method

cache_version

v7.2.3 - Show latest stable - Class: ActiveRecord::Integration

cache_version()

public

Returns a cache version that can be used together with the cache key to form a recyclable caching scheme. By default, the #updated_at column is used for the cache_version, but this method can be overwritten to return something else.

Note, this method will return nil if ActiveRecord::Base.cache_versioning is set to false.

# File activerecord/lib/active_record/integration.rb, line 97
    def cache_version
      return unless cache_versioning

      if has_attribute?("updated_at")
        timestamp = updated_at_before_type_cast
        if can_use_fast_cache_version?(timestamp)
          raw_timestamp_to_cache_version(timestamp)

        elsif timestamp = updated_at
          timestamp.utc.to_fs(cache_timestamp_format)
        end
      elsif self.class.has_attribute?("updated_at")
        raise ActiveModel::MissingAttributeError, "missing attribute 'updated_at' for #{self.class}"
      end
    end

cache_version

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