ruby on rails - Test order in has_many relationship with RSpec -

i'm not experienced rails , rspec , have troubles writing tests. so, next trouble don't know how test order in model's relationship properly.

let's have simple model this:

class kitchen < activerecord::base   has_many :orders, -> { order(completed_at: :desc) } end 

and simple test model:

require 'rails_helper'  rspec.describe kitchen, :type => :model   before { @kitchen = factorygirl.create(:kitchen) }    subject { @kitchen }    describe "orders"     before       @kitchen.orders.build(description: "test description 1",         completed_at: 1.day.ago.localtime)        @kitchen.orders.build(description: "test description 2",         completed_at: time.now)     end      "should sorted completion date in descending order"       expect(@kitchen.orders.first.completed_at).to > @kitchen.orders.last.completed_at     end   end end 

as result have got error:

failure/error: expect(@kitchen.orders.first.completed_at).to > @kitchen.orders.last.completed_at    expected: > fri, 15 may 2015 12:21:54 utc +00:00         got:   thu, 14 may 2015 12:21:54 utc +00:00 

any appreciated.

you using build. not persist database, when call @kitchen.orders.first, not hitting database, getting first 1 created, wrong one.

use create instead, call @kitchen.reload refresh database.