Return updated values from sequelize raw query - postgresql

Question

I have an operation that uses a raw query to update the database, i'd like to get the rows affected by the query as the output. Is this possible?
const op = (replacements, pgdb) {
const query = q(replacements);
const args = [query, { replacements, type: Sequelize.QueryTypes.UPDATE, raw: true }];
const results = await pgdb.query(...args);
console.log(results);
return results;
};

Answer 1

Postgresql can return records with RETURNING.
UPDATE T
SET ...
WHERE ...
RETURNING *

Answer 2

Yes you can. I'm using Sequelize with a PostgreSQL database. My specs are as follows:
"pg": "^7.12.1"
"sequelize": "^5.21.2"
"sequelize-cli": "^5.5.1"
I ran an update query in the following code block:
const query = `UPDATE bookings b
SET "isPaid" = :isPaid,
"paymentType" = :paymentType
FROM trips t,
requests r
WHERE "b"."tripId" = t.id
AND r.id = "t"."requestId"
AND r.id = :requestId
AND "r"."userId" = :userId
RETURNING b.id, "isPaid", "paymentType"`;
return db.sequelize.query(
query, {
replacements: {
isPaid, paymentType, requestId, userId
}
}
);
I logged the result:
console.log('resultFromQuery', resultFromQuery);
and got the following:
resultFromQuery [
[
{ id: 7, isPaid: true, paymentType: 'paypal' },
{ id: 8, isPaid: true, paymentType: 'paypal' }
],
Result {
command: 'UPDATE',
rowCount: 2,
oid: null,
rows: [ [Object], [Object] ],
fields: [ [Field], [Field], [Field] ],
_parsers: [ [Function: parser], [Function: parser], [Function: parser] ],
_types: TypeOverrides { _types: [Object], text: {}, binary: {} },
RowCtor: null,
rowAsArray: false
}
]
I was then able to get the rowCount as follows:
console.log('resultFromQuery', resultFromQuery[1].rowCount);
I was also able to get the updated rows themselves as follows (you can select the entire row like you did with '*' or specify the fields you want):
console.log('resultFromQuery', resultFromQuery[0]);