Merge branch 'master' into adequaterecord

* master: (55 commits)
  [ci skip] Move association class method notes
  extract common code in `uuid_test.rb`.
  move PostgreSQL UUID tests from `datatype_test.rb` to `uuid_test.rb`.
  [ci skip] remove guide section on models in migrations
  test case for custom PostgreSQL enum type.
  Remove inclusion of rubysl gem for rbx on generated Gemfile
  let `insert_record` actuall save the object.
  [skip ci] Fix test name typo in app generator tests.
  travis s/2.1.0/2.1.1
  Bump version of bcrypt gem
  Skip test_migrate_revert_add_index_with_name if databases do not allow to create duplicate indexes on the same columns
  Optimize getting started guide images, and use png instead of jpg
  :scissors: [ci skip]
  Point master changelogs to 4-1-stable branch
  Add missing parantheses in index_exists?
  `ActionDispatch::Head` was replaced by `Rack::Head`. Closes #14191.
  [skip ci] Standardized punctuation.
  [skip ci] Fix typo in link_to :method option description
  refactor, with_locale is not needed because I18n is mocked.
  Fix ActionView label translation for more than 10 nested elements
  ...

1 files changed, 1 insertions, 0 deletions

diff --git a/activerecord/test/schema/schema.rb b/activerecord/test/schema/schema.rb
index 99a53434f6..5f2d6acbcb 100644
--- a/activerecord/test/schema/schema.rb
+++ b/activerecord/test/schema/schema.rb
@@ -198,6 +198,7 @@ ActiveRecord::Schema.define do
   end
 
   create_table :computers, force: true do |t|
+    t.string :system
     t.integer :developer, null: false
     t.integer :extendedWarranty, null: false
   end