How to exclude an array of ids from query in Rails (using ActiveRecord)?

Question

I would like to perform an ActiveRecord query that returns all records except those records that have certain ids. The ids I would like excluded are stored in an array. So

Answer 1

As nslocum wrote, the following works well:

Item.where.not(id: ids_to_exclude)

If your "ids to exclude" come from a query (here with an example condition), you can even take it a step further:

Item.where.not(id: Item.where(condition: true))

This is useful if you need to filter another model:

OtherModel.where.not(item_id: Item.where(condition: true))