I am going over the following tutorial in an attempt to get my head around elixir and phoenix:
https://thoughtbot.com/blog/testing-a-phoenix-elixir-json-api
I am running into an issue with the test, mainly using Poison.encode! on the Contact model. I get the following error:
unable to encode value: {nil, "contacts"}
This led me to the following issue:
https://github.com/elixir-lang/ecto/issues/840 and the fix: https://coderwall.com/p/fhsehq/fix-encoding-issue-with-ecto-and-poison
I have added the code from the blog article into lib/poison_encoder.ex, but I now get the following error:
no function clause matching in Poison.Encoder.Any.encode/2
The code I have in lib/poison_encoder.ex:
defimpl Poison.Encoder, for: Any do
def encode(%{__struct__: _} = struct, options) do
map = struct
|> Map.from_struct
|> sanitize_map
Poison.Encoder.Map.encode(map, options)
end
defp sanitize_map(map) do
Map.drop(map, [:__meta__, :__struct__])
end
end
lib/poison_encoder.ex
in the post – Paweł Obrok