New nested resource with link_to

Question

I have this route:

resources :projects do
  resources :services
  resources :contacts
  resources :title_abstracts
  resources :parcels
  resources :leases
  resources :documents
end

this is in my Projects View to add a new Contact to the Project:

new_project_contact_path(@project) 

The url produced is: http://localhost:3000/projects/15/contacts/new

And the Contacts Controller:

def new
  @project = Project.find(params[:project_id])
  @contact = @project.contacts.build
end

def create
  @project = Project.find(params[:project_id])
  @contact = @project.contacts.build(params[:contact])
  @contact.save

  redirect_to project_path
end

But I get the following error:

 Couldn't find Project with 'id'=

What am I doing wrong? How should I test this?

Answer 1

In your routes.rb you nested :contacts in :projects. but when you use simple_form_for, you cannot implicitly declare <%= simple_form_for @contact do |f| %>. You should pass the url:{controller: :contacts, action: :create, project_id:@project.id} as an argument along with the new @contact instance to simple_form_for. so that params[:project_id] will be available in your controller.

If you really wish to use <%= simple_form_for @contact do |f| %>, you need to add
resources :contacts to your routes.rb file but you need to optimize your controller action code for desired routing. I think it would help you.Thank you.