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* | | Runs the generator before assertionsyuuji.yaginuma2018-10-121-0/+1
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* | | Add test retries for railtiesGannon McGibbon2018-10-111-0/+3
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* | | Add multi-db support to rails db:migrate:statusGannon McGibbon2018-10-092-19/+56
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* | | Use `--skip-webpack-install` by defaultyuuji.yaginuma2018-10-093-7/+7
| | | | | | | | | | | | To remove extra `--no-skip-javascript` tests.
* | | Avoid `webpacker:install` if unnecessaryyuuji.yaginuma2018-10-093-6/+7
| | | | | | | | | | | | | | | `webpacker:install` also includes execution of yarn, it takes time to execute, so avoid unnecessary tests.
* | | Add `skip-webpack-install` optionyuuji.yaginuma2018-10-093-1/+22
| |/ |/| | | | | | | This option is useful when want to check only the files generated by `rails new`, or if want to do something before `webpacker:install`.
* | Merge pull request #34084 from trustvox/masterRafael França2018-10-052-4/+2
|\ \ | | | | | | Remove "include FileUtils" sentence in setup/update bin files
| * | Remove "include FileUtils" sentence in setup/update bin filesBruno Casali2018-09-172-4/+2
| | | | | | | | | | | | | | | According with rubocop style guide "Style/MixinUsage" is good to use only in class/module not directly in file.
* | | Remove bundler warnings from bin/setup outputGannon McGibbon2018-10-051-8/+10
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* | | Fix tests related to new JavaScript path for generatorsPrathamesh Sonpatki2018-10-054-8/+6
| | | | | | | | | | | | - Followup of https://github.com/rails/rails/commit/4838c1716a0340137d858fab49bf460e23be5a4b
* | | Add retry_on/discard suggestions for common cases.Francesco Rodríguez2018-10-051-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | This adds the same suggestions added here: https://github.com/rails/rails/blob/01a69e27a4e55504af8fe776826d659550e6f89e/activejob/lib/rails/generators/job/templates/application_job.rb These appear when `app/jobs/application_job.rb` doesn't exist, but not for new applications.
* | | Avoid `webpacker:install` if unnecessaryyuuji.yaginuma2018-10-051-2/+2
| | | | | | | | | | | | | | | Since this is a test to check the behavior of `load_defaults`, webpacker is unnecessary.
* | | Revert "Merge pull request #33970 from rails/eager-url-helpers"schneems2018-10-032-14/+4
| | | | | | | | | | | | | | | | | | | | | Until #34050 can be resolved This reverts commit 7f870a5ba2aa9177aa4a0e03a9d027928ba60e49, reversing changes made to 6556898884d636c59baae008e42783b8d3e16440.
* | | Fix call sitesGannon McGibbon2018-10-021-1/+1
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* | | Make Webpacker the default JavaScript compiler for Rails 6 (#33079)David Heinemeier Hansson2018-09-3034-291/+160
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * Use Webpacker by default on new apps * Stop including coffee-rails by default * Drop using a js_compressor by default * Drop extra test for coffeescript inclusion by default * Stick with skip_javascript to signify skipping webpack * Don't install a JS runtime by default any more * app/javascript will be the new default directory for JS * Make it clear that this is just for configuring the default Webpack framework setup now * Start using the Webpack tag in the default layout * Irrelevant test * jQuery is long gone * Stop having asset pipeline compile default application.js * Add rails-ujs by default to the Webpack setup * Add Active Storage JavaScript to application.js pack by default * Consistent quoting * Add Turbolinks to default pack * Add Action Cable to default pack Need some work on how to set the global consumer that channels will work with. @javan? * Require all channels by default and use a separate consumer stub * Channel generator now targets Webpack style * Update task docs to match new generator style * Use uniform import style * Drop the JS assets generator It was barely helpful as it was. It’s no longer helpful in a Webpacked world. Sayonara! * Add app/javascript to the stats directories * Simpler import style Which match the other imports. * Address test failures from dropping JS compilation (and compression) * webpacker-default: Modify `AssetsGeneratorTest` Before: ``` $ bin/test test/generators/assets_generator_test.rb Run options: --seed 46201 F Failure: AssetsGeneratorTest#test_assets [/Users/ttanimichi/ghq/github.com/ttanimichi/rails/railties/test/generators/assets_generator_test.rb:12]: Expected file "app/assets/javascripts/posts.js" to exist, but does not bin/test /Users/ttanimichi/ghq/github.com/ttanimichi/rails/railties/test/generators/assets_generator_test.rb:10 . Finished in 0.031343s, 63.8101 runs/s, 95.7152 assertions/s. 2 runs, 3 assertions, 1 failures, 0 errors, 0 skips ``` After: ``` $ bin/test test/generators/assets_generator_test.rb Run options: --seed 43571 .. Finished in 0.030370s, 65.8545 runs/s, 65.8545 assertions/s. 2 runs, 2 assertions, 0 failures, 0 errors, 0 skips ``` * webpacker-default: Modify `ChannelGeneratorTest` Before: ``` $ bin/test test/generators/channel_generator_test.rb Run options: --seed 8986 .F Failure: ChannelGeneratorTest#test_channel_with_multiple_actions_is_created [/Users/ttanimichi/ghq/github.com/ttanimichi/rails/railties/test/generators/channel_generator_test.rb:43]: Expected file "app/assets/javascripts/channels/chat.js" to exist, but does not bin/test /Users/ttanimichi/ghq/github.com/ttanimichi/rails/railties/test/generators/channel_generator_test.rb:34 .F Failure: ChannelGeneratorTest#test_channel_is_created [/Users/ttanimichi/ghq/github.com/ttanimichi/rails/railties/test/generators/channel_generator_test.rb:29]: Expected file "app/assets/javascripts/channels/chat.js" to exist, but does not bin/test /Users/ttanimichi/ghq/github.com/ttanimichi/rails/railties/test/generators/channel_generator_test.rb:22 E Error: ChannelGeneratorTest#test_cable_js_is_created_if_not_present_already: Errno::ENOENT: No such file or directory @ apply2files - /Users/ttanimichi/ghq/github.com/ttanimichi/rails/railties/test/fixtures/tmp/app/assets/javascripts/cable.js bin/test /Users/ttanimichi/ghq/github.com/ttanimichi/rails/railties/test/generators/channel_generator_test.rb:60 F Failure: ChannelGeneratorTest#test_channel_suffix_is_not_duplicated [/Users/ttanimichi/ghq/github.com/ttanimichi/rails/railties/test/generators/channel_generator_test.rb:87]: Expected file "app/assets/javascripts/channels/chat.js" to exist, but does not bin/test /Users/ttanimichi/ghq/github.com/ttanimichi/rails/railties/test/generators/channel_generator_test.rb:80 F Failure: ChannelGeneratorTest#test_channel_on_revoke [/Users/ttanimichi/ghq/github.com/ttanimichi/rails/railties/test/generators/channel_generator_test.rb:77]: Expected file "app/assets/javascripts/cable.js" to exist, but does not bin/test /Users/ttanimichi/ghq/github.com/ttanimichi/rails/railties/test/generators/channel_generator_test.rb:68 Finished in 0.064384s, 108.7227 runs/s, 481.4861 assertions/s. 7 runs, 31 assertions, 4 failures, 1 errors, 0 skips ``` After: ``` $ bin/test test/generators/channel_generator_test.rb Run options: --seed 44857 ....... Finished in 0.060243s, 116.1961 runs/s, 697.1764 assertions/s. 7 runs, 42 assertions, 0 failures, 0 errors, 0 skips ``` * Fix shared generator tests. * webpacker-default: Modify `ControllerGeneratorTest` The JS assets generator was dropped. ref. https://github.com/rails/rails/commit/46215b179483d3e4d264555f5a4952f43eb8142a * Revert "Simpler import style". It's currently failing with an error of "TypeError: undefined is not an object (evaluating '__WEBPACK_IMPORTED_MODULE_2_activestorage___default.a.start')". Waiting for @javan to have a look. This reverts commit 5d3ebb71059f635d3756cbda4ab9752027e09256. * require webpacker in test app * Add webpacker without making the build hang/timeout. (#33640) * use yarn workspaces to allow for installing unreleased packages and only generate js/bootsnap when required * no longer need to have webpacker in env templates as webpacker moved this config to yml file * Fix rubocop violation * Got the test passing for the running scaffold * update expected lines of code * update middleware tests to account for webpacker * disable js in plugins be default to get the tests passing (#34009) * clear codeclimate report issues * Anything newer than currently released is good * Use Webpacker development version during development of Rails * Edge should get development webpacker as well * Add changelog entry for Webpacker change
* | | Add `Style/RedundantFreeze` to remove redudant `.freeze`Yasuo Honda2018-09-294-8/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since Rails 6.0 will support Ruby 2.4.1 or higher `# frozen_string_literal: true` magic comment is enough to make string object frozen. This magic comment is enabled by `Style/FrozenStringLiteralComment` cop. * Exclude these files not to auto correct false positive `Regexp#freeze` - 'actionpack/lib/action_dispatch/journey/router/utils.rb' - 'activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb' It has been fixed by https://github.com/rubocop-hq/rubocop/pull/6333 Once the newer version of RuboCop released and available at Code Climate these exclude entries should be removed. * Replace `String#freeze` with `String#-@` manually if explicit frozen string objects are required - 'actionpack/test/controller/test_case_test.rb' - 'activemodel/test/cases/type/string_test.rb' - 'activesupport/lib/active_support/core_ext/string/strip.rb' - 'activesupport/test/core_ext/string_ext_test.rb' - 'railties/test/generators/actions_test.rb'
* | | Reset `ActiveRecord::Base.configurations` to the value beforeyuuji.yaginuma2018-09-291-1/+2
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* | | Refactor migrations_path command option to databaseGannon McGibbon2018-09-285-13/+48
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* | | Add migrations_paths option to model generatorGannon McGibbon2018-09-273-0/+31
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* | | Merge branch 'master' into eager-url-helpersAaron Patterson2018-09-262-3/+3
|\ \ \ | | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * master: Remove force parent loading when counter cache child is created/destroyed Raise an error when loading all fixtures from nil fixture_path Revert "Remove `counter_cache_target` which is no longer called" Update counter cache in memory if parent target is existed If association is a hash-like object preloading fails Use the same option for create database statements between Raketask and travis.rb Fix "warning: shadowing outer local variable - config" Remove `counter_cache_target` which is no longer called Fix more offences Change the empty block style to have space inside of the block Fix a content_for test description Stringify database configurations Improve error message when assign wrong attributes to model
| * | Change the empty block style to have space inside of the blockRafael Mendonça França2018-09-252-3/+3
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* | | Routes from Engine Railties should not be an infinite loopAaron Patterson2018-09-261-0/+6
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* | | Eager load supports individual filesAaron Patterson2018-09-262-4/+8
|/ / | | | | | | Also we want to eager load routes before anything else.
* | Eagerly define attribute methods in productionEugene Kenny2018-09-241-0/+47
| | | | | | | | | | | | | | | | | | | | | | | | | | The attribute methods for a model are currently defined lazily the first time that model is instantiated, even when `config.eager_load` is true. This means the first request to use each model incurs the cost, which usually involves a database round trip to fetch the schema definition. By defining the attribute methods for all models while the application is booting, we move that work out of any individual request. When using a forking web server, this also reduces the number of times the schema definition is queried by doing it once in the parent process instead of from each forked process during their first request.
* | Merge pull request #33949 from sjain1107/no-private-defKasper Timm Hansen2018-09-231-8/+10
|\ \ | | | | | | Remove private def
| * | Remove private defSakshi Jain2018-09-231-8/+10
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* | | Enable `Performance/UnfreezeString` copyuuji.yaginuma2018-09-239-9/+9
|/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In Ruby 2.3 or later, `String#+@` is available and `+@` is faster than `dup`. ```ruby # frozen_string_literal: true require "bundler/inline" gemfile(true) do source "https://rubygems.org" gem "benchmark-ips" end Benchmark.ips do |x| x.report('+@') { +"" } x.report('dup') { "".dup } x.compare! end ``` ``` $ ruby -v benchmark.rb ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-linux] Warming up -------------------------------------- +@ 282.289k i/100ms dup 187.638k i/100ms Calculating ------------------------------------- +@ 6.775M (± 3.6%) i/s - 33.875M in 5.006253s dup 3.320M (± 2.2%) i/s - 16.700M in 5.032125s Comparison: +@: 6775299.3 i/s dup: 3320400.7 i/s - 2.04x slower ```
* | Make sure this test check the issue solved in #31135Rafael Mendonça França2018-09-221-6/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Before this change this test was passing even if we revert #31135. The reason for that is that `app 'development'` will load the environment in the test process and it is happening before db_create_and_drop is called. This was not asserting that the environment was loaded in the db:create task itself. To test it we enhance the db:create task with a block that writes to a tmp file the value of the config. If the environment is loaded before that task enhancement runs the content of the file will have "true" insteand of "false".
* | Switch to supports_cache_versioning? check to a class methodschneems2018-09-202-2/+4
| | | | | | | | | | - Moving the `supports_cache_versioning?` check to a class method. - Shorten the method doc. - Expand on the error message.
* | [close #33907] Error when using "recyclable" cache keys with a store that ↵schneems2018-09-202-0/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | does not support it If you are using the "in cache versioning" also known as "recyclable cache keys" the cache store must be aware of this scheme, otherwise you will generate cache entries that never invalidate. This PR adds a check to the initialization process to ensure that if recyclable cache keys are being used via ``` config.active_record.cache_versioning = true ``` Then the cache store needs to show that it supports this versioning scheme. Cache stores can let Rails know that they support this scheme by adding a method `supports_in_cache_versioning?` and returning true.
* | Fixed to RAILS_MASTER_KEY as a default env key for decrypting.Wojciech Wnętrzak2018-09-204-12/+8
| | | | | | | | | | Fixes mistake left in https://github.com/rails/rails/pull/33521/files#diff-2a29095afcfe2c683b82a779a94c2208R59 and misunderstanding in https://github.com/rails/rails/commit/d69b04de0ff33237209afea6f6cac3ab27934908
* | Fix env name for master keyyuuji.yaginuma2018-09-203-3/+3
| | | | | | | | When using environment specific credentials, `RAILS_MASTER_KEY` is not used.
* | Support environment specific credentials file. (#33521)Wojciech Wnętrzak2018-09-197-29/+163
|/ | | | | | For `production` environment look first for `config/credentials/production.yml.enc` file that can be decrypted by `ENV["RAILS_MASTER_KEY"]` or `config/credentials/production.key` master key. Edit given environment credentials file by command `rails credentials:edit --environment production`. Default behavior can be overwritten by setting `config.credentials.content_path` and `config.credentials.key_path`.
* Add test for `config.active_storage.routes_prefix`yuuji.yaginuma2018-09-151-0/+18
| | | | Follow up #33883.
* Remove mysql2 gem version requirement "< 0.6.0"Yasuo Honda2018-09-142-2/+2
| | | | Suggested at https://github.com/rails/rails/pull/33876#issuecomment-421176221
* Bump MySQL version requirement to 5.5.8 in the template filesYasuo Honda2018-09-132-2/+2
| | | | Follow-up #33853
* Validate if `utf8mb4` character set and longer index key prefix is supportedYasuo Honda2018-09-131-1/+0
| | | | | | | | | | | Once #33608 merged If users create a new database using MySQL 5.1.x, it will fail to create databases since MySQL 5.1 does not know `utf8mb4` character set. This pull request removes `encoding: utf8mb4` from `mysql.yml.tt` to let create_database method handles default character set by MySQL server version. `supports_longer_index_key_prefix?` method will need to validate if MySQL 5.5 and 5.6 server configured correctly to support longer index key prefix, but not yet.
* Add a test that exercice better the behavior we expect in the query cacheRafael Mendonça França2018-09-121-2/+43
| | | | | | | In production the query cache was already being loaded before the first request even without #33856, so added a test to make sure of it. This new test is passing even if #33856 is reverted.
* Build string set when `filter_attributes` is assignedbogdanvlviv2018-09-121-1/+2
| | | | | | | | | It would allow `filter_attributes` to be reused across multiple calls to `#inspect` or `#pretty_print`. - Add `require "set"` - Remove `filter_attributes` instance reader. I think there is no need to keep it.
* Fix query cache to load before first requestEileen Uchitelle2018-09-121-0/+33
| | | | | | | | | | | | | | | | In a test app we observed that the query cache was not enabled on the first request. This was because the query cache hooks are installed on load and active record is loaded in the middle of the first request. If we remove the `on_load` from the railtie the query cache hooks will be installed before the first request, allowing the cache to be enabled on that first request. This is ok because query cache doesn't load anything else, only itself so we're not eager loading all of active record before the first request, just the query cache hooks. [Eileen M. Uchitelle & Matthew Draper]
* Merge pull request #33819 from kevindew/yarn-pathRafael França2018-09-111-1/+1
|\ | | | | Run yarn install relative to Rails.root
| * Run yarn install relative to Rails.rootKevin Dew2018-09-071-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We may not always have binstubs relative to the directory we are running the rake task from. The particular case for this is with a mountable Rails engine and dummy app that is created to test it. This sets all the tasks up to run under an `app` namespace in railties/lib/rails/tasks/engine.rake This change resolves a problem whereby running `app:yarn:install` would have no effect as it would try to run in the plugins bin directory rather than the test/dummy/bin. This also means that it installs from test/dummy/package.json and into test/dummy/node_modules which is behaviour consistent with a normal Rails app. On a rails engine: ``` ➜ tmp rails plugin new rails-plugin --mountable ➜ tmp cd rails-plugin ``` Before this change: ``` ➜ rails-plugin rake app:yarn:install ➜ rails-plugin ``` After this change: ``` ➜ rails-plugin rake app:yarn:install yarn install v1.9.4 info No lockfile found. [1/4] 🔍 Resolving packages... [2/4] 🚚 Fetching packages... [3/4] 🔗 Linking dependencies... [4/4] 📃 Building fresh packages... ✨ Done in 0.07s. ``` When this change is ran against a normal rails install there is not a behavioural change: ``` ➜ tmp rails new full-app ➜ tmp cd full-app ➜ full-app git:(master) ✗ rake yarn:install yarn install v1.9.4 info No lockfile found. [1/4] 🔍 Resolving packages... [2/4] 🚚 Fetching packages... [3/4] 🔗 Linking dependencies... [4/4] 📃 Building fresh packages... ✨ Done in 0.09s. ```
* | Merge pull request #33483 from DylanReile/masterRafael França2018-09-111-0/+2
|\ \ | | | | | | Disable content security policy for mailer previews
| * | Disable content security policy for mailer previewsDylan Reile2018-07-301-0/+2
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* | | Merge pull request #33815 from mberlanda/mberlanda/enhance-config-forRafael França2018-09-112-3/+53
|\ \ \ | | | | | | | | Use ActiveSupport::InheritableOptions and deep_symbolize_keys in config_for
| * | | refacto: config_for with ActiveSupport::InheritableOptions and symbolized keysMauro Berlanda2018-09-112-3/+53
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* | | use "minitest" consistentlyXavier Noria2018-09-113-5/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | The name of the minitest library is spelled that way: regular font, and lowercase. Lowercase is used even at the beginning of sentences, see http://docs.seattlerb.org/minitest/ I double-checked this with @zenspider too (thanks!).
* | | Merge pull request #33785 from bogdanvlviv/follow-up-33773-33779Rafael França2018-09-111-1/+1
|\ \ \ | | | | | | | | Clarify changelog entry added in #33779 [ci skip]
| * | | Clarify changelog entry added in #33779 [ci skip]bogdanvlviv2018-09-031-1/+1
| | | | | | | | | | | | | | | | Related to #33773
* | | | Use utf8mb4 character set by default for MySQL database (#33608)Yasuo Honda2018-09-111-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * Use utf8mb4 character set by default `utf8mb4` character set supports supplementary characters including emoji. `utf8` character set with 3-Byte encoding is not enough to support them. There was a downside of 4-Byte length character set with MySQL 5.5 and 5.6: "ERROR 1071 (42000): Specified key was too long; max key length is 767 bytes" for Rails string data type which is mapped to varchar(255) type. MySQL 5.7 supports 3072 byte key prefix length by default. * Remove `DEFAULT COLLATE` from Active Record unit test databases There should be no "one size fits all" collation in MySQL 5.7. Let MySQL server choose the default collation for Active Record unit test databases. Users can choose their best collation for their databases by setting `options[:collation]` based on their requirements. * InnoDB FULLTEXT indexes support since MySQL 5.6 it does not have to use MyISAM storage engine whose maximum key length is 1000 bytes. Using MyISAM storag engine with utf8mb4 character set would cause "Specified key was too long; max key length is 1000 bytes" https://dev.mysql.com/doc/refman/5.6/en/innodb-fulltext-index.html * References "10.9.1 The utf8mb4 Character Set (4-Byte UTF-8 Unicode Encoding)" https://dev.mysql.com/doc/refman/5.7/en/charset-unicode-utf8mb4.html "10.9.2 The utf8mb3 Character Set (3-Byte UTF-8 Unicode Encoding)" https://dev.mysql.com/doc/refman/5.7/en/charset-unicode-utf8.html "14.8.1.7 Limits on InnoDB Tables" https://dev.mysql.com/doc/refman/5.7/en/innodb-restrictions.html > If innodb_large_prefix is enabled (the default), the index key prefix limit is 3072 bytes > for InnoDB tables that use DYNAMIC or COMPRESSED row format. * CI against MySQL 5.7 Followed this instruction and changed root password to empty string. https://docs.travis-ci.com/user/database-setup/#MySQL-57 * The recommended minimum version of MySQL is 5.7.9 to support utf8mb4 character set and `innodb_default_row_format` MySQL 5.7.9 introduces `innodb_default_row_format` to support 3072 byte length index by default. Users do not have to change MySQL database configuration to support Rails string type. https://dev.mysql.com/doc/refman/5.7/en/innodb-parameters.html#sysvar_innodb_default_row_format https://dev.mysql.com/doc/refman/5.7/en/innodb-restrictions.html > If innodb_large_prefix is enabled (the default), > the index key prefix limit is 3072 bytes for InnoDB tables that use DYNAMIC or COMPRESSED row format. * The recommended minimum version of MariaDB is 10.2.2 MariaDB 10.2.2 is the first version of MariaDB supporting `innodb_default_row_format` Also MariaDB says "MySQL 5.7 is compatible with MariaDB 10.2". - innodb_default_row_format https://mariadb.com/kb/en/library/xtradbinnodb-server-system-variables/#innodb_default_row_format - "MariaDB versus MySQL - Compatibility" https://mariadb.com/kb/en/library/mariadb-vs-mysql-compatibility/ > MySQL 5.7 is compatible with MariaDB 10.2 - "Supported Character Sets and Collations" https://mariadb.com/kb/en/library/supported-character-sets-and-collations/
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