Rails nested resource routing error

I have a routing error with a nested resource. Here is my nested routing:

resources :users do
  resources :pages
end

This is my minitest "visit new user page" system test:

test "visit new user page path" do
  user = User.create
  visit new_user_page_path(user)
  assert_selector "h1", text: "Page"
end

This fails with the following error:

Error:
PagesTest#test_visit_new_user_page_path:
ActionView::Template::Error: undefined method `pages_path' for #<#<Class:0x00007fa0299dfa28>:0x00007fa02aa23df8>
Did you mean?  image_path
app/views/pages/_form.html.erb:1:in `_app_views_pages__form_html_erb__3658586168370814469_70162960780560'
app/views/pages/new.html.erb:3:in `_app_views_pages_new_html_erb__3548077654233884011_70162934875400'

I realize that pages_path is not a correct path for this nested resource. The correct path to pages#new is new_user_page_path(@user) (which is the path that took me to new.html.erb). The correct path to pages#create is a POST to user_pages_path(@user) (which is the page that new.html.erb should POST to). But I cannot find anywhere that pages_path is being called. The error says that it is being called in new.html.erb and also _form.html.erb. Here are those pages. First, new.html.erb:

<h1>New Page</h1>

<%= render 'form', page: @page %>
<%= link_to 'Back', user_pages_path(@page) %>

And _form.html.erb:

<%= form_with(model: page, local: true) do |form| %>
  <% if page.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(page.errors.count, "error") %> prohibited this page from being saved:</h2>

      <ul>
      <% page.errors.full_messages.each do |message| %>
        <li><%= message %></li>
      <% end %>
      </ul>
    </div>
  <% end %>

  <div class="field">
    <%= form.label :title %>
    <%= form.text_field :title, id: :page_title %>
  </div>

  <div class="field">
    <%= form.label :content %>
    <%= form.text_area :content, id: :page_content %>
  </div>

  <div class="field">
    <%= form.label :user_id %>
    <%= form.text_field :user_id, id: :page_user_id %>
  </div>

  <div class="actions">
    <%= form.submit %>
  </div>
<% end %>

I don't know where pages_path is being called, so I can't fix that error. Any help is appreciated.

You need to change your form code, page_path is called from it. Should be

<%= form_with(model: [ @user, @page ]) do |form| %>

In this case the route will be set correctly.