Hello everybody. Wanted to ask about optional fields that are defined in input type of my app schema. Let’s say I’ve got this input type:

input UserUpdateInput {
  firstName: String
  lastName: String
  shippingAddress: AddressInput
  phone: String
}

And this mutation:

updateUser(where: UserWhereUniqueInput!, data: UserUpdateInput!): User!

If I run this mutation and provide only

firstName

and

phone

for example. I can see that in my resolver I have args object with 2 properties that I have provided (only

firstName

and

phone

). The question is that I’ve seen implementations that use

*setNull

fields, like:

input UserUpdateInput {
  firstName: String
  lastName: String
  shippingAddress: AddressInput
  shippingAddress_setNull: Boolean
  phone: String
  phone_setNull: Boolean
}

I’m told that the reason is that by default the fields that are optional and not provided are set to

null

but I don’t see that. And it’s used to distinguish if a user really wants to set the field as

null

or just hasn’t provided a value. But in my case I don’t see not provided values to be set

null

. Can you please help to understand what is the proper way to implement that? Thank you. P.S. API with Apollo Server.