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ash_postgres
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0.1.1-rc.0
0.1.0
The PostgreSQL data layer for Ash Framework
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Files
lib/extensions/vector.ex
defmodule AshPostgres.Extensions.Vector do
@moduledoc """
An extension that adds support for the `vector` type.
Create a file with these contents, not inside of a module:
```elixir
Postgrex.Types.define(<YourApp>.PostgrexTypes, [AshPostgres.Extensions.Vector] ++ Ecto.Adapters.Postgres.extensions(), [])
```
And then ensure that you refer to these types in your repo configuration, i.e
```elixir
config :my_app, YourApp.Repo,
types: <YourApp>.PostgrexTypes
```
"""
import Postgrex.BinaryUtils, warn: false
def init(opts), do: Keyword.get(opts, :decode_binary, :copy)
def matching(_), do: [type: "vector"]
def format(_), do: :binary
def encode(_) do
quote do
vec when is_struct(vec, Ash.Vector) ->
data = vec |> Ash.Vector.to_binary()
[<<IO.iodata_length(data)::int32()>> | data]
vec ->
case Ash.Vector.new(vec) do
{:ok, vector} ->
data = Ash.Vector.to_binary(vector)
[<<IO.iodata_length(data)::int32()>> | data]
{:error, error} ->
raise """
Attempting to encode invalid vector, error: #{inspect(error)}
Vector:
#{inspect(vec)}
"""
end
end
end
def decode(:copy) do
quote do
<<len::int32(), bin::binary-size(len)>> ->
bin |> :binary.copy() |> Ash.Vector.from_binary()
end
end
def decode(_) do
quote do
<<len::int32(), bin::binary-size(len)>> ->
bin |> Ash.Vector.from_binary()
end
end
end