Question

I have a Ticket model which has_many :tags. I would like to find all tickets that have tags where tag.label is in an array of strings.

Here’s what i’m trying at the moment:

tags = params[:tags].split(',')
if tags.count > 0 then
  t = t.scoped(include: :tag).where('tags.label' => tags.map(&:label))
end

Answer 1

Something like this should work:

Ticket.joins(:tags).where(:tags => { :label => array_of_strings })

Or as a scope:

scope :by_labels, lambda { |tags| joins(:tags).where(:tags => { :label => tags }) unless tags.blank? }

The problem with Mikhail Nikalyukin’s solution is .map(&:label). That part is not necessary.