#{inspect(vec)}
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"""
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end
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end
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end
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def decode(:copy) do
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quote do
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<<len::int32(), bin::binary-size(len)>> ->
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bin |> :binary.copy() |> Ash.Vector.from_binary()
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end
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end
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def decode(_) do
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quote do
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<<len::int32(), bin::binary-size(len)>> ->
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bin |> Ash.Vector.from_binary()
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end
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end
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end
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