The default is set to false because fetching the relations deletes previously fetched relations =P. This is, if you fetched an aggregated value (SUM, COUNT), it wont be refreshed, it will be overwritten by the actual related values.
The default is set to false because fetching the relations deletes previously fetched relations =P. This is, if you fetched an aggregated value (SUM, COUNT), it wont be refreshed, it will be overwritten by the actual related values.