Fixed studyroomMigration (#462)

* fixed studyroomMigration

* added qp again

* 1/2 edited migration

* 2/2 fixed schema.rb

* improved migration

db/migrate/20241027103012_create_study_room_presence.rb

@@ -8,10 +8,10 @@ def change
       t.datetime :deleted_at
       t.timestamps
     end
-  end
 
-  Permission.create(name: 'study_room_presence.create')
-  Permission.create(name: 'study_room_presence.read')
-  Permission.create(name: 'study_room_presence.update')
-  Permission.create(name: 'study_room_presence.destroy')
+    Permission.find_or_create_by!(name: 'study_room_presence.create')
+    Permission.find_or_create_by!(name: 'study_room_presence.read')
+    Permission.find_or_create_by!(name: 'study_room_presence.update')
+    Permission.find_or_create_by!(name: 'study_room_presence.destroy')
+  end
 end

db/schema.rb

@@ -9,6 +9,7 @@
 # migrations use external dependencies or application code.
 #
 # It's strongly recommended that you check this file into your version control system.
+
 ActiveRecord::Schema[7.0].define(version: 2024_10_27_103012) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -484,7 +485,7 @@
     t.index ["datetime"], name: "index_quickpost_messages_on_datetime"
     t.index ["deleted_at"], name: "index_quickpost_messages_on_deleted_at"
   end
-
+  
   create_table "room_adverts", force: :cascade do |t|
     t.string "house_name", null: false
     t.string "contact", null: false