Rails postgres query - Model.where(model.has_many_relationship_item.count >= 2)?

Question

I need to return an array of a category where a particular item of which it has_many , has a .count >= 2

I know this sytax is wrong, but I'm trying to figure out the correct way, any tips??

Model.where(model.has_many_relationship_item.count >= 2) ??

Thanks in advance!!

Answer 1

The only way I know how to do this is:

Model.joins(:items).group('models.id').having('count(items.id) >= 2')

assuming (for example) the class of the related model is Item

Answer 2

Category.joins（：items）.group（“cateogry.id”）。having（“COUNT（items.id）> = 2”）

Answer 3

Model.joins(:association).group('model_table.id').having('COUNT(association_table.id) >= 2')