SQL optimisation rolled back. It lead to access problems.

app/models/ability.rb

@@ -33,6 +33,12 @@ class Ability
     # https://github.com/CanCanCommunity/cancancan/wiki/Defining-Abilities
 
     if user.present? # Logged-in users
+      # Allow to view all public/approved screenshots
+      can :view, Screenshot, approved: true
+      # Allow to view any own uploads (even not-yet-approved)
+      can :view, Screenshot, user_id: user.id
+      can :destroy, Screenshot, user_id: user.id
+
       if user.admin_role?
         can :approve, Screenshot
         can :destroy, Screenshot
@@ -45,12 +51,6 @@ class Ability
         can :view, Screenshot
         can :destroy, Screenshot
       end
-      if user.pseudo?
-        # Allow to view all public/approved screenshots
-        can :view, Screenshot, approved: true
-        # Allow to view any own uploads (even not-yet-approved)
-        can :view, Screenshot, user_id: user.id
-      end
     else # Nobody logged in
       can :view, Screenshot, approved: true
     end

app/models/package.rb

@@ -57,7 +57,7 @@ class Package < ApplicationRecord
   end
 
 
-  # Return a query of all packages that have screenshots
+  # Return a query of all packages that do not have screenshots
   def self.without_screenshots
     # Query for all packages who's ID does not appear in a screenshot's "package_id" field
     subselect = Screenshot.select(:package_id)