Rails-链接到新动作，而不是显示不存在的项目？

Question

I'm trying to create a link so that if the current user has a project already created, then they just click the 'Project' link, and it will take them to their project. Each user can only have one project. If they don't have a project, then it will instead take them to the form to create one (ie the new view/action).

How would I go about this? I apologise, I'm new to rails. At the moment, I am using the following:

<%= link_to 'Project', project_path %>

which works fine if the user already has a project, but says "No route matches {:action=>"show", :controller=>"projects"}" if one doesn't exist. I'm not sure where to start - do I add in conditions to the link_to, or is it something I need to put in the controller? Thanks!

Answer 1

I guess you should check it inside the new action. Find project if exist and redirect to the edit action.

If you will decide which link to render user can cheat you and type /projects/new in address bar.

Answer 2

<%= link_to 'Project', 
      current_user.project.present? ? 
        project_path(current_user.project) : 
        new_project_path %>