Conditional operations

FQL doesn’t have a ternary (conditional) operator. You can get the same result using an if … else statement. For example, to perform an upsert:

// Customer email to look up
let email = "alice.appleseed@example.com"

// Customer data to upsert
let data = {
  name: "Alice Appleseed",
  email: "alice.appleseed@example.com",
  address: {
    street: "87856 Mendota Court",
    city: "Washington",
    state: "DC",
    postalCode: "20220",
    country: "US"
  }
}

// Try to find the existing customer by email.
// If the customer doesn't exist, returns `null`.
let customer = Customer.byEmail(email).first()

// Create or update the customer based on existence.
// If customer is null, create a new customer.
// Otherwise, update the existing one.
if (customer == null) {
  Customer.create(data)
} else {
  customer!.update(data)
}

Null checking

If you’re checking for a null value, you can use the null coalescing (??) operator to return a default value when an expression is null. For example:

// Try to find the existing customer by email.
// If the customer doesn't exist, return `null`.
let customer = Customer.byEmail("carol.clark@example.com")?.first()


// Use the null coalescing (??) operator to return the customer's
// cart. If the customer or their cart is `null`, return `"Not found"`.
// In this case, the customer's cart is `null`.
customer?.cart ?? "Not found" // returns "Not found"