how can I attach a variable to a mutation conditionally?
I want to create an upsert mutation where the id is generated by the database.
So, if the $id variable was set, make an update, otherwise, a creation.
I have tried something like this:
mutation upsert (
$id: uuid
$name: String
) {
insert_data_one(
object: {
id: $id
name: $name
}
on_conflict: {
constraint: data_pkey
update_columns: [name ]
}
) {
id
name
}
}
But the error I receive is a malformed id
{
"errors": [
{
"extensions": {
"path": "$.selectionSet.insert_data_one.args.object.id",
"code": "validation-failed"
},
"message": "unexpected null value for type \"uuid\""
}
]
}
As an alternative to using named variables for each field, you can accept the whole record as a variable. This way, if a field is not required in this mutation (for example if it is nullable) you can safely leave it out.
It might look something like this:
mutation MyMutation($object: data_insert_input!) {
insert_data_one(object: $object) {
id
name
}
}
Then your variables might look something like this:
{
"object": {
"id": "<some id>",
"name": "<some name>"
}
}