Fix numbers autoincrement

test/controllers/checks_controller_test.rb

@@ -21,7 +21,7 @@ class ChecksControllerTest < ActionDispatch::IntegrationTest
   test "should create check" do
     assert_difference("Check.count") do
       post checks_url,
-           params: { check: { principle_id: @principle.id, level: @check.level, name_de: @check.name_de, position: @check.position,
+           params: { check: { principle_id: @principle.id, number: Check.maximum(:number) + 1, level: @check.level, name_de: @check.name_de, position: @check.position,
                               criterion_de: @check.criterion_de } }
     end
 

test/fixtures/checks.yml

@@ -4,13 +4,16 @@ one:
   position: MyString
   name: MyString
   level: 1
+  number: 1
 
 two:
   position: MyString
   name: MyString
   level: 1
+  number: 2
 
 deletable:
   position: MyString
   name: MyString
   level: 1
+  number: 3