Rails: Updating Nested attributes - undefined method `to_sym' for nil:NilClass?

I've figured it out. I read that a join table like MatchTeams doesn't need an ID. I'm guessing this is true when not doing any nested forms.

I redid my migration removing the exclusion of the id column, and now everything works fine. Don't we all love this stupid errors? :).

Without seeing the offending to_sym in your code, just know that the thing it's attached to has not been defined properly. If this is a variable such as @var. To_sym, you most likely.

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