Sur le jeu de caractères de MySQL "utf8mb4", même la console rails fonctionne bien, mais seed_fu ne fonctionne pas bien

Question

Sur le jeu de caractères de MySQL "utf8mb4",
la console rails fonctionne bien comme ça.

<pre> 
<p style="background-color:#FFFFFF;border:1px solid #999999;padding:5px;"> 
10191% rails c -e production                                 Loading production environment (Rails 4.2.5) 
irb(main):001:0> skin = Skin.first 
    Skin Load (203.9ms) SELECT `skins`.* FROM `skins` ORDER BY `skins`.`id` ASC LIMIT 1 
=> #<Skin id: 1, created_at: "2015-12-19 07:59:48", updated_at: "2015-12-19 08:08:34", name: "", file: "standard.css", expression: ""> 
irb(main):002:0> skin.name = 'たのしい'' 
irb(main):003:0' 
irb(main):004:0' ' 
=> "たのしい\n\n" 
irb(main):005:0> skin.name = 'たのしい' 
=> "たのしい" 
irb(main):006:0> skin.save 
    (112.3ms) BEGIN 
    SQL (115.0ms) UPDATE `skins` SET `name` = 'たのしい', `updated_at` = '2015-12-19 11:56:18' WHERE `skins`.`id` = 1 
    (105.7ms) COMMIT 
=> true 
</p> 
</pre> 

Mais "rake db: seed_fu" ne court pas bien comme ça.

<pre> 
<p style="background-color:#FFFFFF;border:1px solid #999999;padding:5px;"> 
10192% rake db:seed_fu RAILS_ENV=production 
== Seed from /Users/js/work/picrating/db/fixtures/production/publish.rb 
- Publish {:id=>1, :name=>"公開"} 
- Publish {:id=>2, :name=>"非公開"} 

== Seed from /Users/js/work/picrating/db/fixtures/production/skin.rb 
- Skin {:id=>1, :name=>"standard", :file=>"standard.css", :expression=>"レギュラー"} 
- Skin {:id=>2, :name=>"light", :file=>"light.css", :expression=>"たのしい"} 
rake aborted! 
ActiveRecord::StatementInvalid: Mysql2::Error: Incorrect string value: '\xF0\x9F\x8C\xBB' for column 'expression' at row 1: INSERT INTO `skins` (`id`, `name`, `file`, `expression`, `created_at`, `updated_at`) VALUES (2, 'light', 'light.css', 'たのしい', '2015-12-19 12:08:05', '2015-12-19 12:08:05') 
(eval):1:in `block (2 levels) in run_file' 
Mysql2::Error: Incorrect string value: '\xF0\x9F\x8C\xBB' for column 'expression' at row 1 
(eval):1:in `block (2 levels) in run_file' 
Tasks: TOP => db:seed_fu 
(See full trace by running task with --trace) 

</p> 
</pre> 

Je ne sais pas, que des rails même console fonctionne bien, mais
db: seed_fu ne fonctionne pas très bien.
Que s'est-il passé?

Answer 1

Est-ce une indication suffisante?

Dans application_controller.rb

def configure_charsets 
    response.headers["Content-Type"] = "text/html; charset=utf-8" 
    suppress(ActiveRecord::StatementInvalid) do 
     ActiveRecord::Base.connection.execute 'SET NAMES utf8mb4' 
    end 
    end