Add support for some JSON-patch operations

[d-mart]

• 🔜 Will update docs if the API looks ok
• Modify existing objects using param names and validators as called out in a transcoder
• Prevent modification of properties or links by adding a protected: true option in the transcoder
• "replace" on defproperty and deflink
• "add" (append) to a deflinks list with path: /foo/- syntax
• "replace" entire deflinks list
• JSON-patch RFC: https://tools.ietf.org/html/rfc6902

[pezra]

How would a phoenix action look like for this interface?

[d-mart]

How would a phoenix action look like for this interface?

Something like this (generic/psuedo code, but adapted from a real use)

def update(%{method: "PATCH"} = conn, %{"_json" => change_list, "id" => id}) do
  my_thing = Repo.Thing.get(id)  # generic Ecto.Repo lookup
  updated_thing = my_thing
  |> Map.from_struct
  |> ThingTranscoder.patch!(change_list)

  case Repo.Thing.changeset(my_thing, updated_thing) |> Repo.update! do
    {:error, error} -> # use conn to return error
    {:ok, _} -> # use conn to return 204
  end
end

[pezra]

released as 5.2.1

[pezra]

thanks!

[d-mart]

Awesome, thanks!