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diff --git a/lib/open_api_spex/plug/cast.ex b/lib/open_api_spex/plug/cast.ex
index 2bbd6ad..e317953 100644
--- a/lib/open_api_spex/plug/cast.ex
+++ b/lib/open_api_spex/plug/cast.ex
@@ -1,44 +1,55 @@
defmodule OpenApiSpex.Plug.Cast do
@moduledoc """
Module plug that will cast the `Conn.params` according to the schemas defined for the operation.
The operation_id can be given at compile time as an argument to `init`:
plug OpenApiSpex.Plug.Cast, operation_id: "MyApp.ShowUser"
For phoenix applications, the operation_id can be obtained at runtime automatically.
defmodule MyAppWeb.UserController do
use Phoenix.Controller
plug OpenApiSpex.Plug.Cast
...
end
"""
@behaviour Plug
alias Plug.Conn
@impl Plug
def init(opts), do: opts
@impl Plug
def call(conn = %{private: %{open_api_spex: private_data}}, operation_id: operation_id) do
spec = private_data.spec
operation = private_data.operation_lookup[operation_id]
content_type = Conn.get_req_header(conn, "content-type") |> Enum.at(0)
private_data = Map.put(private_data, :operation_id, operation_id)
conn = Conn.put_private(conn, :open_api_spex, private_data)
case OpenApiSpex.cast(spec, operation, conn, content_type) do
{:ok, params} -> %{conn | params: params}
{:error, reason} ->
conn
|> Plug.Conn.send_resp(422, "#{reason}")
|> Plug.Conn.halt()
end
end
- def call(conn = %{private: %{phoenix_controller: controller, phoenix_action: action}}, _opts) do
- call(conn, operation_id: controller.open_api_operation(action).operationId)
+ def call(conn = %{private: %{phoenix_controller: controller, phoenix_action: action, open_api_spex: _pd}}, _opts) do
+ operation_id = controller.open_api_operation(action).operationId
+ if (operation_id) do
+ call(conn, operation_id: operation_id)
+ else
+ raise "operationId was not found in action API spec"
+ end
+ end
+ def call(_conn = %{private: %{open_api_spex: _pd}}, _opts) do
+ raise ":operation_id was neither provided nor inferred from conn. Consider putting plug OpenApiSpex.Plug.Cast rather into your phoenix controller."
+ end
+ def call(_conn, _opts) do
+ raise ":open_api_spex was not found under :private. Maybe OpenApiSpex.Plug.PutApiSpec was not called before?"
end
-end
\ No newline at end of file
+end

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