Check if current_user is the owner of a resource and allow edit/delete actions

Question

Example:

User A (id=10) has created a photo resource

photo: (id: 1 user_id = 10, url: \"http://...\")
         


        

Answer 1

Write another before_filter in application_controller:

before_filter :has_permission?

has_permission?
controllers=["articles", "photos", "..."]
actions=["edit", "destroy", "..."]
id = params[:id] if (controllers.include?(params[:controller] && actions.include?(params[:action]) end
if id && (current_user.id==(params[:controller][0...1].capitalize!+params[:controller].singularize[1...-1] + ".find(#{id}).user_id").send)
return true
else
redirect_to root_url, :notice=>"no permission for this action"
end

helper_method :has_permission?

And you can use it in views, not to show users link they can't follow.

Some kind of this, of course you need to modify it to suit your needs.