Rails项目详情页嵌套属性表单问题：修改ProjectLine状态

Hey there! Let's get this working smoothly for you. Your goal is to mark individual ProjectLine entries as complete (status = 4) from the Project show page—here's a clean, secure way to implement that:

Step 1: Add a Custom Route #

First, let's set up a dedicated route for the "mark as complete" action. Open config/routes.rb and add this inside your routes block:

resources :project_lines do
  member do
    patch :complete  # This creates a /project_lines/:id/complete route
  end
end

Using patch makes sense here because we're only updating a single field (status) rather than the entire resource.

Step 2: Add the Controller Action #

Next, open app/controllers/project_lines_controller.rb and add the complete action. This will handle finding the ProjectLine, updating its status, and redirecting back to the Project show page:

class ProjectLinesController < ApplicationController
  # ... your existing actions ...

  def complete
    @project_line = ProjectLine.find(params[:id])
    
    if @project_line.update(status: 4)
      # Redirect back to the parent project with a success message
      redirect_to project_path(@project_line.project), notice: "Task marked as complete!"
    else
      # Handle failure (e.g., validation errors)
      redirect_to project_path(@project_line.project), alert: "Oops, couldn't mark this task as complete."
    end
  end
end

This is more secure than relying on a hidden field because we explicitly set the status to 4 in the controller—users can't tamper with this value in their browser.

Step 3: Update the View #

Now let's tweak your view code to use the new route. We have two clean options:

Option 1: Using a Form (matches your original semantic_form_for approach)

<%= @project.name %>
<% @project.project_lines.each do |project_line| %>
  <%= project_line.description %>
  <%= semantic_form_for project_line, url: complete_project_line_path(project_line), method: :patch do |f| %>
    <%= f.submit 'COMPLETE', class: 'btn btn-primary btn-md' %>
  <% end %>
<% end %>

Option 2: Using a Link (simpler, no form needed)

If you don't need a form, you can use link_to instead—just make sure your Rails app has UJS/Turbo enabled (which it does by default in modern Rails versions):

<%= @project.name %>
<% @project.project_lines.each do |project_line| %>
  <%= project_line.description %>
  <%= link_to 'COMPLETE', complete_project_line_path(project_line), 
              method: :patch, 
              class: 'btn btn-primary btn-md' %>
<% end %>

Quick Notes #

• Double-check that your ProjectLine model has a status attribute (you can confirm this via your database migration if needed).
• If you have validations on ProjectLine, the controller's update call will fail if those validations aren't met—feel free to adjust the error message to fit your use case.

内容的提问来源于stack exchange，提问作者catmal