Make sql less ambiguous when getting unlocks

Author: nygrenh

app/controllers/api/v8/courses/exercises_controller.rb

@@ -45,7 +45,7 @@ def index
             exercises = if unlocked_exercises.empty?
                           exercises.where(unlock_spec: nil)
                         else
-                          exercises.where(["unlock_spec IS NULL OR name IN (#{unlocked_exercises.map { |_| '?' }.join(', ')})", *unlocked_exercises])
+                          exercises.where(["unlock_spec IS NULL OR exercises.name IN (#{unlocked_exercises.map { |_| '?' }.join(', ')})", *unlocked_exercises])
                         end
           end
 

lib/course_info.rb

@@ -44,7 +44,7 @@ def course_data_core_api(course)
       exercises = if @unlocked_exercises.empty?
         exercises.where(unlock_spec: nil)
       else
-        exercises.where(["unlock_spec IS NULL OR name IN (#{@unlocked_exercises.map {|_| '?'}.join(', ')})", *@unlocked_exercises])
+        exercises.where(["unlock_spec IS NULL OR exercises.name IN (#{@unlocked_exercises.map {|_| '?'}.join(', ')})", *@unlocked_exercises])
       end.select { |e| e._fast_visible_to?(@user)}
     end