How to Join two Queries in Sequelize - sql

Question

I tried to join two queries and based on it find the result. I am able to write the code in SQL. My SQL Code is
SELECT a.awbid,
m.mpscount
FROM ( select a.awbid
FROM awbmaster a
where a.batchid ='B/117/15022022'
and a.hubid ='117'
) as a
left join ( select count('mpsid') as "mpscount" ,
awbid from
mpsmaster m
where m.batchid = 'B/117/15022022'
group by "awbid"
) as m on a.awbid = m.awbid
But, I am not yet found any solution regarding the sequelize. How can I write the above SQL code in sequelize?

Answer 1

First, we can simplify this SQL query simply using a subquery to find out mpscount:
SELECT a.awbid,
(SELECT count(*)
FROM mpsmaster m
WHERE m.batchid = 'B/117/15022022'
AND m.awbid=a.awbid ) AS mpscount
FROM awbmaster a
WHERE a.batchid ='B/117/15022022'
AND a.hubid ='117'
Now if we already have both models MpsMaster and AwbMaster and a correct association between them then we can make a request something like this:
const records = AwbMaster.findAll(}
attributes: [
'awbid',
[Sequelize.literal('(SELECT count(*) FROM mpsmaster m WHERE m.batchid = \'B/117/15022022\' AND m.awbid=AwbMaster.awbid)'), 'mpscount']
]
})