One to one connections

I’m getting the following error when I attempt to compile my schema:

InvalidDirectiveError: Connection is to a single object but the keyName <key-name> was provided which does not reference the default table.

Is it possible to define a one-to-one relationship with a keyName argument?

Which Category is your question related to? GraphQL compile

Amplify CLI Version 4.17.2

[edwardfoyle]

Hi @kldeb yes you are correct, you’ll need to store the referralId with the customer. Unfortunately there’s no great workaround to #3275 at this time. You might be able to get the behavior you want by putting a placeholder value for referralId in the customer record if there is no referralId for the customer:

type Customer @model {
	id: ID!
	referredBy: Referral @connection(fields: ["referralId"])
	referralId: ID!
	name: String!
}

type Referral @model {
	id: ID!
	name: String!
}

When creating a customer without a referral, you can put a placeholder value in the referralId which means that the referredBy field is going to come back null in queries.

I’m going to close this issue and you can track the progress of optional connections in #3275

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