$reviews = Review.where("LENGTH(text) > 100").all
TestModel.includes(:relation_table).where(...)
# models/User.rb
class User
...
def admin?
self.role == 'admin'
end
...
endh = Hash.new { |h, k| h[k] = Hash.new(&h.default_proc) }
h['bar'] -> {}
h['tar']['star']['par'] -> {}gem install jbuilder