Payload DangerouslyExpandRelations

helper.ts

type HasObject<T> = T extends object ? (T extends null ? false : true) : false

// Remove string from union if it contains both string and object types
type RemoveStringIfHasObject<T> = string extends T
  ? true extends HasObject<T>
    ? Exclude<T, string>
    : T
  : T

// Recursive helper that handles arrays / readonly arrays and objects
export type DangerouslyExpandRelations<T> =
  // readonly arrays / tuples (simplified): handle element type first
  T extends readonly (infer U)[]
    ? DangerouslyExpandRelations<RemoveStringIfHasObject<U>>[]
    : // normal arrays (redundant but explicit)
      T extends (infer U)[]
      ? DangerouslyExpandRelations<RemoveStringIfHasObject<U>>[]
      : // objects: map properties and recurse (also handles optional/nullable)
        T extends object
        ? {
            [K in keyof T]: DangerouslyExpandRelations<
              RemoveStringIfHasObject<T[K]>
            >
          }
        : // primitives / others
          T

https://www.typescriptlang.org/play/?#code/PTAEGEAsFMGMGtQEsBmoCGoAuBPADtKLAPYB2W6SpAzhqTqMQEYBWcWoAFNAB6wA2AVwAmVAOahSg-vwCUAKFwFQACXTUA8q3YAeACoA+UAF5Qe0LyzRSw2szawOAfi7nL125On9QLlOn5qQgAubAAnQWhZUFD-QOh5eRBQACVoAFtiADdCKXSmaDDQFDDidNBBUiQyZDQkDhJyShpQJmIsSC98wrphRm1HbHxoakVh1Izs6ABlLDDxAEkUNU0BrH0jU2o58QseKxtaPXlQX3DIvYPPFa0HdcMT07OAUT4hYWh9ABpQbfnSMQGR6nULHEFmRLJNKwQRhahIHKgGD8AhFDroDiQdA2fgjDBhMLoHC0MBhaDoYRkfgMdAEom0bF9ezsUa8PDEMIcJSEAAi2LEhWIgmo1NeeEZaX4GOqNA2JkeyTJFKpNLpxNAYCwgjwuNonHh6R1qCQ0GEslCWJxhGguPS1i54xQSDhWEebn2HloSsppGpXCoKB6AFVZABtAC6wLOfIBguFop44pskulZGoOjSmRys3+YiWNzWOiDBgMEajoWSpA56QC+MJ6s4ZOElWE2I4TEEHDZ-CQsHqCieT3dVz1AeDYcjg9OLhjAtK8ZwYolNtTsszUxzi2W6luumLpcnU4rYGZjmooRreFAeFKqKwJoZNlAZJhcMInAC1GISMZusYeHvMgAmAKQZHQJhcQHKdTmHT1+juKNBxcABvRDoNAUMAGlkFIUB4GgHBiDQPRw1CWc4xFRdE2XKVANlND0ImLMZh2AF8x3Qs9Cw8MgUYwdeL4gBfBiYg1MAbyQdJ6gRPETw6QpRj4iExmUIMgiKUxkOQYRQjyAowgAbkkdA7VCP5dmE7kzGsNsTFALSkB0rp9KM0gTOgMzWIkYSVMIPQRiwcB1EITT5AASEczzc3C9BO0gDkot2AAfUA1MKcKDjbJxEoBUAUv8tzyDyrwZHC9ltnPLhzNylK0rCCd5B8qy0moaQOFMcj50opdkxXOj0387YgqCIEgA