Sorry, should have been more clear. There were two issues. The first was the description column of `Video` and `Review` models being strings, so the character limit is set at 255 in PostgreSQL, so I had to do an up/down migration to change the column type from string to text (which has no character size limit).

The second was that running `user_1.following_relationships.create(leader: user_2)` would throw a parent model not created error in PostgreSQL. Not 100% sure why since `user_1` definitely exists already. Must have something to do with the following_relationships method linking to the Relationship table.