Thursday, March 30, 2017

laravel how to reduce queries for count, eager load?

Say I have 3 models

  • Users
  • Attendees
  • ScheduleProgramSegments

Attendees belongs to Users

  • User hasMany Attendees

Bookings is a pivot relation

  • Attendees belongsToMany ScheduledProgramSegments (pivot table = bookings)

I am getting the count of the pivot relation and I have about 600 too many queries because it keeps querying the count for each scheduled_program_segment_id...I do not know how to get them all in one query...eager load or otherwise.

Queries being run (shown by debugbar)

select * from `scheduled_program_segments` where `scheduled_program_segments`.`scheduled_program_id` = '477'410μs
select count(*) as aggregate from `attendees` inner join `bookings` on `attendees`.`id` = `bookings`.`attendee_id` where `bookings`.`scheduled_program_segment_id` = '1392' and `bookings`.`registered` = '1'450μs
select count(*) as aggregate from `attendees` inner join `bookings` on `attendees`.`id` = `bookings`.`attendee_id` where `bookings`.`scheduled_program_segment_id` = '1392' and `bookings`.`registered` = '1'390μs
select * from `scheduled_program_segments` where `scheduled_program_segments`.`scheduled_program_id` = '478'420μs
select count(*) as aggregate from `attendees` inner join `bookings` on `attendees`.`id` = `bookings`.`attendee_id` where `bookings`.`scheduled_program_segment_id` = '1393' and `bookings`.`registered` = '1'390μs
select count(*) as aggregate from `attendees` inner join `bookings` on `attendees`.`id` = `bookings`.`attendee_id` where `bookings`.`scheduled_program_segment_id` = '1393' and `bookings`.`registered` = '1'390μs
select * from `program_sessions` where `program_sessions`.`id` = '23' limit 1390μs
select * from `scheduled_program_segments` where `scheduled_program_segments`.`scheduled_program_id` = '478'450μs
select count(*) as aggregate from `attendees` inner join `bookings` on `attendees`.`id` = `bookings`.`attendee_id` where `bookings`.`scheduled_program_segment_id` = '1393' and `bookings`.`registered` = '1'390μs
select count(*) as aggregate from `attendees` inner join `bookings` on `attendees`.`id` = `bookings`.`attendee_id` where `bookings`.`scheduled_program_segment_id` = '1393' and `bookings`.`registered` = '1'380μs
select * from `scheduled_program_segments` where `scheduled_program_segments`.`scheduled_program_id` = '481'730μs
select count(*) as aggregate from `attendees` inner join `bookings` on `attendees`.`id` = `bookings`.`attendee_id` where `bookings`.`scheduled_program_segment_id` = '1396' and `bookings`.`registered` = '1'400μs
select count(*) as aggregate from `attendees` inner join `bookings` on `attendees`.`id` = `bookings`.`attendee_id` where `bookings`.`scheduled_program_segment_id` = '1396' and `bookings`.`registered` = '1'390μs
select count(*) as aggregate from `attendees` inner join `bookings` on `attendees`.`id` = `bookings`.`attendee_id` where `bookings`.`scheduled_program_segment_id` = '1397' and `bookings`.`registered` = '1'390μs
select count(*) as aggregate from `attendees` inner join `bookings` on `attendees`.`id` = `bookings`.`attendee_id` where `bookings`.`scheduled_program_segment_id` = '1398' and `bookings`.`registered` = '1'390μs
select count(*) as aggregate from `attendees` inner join `bookings` on `attendees`.`id` = `bookings`.`attendee_id` where `bookings`.`scheduled_program_segment_id` = '1399' and `bookings`.`registered` = '1'390μs
select count(*) as aggregate from `attendees` inner join `bookings` on `attendees`.`id` = `bookings`.`attendee_id` where `bookings`.`scheduled_program_segment_id` = '1400' and `bookings`.`registered` = '1'380μs
select count(*) as aggregate from `attendees` inner join `bookings` on `attendees`.`id` = `bookings`.`attendee_id` where `bookings`.`scheduled_program_segment_id` = '1401' and `bookings`.`registered` = '1'380μs
select count(*) as aggregate from `attendees` inner join `bookings` on `attendees`.`id` = `bookings`.`attendee_id` where `bookings`.`scheduled_program_segment_id` = '1402' and `bookings`.`registered` = '1'440μs
select count(*) as aggregate from `attendees` inner join `bookings` on `attendees`.`id` = `bookings`.`attendee_id` where `bookings`.`scheduled_program_segment_id` = '1403' and `bookings`.`registered` = '1'380μs
select count(*) as aggregate from `attendees` inner join `bookings` on `attendees`.`id` = `bookings`.`attendee_id` where `bookings`.`scheduled_program_segment_id` = '1404' and `bookings`.`registered` = '1'380μs
select count(*) as aggregate from `attendees` inner join `bookings` on `attendees`.`id` = `bookings`.`attendee_id` where `bookings`.`scheduled_program_segment_id` = '1405' and `bookings`.`registered` = '1'380μs
select count(*) as aggregate from `attendees` inner join `bookings` on `attendees`.`id` = `bookings`.`attendee_id` where `bookings`.`scheduled_program_segment_id` = '1406' and `bookings`.`registered` = '1'380μs
select count(*) as aggregate from `attendees` inner join `bookings` on `attendees`.`id` = `bookings`.`attendee_id` where `bookings`.`scheduled_program_segment_id` = '1407' and `bookings`.`registered` = '1'380μs
select count(*) as aggregate from `attendees` inner join `bookings` on `attendees`.`id` = `bookings`.`attendee_id` where `bookings`.`scheduled_program_segment_id` = '1408' and `bookings`.`registered` = '1'380μs
select count(*) as aggregate from `attendees` inner join `bookings` on `attendees`.`id` = `bookings`.`attendee_id` where `bookings`.`scheduled_program_segment_id` = '1409' and `bookings`.`registered` = '1'380μs
select count(*) as aggregate from `attendees` inner join `bookings` on `attendees`.`id` = `bookings`.`attendee_id` where `bookings`.`scheduled_program_segment_id` = '1410' and `bookings`.`registered` = '1'380μs
select count(*) as aggregate from `attendees` inner join `bookings` on `attendees`.`id` = `bookings`.`attendee_id` where `bookings`.`scheduled_program_segment_id` = '1411' and `bookings`.`registered` = '1'380μs
select count(*) as aggregate from `attendees` inner join `bookings` on `attendees`.`id` = `bookings`.`attendee_id` where `bookings`.`scheduled_program_segment_id` = '1412' and `bookings`.`registered` = '1'430μs
select count(*) as aggregate from `attendees` inner join `bookings` on `attendees`.`id` = `bookings`.`attendee_id` where `bookings`.`scheduled_program_segment_id` = '1413' and `bookings`.`registered` = '1'


via Phil
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