如何在link_to中添加：id以实现Rails？

Question

My goal is to create a way for sellers (User) to upload files to buyers (Buyer) in their, the User's, Sales page (their sales history page). I am using Devise for user roles btw.

I have links, for example, I have the URL " localhost:3000/orders/28/sales_uploads/new " working so I can upload to the specific sale.

Though, within the Sales page for the User/seller, I want them to be able to upload the file to the buyer, (buyers buy product, seller then uploads file after purchase - each product/purchase will be custom), either through the sales page, preferably, or by clicking a link - which is where I'm having issues. I want the seller to click a link "Upload" which then directs them to the page to upload the file for the order.

In the Sales page view, (views/sales_uploads/sales), I have

 <%= link_to "Upload", new_order_sales_upload_path(@order, order) %>

but I get an error that there is no order_id.

How can I make it so the link links to the order with the order ID.

I have a

 <% @orders.each do |order| %>

so it cycles through and I can't figure out why it won't work.

Here is my github https://github.com/brandnamewater/digitalcommerce

As you'll see in the view mentioned above, I have the cycling working. I'm assuming I'm having an issue elsewhere, possibly in the controller. Though, I simply cannot figure it out.

Just in case, it's better off i link the entire app as there may be other issues I'm not aware of that are causing this.

I have only been coding regularly for a few weeks now and I'm sure it's something very basic to some of you but I can't figure it out. I have been attempting this for 2 nights now and no other Google searches, Stack searches, etc. have helped.

Answer 1

Well, I had the order mixed up

It was :

<%= link_to "Upload", new_order_sales_upload_path(@order, order) %>

and should had been:

 <%= link_to "Upload", new_order_sales_upload_path(order ,@order) %>

Answer 2

The correct code you're looking for is:

<% @orders.each do |order| %> <%= link_to "Upload", new_order_sales_upload_path(order) %> <% end %>

If you run bin/rails routes | grep new_order_sales_upload bin/rails routes | grep new_order_sales_upload in your terminal it will provide some output which shows us the route helper method and also any parameters we need to pass into the route helper.

For your case it will output

new_order_sales_upload GET    /orders/:order_id/sales_uploads/new(.:format)                                            sales_uploads#new

This shows us the route helper is called new_order_sales_upload and that it expects a single parameter :order_id .

If you were to output @order in your view like <%= @order.inspect %> you would find it is nil because this instance variable is not being set.

Your loop @orders.each is setting a variable called order .

The reason your answer <%= link_to "Upload", new_order_sales_upload_path(order, @order) %> works is because the route helper is only using the first variable order and the second one @order is nil and not being used.

You can read a lot more about routing in rails from the official guide https://guides.rubyonrails.org/routing.html