Rails3 - 使用 Rails.cache.fetch 在开发模式下缓存

问题描述

在开发中，以下(简化的)语句总是记录缓存未命中，在生产中它按预期工作:

In development, the following (simplified) statement always logs a cache miss, in production it works as expected:

@categories = Rails.cache.fetch("categories", :expires_in => 5.minutes) do
  Rails.logger.info "+++ Cache missed +++"
  Category.all
end

如果我在 config/development.rb 中将 config.cache_classes 从 false 更改为 true，它在开发模式下也能正常工作，但是，这会使开发变得相当痛苦.是否有任何类似于 config.cache_classes = false 的配置设置，除非 Rails.cache.fetch 尽可能从缓存中获取?

If I change config.cache_classes from false to true in config/development.rb, it works as well in development mode, however, this makes development rather painful. Is there any configuration setting that is like config.cache_classes = false except that Rails.cache.fetch is fetching from cache if possible?

推荐答案

尝试在 /config/environments/development.rb 中放置以下内容:

Try placing the following in /config/environments/development.rb:

# Temporarily enable caching in development (COMMENT OUT WHEN DONE!)
config.action_controller.perform_caching = true

此外，如果您的缓存存储配置位于 /config/environments/production.rb，那么您还需要将相应的行复制到 development.rb.例如，如果您的缓存存储是 Dalli memcache gem:

Additionally, if your cache store configuration is in /config/environments/production.rb, then you will need to copy the appropriate line into development.rb as well. For example, if your cache store is the Dalli memcache gem:

# copied from production.rb into development.rb for caching in development
config.cache_store = :dalli_store, '127.0.0.1'

希望有所帮助.

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