Display relevant projects for a creative based on matching skills

gistfile1.txt

  <% user_skills = [] %>
  <% @user.skills.each do |skill| %>
    <% user_skills << skill %>
  <% end %>
  
  <% @projects.each do |project| %>
    <% project_skill = [] %>
    <% project_skill << project.skills %>
    <% if (user_skills & project_skill).length > 0 %>
      <%= project.title %>
    <% end %>
  <% end %>

I see what you're trying to do; but don't forget that all of this logic should not be in the view: under MVC we want the view to just display something; not arrive at the information that we are displaying. This should be in the model as a method and called from the controller, leaving you something to iterate over in the view.

Lines 1-4 don't seem necessary to me. What's wrong with @user.skills?
In terms of finding the projects where a certain criteria is found, this is a use for the where method. Try something along the lines of

project.skills.where(:skill => @user.skills.ids)

Not 100% sure that will work, but the worst case scenario is you could have some kind of loop where you cross-reference the skills in a method. But do it in the model, and write a test for it.

Keep going!