PG Promise error when select then insert the data - node.js

Question

i got error on my pg-promise like this:
this is my snippet code:
// create sample payload
let samplePayload = [];
for (let index = 0; index < 10; index++) {
samplePayload.push({
id: uuidv1(),
});
}
return db.task((t) => {
samplePayload.map( sp => {
// i want check if the id is exist on db
let sql = `select * from sf_data where id = '${sp.id}'`;
console.log(sql)
const sampleBatch = t.any(sql).then(th => {
// i want insert it if data not exists
console.log(th);
});
})
});
i want to check if the list of data is exist in DF. If not exists, need to insert the data.
i try to fix my old code and change into this
const sfdata = await t.any('SELECT * FROM sf_data');
const queries = sfdata.map((sp) => {
return t.oneOrNone('select * from sf_data where id = ${id}', sp).then(result => {
console.log(result)
if(result){
t.tx(async t2 => {
return t2.none("insert into test_sf values ($1, $2, $3)", [uuidv1(), result.id, result.sfid]);
})
}
});
});
return t.batch(queries);
but it return error:
(node:6547) UnhandledPromiseRejectionWarning: Error: Client was closed and is not queryable
at /Users/dsa/Telkom/dtp-dsa-middleware-sf/node_modules/pg/lib/client.js:570:27
at processTicksAndRejections (internal/process/task_queues.js:75:11)
any clue about this?

Answer 1

You are missing return in a few places, and your code creates a bunch of loose promises - queries that are trying to execute outside the connection, hence the error.
Here's correct code:
return db.task(t => {
const queries = samplePayload.map(sp => {
return t.any('select * from sf_data where id = ${id}', sp);
})
return t.batch(queries);
});
Better yet, this can be done with one query:
const ids = samplePayload.map(sp => sp.id);
return db.any('select * from sf_data where id in ($1)', [ids]);