PostgreSQL multi-row updates in Node.js

Question

As i already found here On Stackoverflow it is possible to update multiple rows in one query by doing something like this

update test as t set
    column_a =         


        

Answer 1

First of all, I did accept the answer from @vitaly-t, as he taught me to use a better and faster library pg-promise and it did solve my problem. (period)

But to answer my own question for the people who could end up with the same problem and want to stay with the library pg, here is where i made the mistake (it's just syntax)

In my original code i had this line at the end

return {
    text: 'UPDATE fit_ratios as f set ratio_budget = c.ratio_budget from (VALUES ' +  chunks.join(', ') + ') as c(ratio_label, ratio_budget) WHERE c.ratio_label = f.ratio_label', values: params
        }
}

The first time i saw this it was hard to understand so it was very easy to make some mistakes. changing this line of code to what you see underneath fixed my original problem to

return {
    text: 'UPDATE fit_ratios as f set ratio_budget = c.value from (VALUES ' +  chunks.join(', ') + ') as c(id, value) WHERE c.id = f.ratio_id',
                values: params
}

I just missed by using column names instead of using the keys of my object. (e.g. c.ratio_label to c.id, ...)