I recently started with rubyonrails and on my first project i got this error , I simply created a project and a scaffold command ( but it generates the error i tried to debug using calude and gpt too but they also don’t know what’s the bug ) any slutions?

rubyonrails-talk
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2

Do what the error says and create a products directory under app/views and put a index.html.erb file into it (the view template). Put <h1>hello</h1> in the file and see if it comes up.

3

appreciate the concern but the things is that file is already generated by rails scaffold. But somehow it’s not being complied and I am facing this error

4

just to confirm - you have the file

app/views/products/index.html.erb ?

fwiw:

You said:

No view template for interactive request ProductsController#index is missing a template for request formats: text/html NOTE: Rails usually expects a controller action to render a view template with the same name. For example, a ProductsControllertindex action defined in app/controllers/products_controller.rb should have a corresponding view template in a file named app/views/products/index.html.erb However, if this controller is an API endpoint responding with 204 (No Content), which does not require a view template because it doesn’t serve an HTML response, then this error will occur when trying to access it with a browser. In this particular scenario, you can ignore this error. You can find more about view template rendering conventions in the Rails Guides on Layouts and Rendering in Rails.

ChatGPT said:

Rails is telling you that your ProductsController#index action is being called in the browser, but there’s no matching view file.

By convention, Rails expects this action:

# app/controllers/products_controller.rb
class ProductsController < ApplicationController
  def index
    @products = Product.all
  end
end

to have a view file here:

<!-- app/views/products/index.html.erb -->
<h1>Products</h1>

<ul>
  <% @products.each do |product| %>
    <li><%= product.name %></li>
  <% end %>
</ul>

That will satisfy the default HTML request.

If you actually intend ProductsController#index to be API-only (returning JSON or no content), you must either:

  1. Tell Rails what to render explicitly, for example:
# app/controllers/products_controller.rb
class ProductsController < ApplicationController
  def index
    @products = Product.all
    render json: @products
  end
end
  1. Or return head :no_content if no response body is needed:
# app/controllers/products_controller.rb
class ProductsController < ApplicationController
  def index
    head :no_content
  end
end

Which one do you want: a standard HTML page listing products, or an API-style response (JSON/no content)?

You said:

this was done using a scaffold command and the user says the file was generated?

ChatGPT said:

If you generated Products with a Rails scaffold command like:

bin/rails generate scaffold Product name:string price:decimal
bin/rails db:migrate

then Rails should have created:

  • Controller: app/controllers/products_controller.rb

  • Views:

    • app/views/products/index.html.erb

    • app/views/products/show.html.erb

    • app/views/products/new.html.erb

    • app/views/products/edit.html.erb

    • _form.html.erb partial

If you’re getting the error “ProductsController#index is missing a template”, it usually means one of these:

  1. Scaffold was generated with --api flag Example:

    bin/rails generate scaffold Product name:string --api

    In that case, Rails doesn’t generate view templates at all, only JSON-style responses.

  2. The views folder or files were accidentally deleted Check that app/views/products/index.html.erb really exists.

  3. Namespace mismatch If your controller is inside a namespace (e.g., module Admin), Rails will expect app/views/admin/products/index.html.erb.

To fix it:

  • If you want HTML views → create the missing file:

    <!-- app/views/products/index.html.erb -->
<h1>Products</h1>

<ul>
  <% @products.each do |product| %>
    <li><%= product.name %></li>
  <% end %>
</ul>

  • If you only need API responses → add render json: @products to index (instead of leaving it empty).