Rails 控制台: 重载! 没有反映模型文件中的变化? 可能的原因是什么？

之前还好好的。我一直在玩配置游戏。也许我不知不觉中改变了一些配置。

下面是 Environment/development.rb 的配置

  config.cache_classes = false


# Log error messages when you accidentally call methods on nil.
config.whiny_nils = true


# Show full error reports and disable caching
config.consider_all_requests_local       = true
config.action_view.debug_rjs             = true
config.action_controller.perform_caching = false


# Don't care if the mailer can't send
config.action_mailer.raise_delivery_errors = false


# Print deprecation notices to the Rails logger
config.active_support.deprecation = :log


# Only use best-standards-support built into browsers
config.action_dispatch.best_standards_support = :builtin


# migration prefix with sequence #s
config.active_record.timestamped_migrations = false


#time zone
config.time_zone = 'UTC'

下面是 application.rb 的 config 部分

 # Configure the default encoding used in templates for Ruby 1.9.
config.encoding = "utf-8"


# Configure sensitive parameters which will be filtered from the log file.
config.filter_parameters += [:password]


config.active_record.schema_format = :sql

当我在 Rails 控制台上运行 reload! 时，它返回 true

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小开

Are you reloading the object from the database?

For example:

>> a = User.last
=> #<User id: 16, email: "asdfadsf@sdfdsf.com">
>> reload!
Reloading...
=> true

'a' won't reflect any changes to your model until you reload it from the db.

小开

最佳答案

reload! only reloads the latest code in the console environment. It does not re-initialize existing objects.

This means if you have already instantiated any objects, their attributes would not be updated - including newly introduced validations. However, if you create a new object, its attributes (and also validations) will reflect the reloaded code. more here