Chore: Enable Users to create multiple accounts (#440)

Addresses: #402
- migrations to split roles and other attributes from users table
- make changes in code to accommodate this change

Co-authored-by: Sojan Jose <sojan@pepalo.com>
Co-authored-by: Pranav Raj Sreepuram <pranavrajs@gmail.com>

spec/models/account_spec.rb

@@ -5,7 +5,8 @@ require 'rails_helper'
 RSpec.describe Account do
   it { is_expected.to validate_presence_of(:name) }
 
-  it { is_expected.to have_many(:users).dependent(:destroy) }
+  it { is_expected.to have_many(:users).through(:account_users) }
+  it { is_expected.to have_many(:account_users) }
   it { is_expected.to have_many(:inboxes).dependent(:destroy) }
   it { is_expected.to have_many(:conversations).dependent(:destroy) }
   it { is_expected.to have_many(:contacts).dependent(:destroy) }

spec/models/account_user_spec.rb

@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe User do
+  let!(:account_user) { create(:account_user) }
+
+  describe 'notification_settings' do
+    it 'gets created with the right default settings' do
+      expect(account_user.user.notification_settings).not_to eq(nil)
+
+      expect(account_user.user.notification_settings.first.conversation_creation?).to eq(false)
+      expect(account_user.user.notification_settings.first.conversation_assignment?).to eq(true)
+    end
+  end
+end

spec/models/user_spec.rb

@@ -8,12 +8,11 @@ RSpec.describe User do
   context 'validations' do
     it { is_expected.to validate_presence_of(:email) }
     it { is_expected.to validate_presence_of(:name) }
-    it { is_expected.to validate_presence_of(:account_id) }
   end
 
   context 'associations' do
-    it { is_expected.to belong_to(:account) }
-    it { is_expected.to belong_to(:inviter).class_name('User').required(false) }
+    it { is_expected.to have_many(:accounts).through(:account_users) }
+    it { is_expected.to have_many(:account_users) }
     it { is_expected.to have_many(:assigned_conversations).class_name('Conversation').dependent(:nullify) }
     it { is_expected.to have_many(:inbox_members).dependent(:destroy) }
     it { is_expected.to have_many(:notification_settings).dependent(:destroy) }
@@ -27,13 +26,4 @@ RSpec.describe User do
     it { expect(user.pubsub_token).not_to eq(nil) }
     it { expect(user.saved_changes.keys).not_to eq('pubsub_token') }
   end
-
-  describe 'notification_settings' do
-    it 'gets created with the right default settings' do
-      expect(user.notification_settings).not_to eq(nil)
-
-      expect(user.notification_settings.first.conversation_creation?).to eq(false)
-      expect(user.notification_settings.first.conversation_assignment?).to eq(true)
-    end
-  end
 end