Question

I have a two scopes in my user model:

scope :hard_deactivated, where(:hard_deactivated => true)
scope :soft_deactivated, where(:soft_deactivated => true)

So far so good

OR

I want to create a scope :deactivated, which will include all users where hard_deactivated is true OR soft deactivated is true. Obviously I could just do this:

scope :deactivated, where("hard_deactivated = ? or soft_deactivated = ?", true, true)

but this does not feel very dry.

NOT

Also I would like to create an inverse scope :not_hard_deactivated. I could do this:

scope :not_hard_deactivated, where(:hard_deactivated => false)

but again, this feels bad, especially if my scope becomes more complex. There should be some way or warpping the SQL generated by the previous scope in a not clause.

Answer 1

Use an arel table:

hard_deactivated_true = arel_table[:hard_deactivated].eq(true)
soft_deactivated_true = arel_table[:soft_deactivated].eq(true)

scope :deactivated, where(hard_deactivated_true.and(soft_deactivated_true))
scope :not_hard_deactivated, where(hard_deactivated_true.not)

See: Is it possible to invert a named scope in Rails3?