Merge pull request #248 from openHPI/improve_groups

Improve groups with a view and always create a group

app/models/consumer.rb

@@ -1,7 +1,8 @@
 class Consumer < ApplicationRecord
   has_many :users
 
-  scope :with_users, -> { where('id IN (SELECT consumer_id FROM internal_users)') }
+  scope :with_internal_users, -> { where('id IN (SELECT DISTINCT consumer_id FROM internal_users)') }
+  scope :with_study_groups, -> { where('id IN (SELECT DISTINCT consumer_id FROM study_groups)') }
 
   validates :name, presence: true
   validates :oauth_key, presence: true, uniqueness: true