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# frozen_string_literal: true
module ActiveRecord
# = Active Record Query Cache
class QueryCache
module ClassMethods
# Enable the query cache within the block if Active Record is configured.
# If it's not, it will execute the given block.
def cache(&block)
if connected? || !configurations.empty?
pool = connection_pool
was_enabled = pool.query_cache_enabled
begin
pool.enable_query_cache(&block)
ensure
pool.clear_query_cache unless was_enabled
end
else
yield
end
end
# Disable the query cache within the block if Active Record is configured.
# If it's not, it will execute the given block.
#
# Set <tt>dirties: false</tt> to prevent query caches on all connections from being cleared by write operations.
# (By default, write operations dirty all connections' query caches in case they are replicas whose cache would now be outdated.)
def uncached(dirties: true, &block)
if connected? || !configurations.empty?
connection_pool.disable_query_cache(dirties: dirties, &block)
else
yield
end
end
end
def self.run
ActiveRecord::Base.connection_handler.each_connection_pool.reject(&:query_cache_enabled).each do |pool|
next if pool.db_config&.query_cache == false
pool.enable_query_cache!
end
end
def self.complete(pools)
pools.each do |pool|
pool.disable_query_cache!
pool.clear_query_cache
end
end
def self.install_executor_hooks(executor = ActiveSupport::Executor)
executor.register_hook(self)
end
end
end
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