It is PRINCIPLES - truths; not PRINCIPALS - people in charge of schools or racing teams.

By deleteing the dev database, recreating it from migrations and then preparing the test database; the foreign key contraints now work. Also the database tables are now uft8mb4 instead of lantin1.

May be an idea to do this every time there is a rails update until going live.

test/fixtures/users.yml

@@ -4,8 +4,8 @@
 # model remove the "{}" from the fixture names and add the columns immediately
 # below each fixture, per the syntax in the comments below
 #
-one: {}
-# column: value
-#
-two: {}
-# column: value
+# one: {}
+# # column: value
+# #
+# two: {}
+# # column: value