New cop suggestion: WhereMissing

[fatkodima]

It should detect cases like this: https://github.com/rails/rails/pull/39136/files

I created similar code several times, have seen at least 1 such example recently in the gitlab's codebase and I'm sure, this is a popular pattern.

where.missing method docs

[andyw8]

Nice, I didn't know about that method, it was added in 6.1:

https://blog.saeloun.com/2020/01/21/rails-6-1-adds-query-method-missing-to-find-orphan-records.html

[koic]

This issue has been resolved by #744.