Allow validates_length_of to work on association - Fix #1007

[prashantjois]

if the length check is on an association then create an array to assign to the association instead of a string

[prashantjois]

This enhancement works but I'm struggling to test it. Would love some guidance on creating a test model with a has_many and has_many through: ... association.

[StragaSevera]

It would be great to have this feature in the main gem!

[KapilSachdev]

@mcmire is there anything pending for this PR?

[mcmire]

@KapilSachdev Yes. In order to merge this addition, there need to be tests. Essentially, most of the scenarios represented within validate_length_of_spec, including most of the qualifier tests, need to be updated to also account for associations. This includes:

• Validation option minimum + qualifier is_at_least
• Validation option maximum + qualifier is_at_most
• Validation option is + qualifier is_equal_to
• allow_nil
• allow_blank

[KapilSachdev]

My bad, i missed the PR: Needs Tests label.
As the OP hasn't responded and in case anyone else does not wants to work, I will move this PR forward asap, .

[mcmire]

@KapilSachdev No worries, I should have said something initially when adding that tag. Thank you, that would be much appreciated!

[matsales28]

Closing this PR as this was implemented on #1569.