Updates are never updated!

app/models/project.rb

@@ -21,7 +21,7 @@ class Project < ApplicationRecord
   has_many :project_interests
   has_many :keywords, through: :project_interests
 
-  has_many :updates, dependent: :destroy
+  has_many :updates, -> { order 'created_at DESC' }, dependent: :destroy
 
   has_many :comments, as: :commentable, dependent: :destroy
 

app/models/user.rb

@@ -7,7 +7,7 @@ class User < ApplicationRecord
   validates_uniqueness_of :email
 
   has_many :originated_projects, foreign_key: 'originator_id', class_name: 'Project'
-  has_many :updates, -> { order 'updated_at DESC' }, foreign_key: 'author_id', dependent: :destroy
+  has_many :updates, -> { order 'created_at DESC' }, foreign_key: 'author_id', dependent: :destroy
 
   has_many :memberships
   has_many :comments, foreign_key: 'commenter_id'

spec/models/project_spec.rb

@@ -64,6 +64,8 @@
     before do
       @project = FactoryBot.create(:project)
       @idea = FactoryBot.create(:idea)
+      # We sort updates by updated_at, make sure it's different from the creation updates
+      sleep 1
       @user = FactoryBot.create(:user)
       @project.join!(@user)
       @idea.join!(@user)
@@ -78,21 +80,23 @@
     end
 
     it 'creates an Update object assigned to the user' do
-      expect(@project.updates.last.author).to eq(@user)
+      expect(@project.updates.first.author).to eq(@user)
     end
 
     context 'when project has no users (state == idea)' do
-      it { expect(@idea.updates.last.text).to eq('started') }
+      it { expect(@idea.updates.first.text).to eq('started') }
     end
 
     context 'when project has a user (state == project)' do
-      it { expect(@project.updates.last.text).to eq('joined') }
+      it { expect(@project.updates.first.text).to eq('joined') }
     end
   end
 
   describe 'leave!' do
     before do
       @project = FactoryBot.create(:project)
+      # We sort updates by updated_at, make sure it's different from the creation updates
+      sleep 1
       @user = @project.users.first
       @project.leave!(@user)
     end
@@ -102,8 +106,8 @@
     end
 
     it 'creates an Update for the user with text "left"' do
-      expect(@project.updates.last.author).to eq(@user)
-      expect(@project.updates.last.text).to eq('left')
+      expect(@project.updates.first.author).to eq(@user)
+      expect(@project.updates.first.text).to eq('left')
     end
 
     context 'when the removed user was the last one' do