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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?
connection.cache(&block)
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.
def uncached(&block)
if connected?
connection.uncached(&block)
else
yield
end
end
end
def self.run
connection = ActiveRecord::Base.connection
enabled = connection.query_cache_enabled
connection_id = ActiveRecord::Base.connection_id
connection.enable_query_cache!
[enabled, connection_id]
end
def self.complete(state)
enabled, connection_id = state
ActiveRecord::Base.connection_id = connection_id
ActiveRecord::Base.connection.clear_query_cache
ActiveRecord::Base.connection.disable_query_cache! unless enabled
end
def self.install_executor_hooks(executor = ActiveSupport::Executor)
executor.register_hook(self)
executor.to_complete do
unless ActiveRecord::Base.connection.transaction_open?
ActiveRecord::Base.clear_active_connections!
end
end
end
end
end
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