rails 4 - rake命令显示每次运行rake db：migrate命令时的弃用警告

Question

[pinterestclone]$ rake db:migrate  

DEPRECATION WARNING: Sprockets method `register_engine` is deprecated.  
Please register a mime type using `register_mime_type` then  
use `register_compressor` or `register_transformer`.  
https://github.com/rails/sprockets/blob/master/guides/extending_sprockets.md#supporting-all-versions-of-sprockets-in-processors  
 (called from block (2 levels) in <class:Railtie> at  /usr/local/lib/ruby/gems/2.3.0/gems/sass-rails-5.0.5/lib/sass/rails/railtie.rb:57)  

DEPRECATION WARNING: Sprockets method `register_engine` is deprecated.
Please register a mime type using `register_mime_type` then
use `register_compressor` or `register_transformer`.
https://github.com/rails/sprockets/blob/master/guides/extending_sprockets.md#supporting-all-versions-of-sprockets-in-processors
 (called from block (2 levels) in <class:Railtie> at /usr/local/lib/ruby/gems/2.3.0/gems/sass-rails-5.0.5/lib/sass/rails/railtie.rb:58)

== 20160721232702 AddUserIdToPins: migrating ==================================  
-- add_column(:pins, :user_id, :integer)  
   -> 0.0010s  
-- add_index(:pins, :user_id)  
   -> 0.0010s  
== 20160721232702 AddUserIdToPins: migrated (0.0022s) =========================

Answer 1

这是由Sprockets 3.7.0引起的，应该很快在sass-rails（使用Sprockets）中修复。有关详细信息，请参阅this。

我猜Sprockets 4要求你在调用register_engine之前注册一个mime类型。

更新：现在已在sass-rails版本5.0.6中修复此问题。运行bundle update应删除弃用警告。

Answer 2

要解决此问题，请在终端中打开您的项目并编写“bundle update sprockets”