2 replies

How to make function that takes in a table as parameter with correct types?

e.g. if we have the following function, which takes in an arbitrary table and executes a where clause on it:

 typescript
import db from '../db'
import { type Table, type SQL, } from 'drizzle-orm'

function queryTable<T extends Table>(table: T, whereClause?: SQL<unknown>) {
    let query = db.select().from(table)
    if (whereClause) {
        query = query.where(whereClause)
    }
    return query
}

 typescript
import db from '../db'
import { type Table, type SQL, } from 'drizzle-orm'

function queryTable<T extends Table>(table: T, whereClause?: SQL<unknown>) {
    let query = db.select().from(table)
    if (whereClause) {
        query = query.where(whereClause)
    }
    return query
}

I get the following error ("drizzle-orm": "0.39.1"):
Argument of type 'T' is not assignable to parameter of type 'TableLikeHasEmptySelection<T> extends true ? DrizzleTypeError<"Cannot reference a data-modifying statement subquery if it doesn't contain a

returning

returning

clause"> : T'.
Type 'Table<TableConfig<Column<any, object, object>>>' is not assignable to type 'TableLikeHasEmptySelection<T> extends true ? DrizzleTypeError<"Cannot reference a data-modifying statement subquery if it doesn't contain a

returning

returning

clause"> : T'

Drizzle Team•12mo ago•

2 replies

iamgengar.

How to make function that takes in a table as parameter with correct types?

e.g. if we have the following function, which takes in an arbitrary table and executes a where clause on it:

 typescript
import db from '../db'
import { type Table, type SQL, } from 'drizzle-orm'

function queryTable<T extends Table>(table: T, whereClause?: SQL<unknown>) {
    let query = db.select().from(table)
    if (whereClause) {
        query = query.where(whereClause)
    }
    return query
}

 typescript
import db from '../db'
import { type Table, type SQL, } from 'drizzle-orm'

function queryTable<T extends Table>(table: T, whereClause?: SQL<unknown>) {
    let query = db.select().from(table)
    if (whereClause) {
        query = query.where(whereClause)
    }
    return query
}

returning

returning

returning

returning

clause"> : T'

How to make function that takes in a table as parameter with correct types?

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