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module ActiveRecord::ConnectionAdapters::QueryCache

Attributes

[RW] query_cache

Public class methods

Source code GitHub
# File activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb, line 19
        def dirties_query_cache(base, *method_names)
          method_names.each do |method_name|
            base.class_eval <<-end_code, __FILE__, __LINE__ + 1
              def #{method_name}(...)
                ActiveRecord::Base.clear_query_caches_for_current_thread
                super
              end
            end_code
          end
        end
Source code GitHub
# File activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb, line 160
def initialize(*)
  super
  @query_cache = nil
end

Public instance methods

Enable the query cache within the block.

Source code GitHub
# File activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb, line 170
def cache(&)
  pool.enable_query_cache(&)
end

Clears the query cache.

One reason you may wish to call this method explicitly is between queries that ask the database to randomize results. Otherwise the cache would see the same SQL query and repeatedly return the same result each time, silently undermining the randomness you were expecting.

Source code GitHub
# File activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb, line 193
def clear_query_cache
  pool.clear_query_cache
end
Source code GitHub
# File activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb, line 183
def disable_query_cache!
  pool.disable_query_cache!
end
Source code GitHub
# File activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb, line 174
def enable_query_cache!
  pool.enable_query_cache!
end
Source code GitHub
# File activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb, line 165
def query_cache_enabled
  @query_cache&.enabled?
end

Disable the query cache within the block.

Source code GitHub
# File activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb, line 179
def uncached(&)
  pool.disable_query_cache(&)
end

Definition files