CODEWITHSUNDEEP
routeselixirphoenix-framework
Shizu
Shizu

Reputation: 11

Elixir - Nested Route _Paths in Heex templates?

I'm relatively new to Elixir and Phoenix so sorry if this is a dumb question.

When trying to figure out nested routes I am getting the following error:

function QWeb.Router.Helpers.comment_path/2 is undefined or private
or 
function QWeb.Router.Helpers.post_comment_path/2 is undefined or private

Using https://hexdocs.pm/phoenix/routing.html

I'm currently assuming its an arity error caused by me not knowing what I need to edit when making nested routes, as I get a warning when starting the server flagging my Heex files within the comment folder asking me if I meant to use:

      * post_comment_path/3
      * post_comment_path/4
      * post_comment_path/5
      * post_path/2
      * post_path/3

Currently my router:

    resources "/posts", PostController do 
      resources "/comments", CommentController
    end

If I run mix.phx.routes I get the following:

       post_comment_path  GET     /posts/:post_id/comments               
       post_comment_path  GET     /posts/:post_id/comments/:id/edit      
       post_comment_path  GET     /posts/:post_id/comments/new           
       post_comment_path  GET     /posts/:post_id/comments/:id           
       post_comment_path  POST    /posts/:post_id/comments               
       post_comment_path  PATCH   /posts/:post_id/comments/:id           
                          PUT     /posts/:post_id/comments/:id          
       post_comment_path  DELETE  /posts/:post_id/comments/:id

I'm able to go to http://localhost:4000/posts and render the page fine. I can create a post and get http://localhost:4000/posts/1.

If I then go to http://localhost:4000/posts/1/comments/new I get the error above stating the comment_path is undefined or private because of the Heex template errors.

The path works if I delete the below content from the prebuilt new.html.heex file

<%= render "form.html", Map.put(assigns, :action, Routes.comment_path(@conn, :create)) %>

<span><%= link "Back", to: Routes.comment_path(@conn, :index) %></span>

I've tried changing both to post_comment_path(@conn etc as well to match what it says in the router but I just get the same error with the additional post_ prefixed on to it.

If I un-nest(?) the routes and go to http://localhost:4000/comments I obviously have no issues creating comments alone as its the same as posts with a different name. So Routes.comment_path works when its not nested.

So I think my first question is where do I even start? Is this something I need to edit in the controller, the heex document, the view or alias somewhere? All the information I can find on nested routes just seems to show you how to nest the routes and see the paths that are meant to be generated in the router. I can't find any information anywhere on how to access nested routes using Routes._path within Phoenix

Any info appreciated and sorry again if this is obvious.

Upvotes: 1

Views: 363

Answers (1)

loving marshmallow
loving marshmallow

Reputation: 331

I don't have the exact code you are doing

I've tried changing both to post_comment_path(@conn etc as well to match what it says in the router but I just get the same error with the additional post_ prefixed on to it.

However, if you are doing the nested version, remember that

<%= render "form.html", Map.put(assigns, :action, Routes.comment_path(@conn, :create)) %>

Won't work since there is no such route. I think you know this already. If you replace for the post_ as you said, just be sure that it looks as follow

<%= render "form.html", Map.put(assigns, :action, Routes._post_comment_path(@conn, :create, POST_ID)) %>

POST_ID being the post id otherwise it will fail as not defined.

Regarding nested or non-nested, it depends on you and what API you want to expose. Both should work (assuming you fix the errors you are having).

Hope it helps :)

Upvotes: 0

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