Prisma•14mo ago•

9 replies

type-safely wrapping `findMany`

I am trying to wrap the

findMany

findMany

function in a separate function.

Can someone help me to get this right:

async function query<A, T = typeof prisma.assignment>(
    args: Prisma.Exact<A, Prisma.Args<T, 'findMany'>>
): Promise<Prisma.Result<T, A, 'findMany'>> {
    return prisma.assignment.findMany(args)
}

const params = {
    select: { id: true },
    foo: "bar"
}
const __ = await query(params)

async function query<A, T = typeof prisma.assignment>(
    args: Prisma.Exact<A, Prisma.Args<T, 'findMany'>>
): Promise<Prisma.Result<T, A, 'findMany'>> {
    return prisma.assignment.findMany(args)
}

const params = {
    select: { id: true },
    foo: "bar"
}
const __ = await query(params)

So my trail of thought was to make it similar to a client extension (which is not what I want. I would like the function presented to be correctly typed) yet I do not have the

this

this

property to work with. So I ended using

Prisma.Args

Prisma.Args

to describe the shape of input args that I want and

Prisma.Exact

Prisma.Exact

to narrow

down to

Prisma.Args<T, 'findMany'>

Prisma.Args<T, 'findMany'>

. This leads to

args

args

being rejected as valid for

prisma.assignment.findMany

prisma.assignment.findMany

So I get this error if I use

Prisma.Exact

Prisma.Exact

for

args

args

Argument of type 'string | number | bigint | boolean | [] | { [K in keyof A]: Exact<A[K], any>; }' is not assignable to parameter of type '{ select?: Exact<AssignmentSelect<InternalArgs &  .... (more types follow)

Argument of type 'string | number | bigint | boolean | [] | { [K in keyof A]: Exact<A[K], any>; }' is not assignable to parameter of type '{ select?: Exact<AssignmentSelect<InternalArgs &  .... (more types follow)

As a 2nd problem, I can't get the return type right. the

return prisma.assignment...

return prisma.assignment...

statement has red squiqqly lines with TS complaining:

Type '{ id: string; created: Date; .... } is not assignable to type 'Result<T, A, "findMany">'

Type '{ id: string; created: Date; .... } is not assignable to type 'Result<T, A, "findMany">'

So apparently I get everything wrong and I can't figure out how this should work. Does anyone know how to make it so that my personal wrapper exactly type-safely mirrors the type/shape/behavior of

prisma.assignment.findMany

prisma.assignment.findMany

Prisma•14mo ago•

9 replies

ptrxyz

type-safely wrapping `findMany`

I am trying to wrap the

findMany

findMany

function in a separate function.

Can someone help me to get this right:

async function query<A, T = typeof prisma.assignment>(
    args: Prisma.Exact<A, Prisma.Args<T, 'findMany'>>
): Promise<Prisma.Result<T, A, 'findMany'>> {
    return prisma.assignment.findMany(args)
}

const params = {
    select: { id: true },
    foo: "bar"
}
const __ = await query(params)

async function query<A, T = typeof prisma.assignment>(
    args: Prisma.Exact<A, Prisma.Args<T, 'findMany'>>
): Promise<Prisma.Result<T, A, 'findMany'>> {
    return prisma.assignment.findMany(args)
}

const params = {
    select: { id: true },
    foo: "bar"
}
const __ = await query(params)

So my trail of thought was to make it similar to a client extension (which is not what I want. I would like the function presented to be correctly typed) yet I do not have the

this

this

property to work with. So I ended using

Prisma.Args

Prisma.Args

to describe the shape of input args that I want and

Prisma.Exact

Prisma.Exact

to narrow

down to

Prisma.Args<T, 'findMany'>

Prisma.Args<T, 'findMany'>

. This leads to

args

args

being rejected as valid for

prisma.assignment.findMany

prisma.assignment.findMany

So I get this error if I use

Prisma.Exact

Prisma.Exact

for

args

args

Argument of type 'string | number | bigint | boolean | [] | { [K in keyof A]: Exact<A[K], any>; }' is not assignable to parameter of type '{ select?: Exact<AssignmentSelect<InternalArgs &  .... (more types follow)

Argument of type 'string | number | bigint | boolean | [] | { [K in keyof A]: Exact<A[K], any>; }' is not assignable to parameter of type '{ select?: Exact<AssignmentSelect<InternalArgs &  .... (more types follow)

As a 2nd problem, I can't get the return type right. the

return prisma.assignment...

return prisma.assignment...

statement has red squiqqly lines with TS complaining:

Type '{ id: string; created: Date; .... } is not assignable to type 'Result<T, A, "findMany">'

Type '{ id: string; created: Date; .... } is not assignable to type 'Result<T, A, "findMany">'

So apparently I get everything wrong and I can't figure out how this should work. Does anyone know how to make it so that my personal wrapper exactly type-safely mirrors the type/shape/behavior of

prisma.assignment.findMany

prisma.assignment.findMany

type-safely wrapping `findMany`

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