Phoenix emits "protocal Enumerable not implemnted" error when path helpers get called -

for phoenix app, created 2 routes following:

scope "/", greeter   pipe_through :browser    "/hello", hellocontroller, :show   "/hello/:name", hellocontroller, :show end 

with them, app can respond both "/hello" , "/hello/alice" paths.

but, when use path helper hello_path(@conn, :show, "alice") produce "/hello/alice", phoenix server emits error message:

protocol enumerable not implemented "alice"

the cause simple.

the first route creates 2 helpers hello_path/2 , hello_path/3, second route creates 1 helper hello_path/4 because hello_path/3 defined.

this hello_path/3 demands enumerable third argument.

how should avoid error?

you can give 1 of route different name using as::

get "/hello", hellocontroller, :show "/hello/:name", hellocontroller, :show, as: :hello_with_name 

test:

iex(1)> import myapp.router.helpers myapp.router.helpers iex(2)> hello_path myapp.endpoint, :show "/hello" iex(3)> hello_path myapp.endpoint, :show, foo: "bar" "/hello?foo=bar" iex(4)> hello_with_name_path myapp.endpoint, :show, "alice" "/hello/alice" iex(5)> hello_with_name_path myapp.endpoint, :show, "alice", foo: "bar" "/hello/alice?foo=bar"