how to return an empty array instead of null

I have such a type:

type P {
  id String
  m  Int[]
}

type P {
  id String
  m  Int[]
}

In the database, some items doesn't have field

at all. When I query such items,

is set to

null

null

. How to return an empty array instead? It feel weird that Prisma disallows optional lists, so typescript type will be like that:

{id: string, m: number: []}

{id: string, m: number: []}

but I still have to check that the field

exists before accessing it