Usage information for camelCase outgoing parameters

[nathany]

The Plug for incoming parameters is working fine, but I must be missing something to get Phoenix Controller's json to do the translation to camel case.

I've followed along with the readme, trying both option for format_encoders:

config :phoenix, :json_library, Jason

config :phoenix, :format_encoders, json: ProperCase.JSONEncoder.CamelCase
config :phoenix, :format_encoders, json: MyApp.CustomJSONEncoder

And have this in a controller:

conn
|> json(%{okay_awesome: true})

Output:

{
    "okay_awesome": true
}

But I would like to see okayAwesome.

Related: #5

[frfroes]

+1 for this one, I have the exact same issue and tried already both cases.

[frfroes]

Looks like the issue in my case was due to this rescue clause. I was trying to return an Ecto schema in my view and the ProperCase.to_camel_case/1 simply returns the original map when something when it raises Protocol.UndefinedError, which was happening due to the non-Enumerable Ecto fields. The solution for me was to drop such fields before returning:

def render("my_schema.json", %{my_schema: my_schema}) do
    %{
      ok: true,
      my_schema: my_schema |> Map.from_struct() |> Map.drop([:__meta__, :association_field])
    }
 end

That's probably an improvement point, at least to log the something in the rescue clause to let people know what's up.

[christhekeele]

Also experiencing the same problem, using plain maps for what it's worth.

[christhekeele]

Ah I think I figured my (and likely @nathany's) problem out:

The json controller helper skips the template rendering pipeline entirely. However, Phoenix formatters are implicitly tied to templates: they are looked up based on root extension of a template file. So I imagine the formatter fires fine on render conn, "template.json") for some template.json.eex, but not raw data structures passed to the controller json helper.

For now I'm just calling json(conn, ProperCase.to_camel_case(data)).