Issue updating foreign key (typo in migration key?)

[OvermindDL1]

@SkinnyGeek1010

** (Ecto.ConstraintError) constraint error when attempting to update struct:

     * foreign_key: interests_interest_list_id_fkey

 If you would like to convert this constraint into an error, please
 call foreign_key_constraint/3 in your changeset and define the proper
 constraint name. The changeset has not defined any constraint.

This just means that your changeset function is missing the foreign_key_constraint/3 call in it, add one as appropriate on your interest list id.

As for the ‘cause’ of that error, you tried to assign a value to a foreign key field (completely legitimate action), however the value you assigned to that field had no matching ID on the remote foreign table, I.E. no row existed with that id.