Function CompositeKeyPath

CompositeKeyPath(fields: string[], options?: KeyPathOptions): ClassDecorator
Class decorator that defines a composite primary key spanning multiple fields. Use this when the entity's identity is determined by a combination of fields rather than a single property.
Parameters
- fields: string[]
  An ordered array of field names that together form the key.
- Optionaloptions: KeyPathOptions
  Optional key generation configuration (note: auto-generated keys are not supported for composite keys).
Returns ClassDecorator
Remarks
Apply @CompositeKeyPath before @DataClass (decorators execute bottom-up). @KeyPath must not also be used on the same class.
Example
```
@CompositeKeyPath(['userId', 'projectId'])
@DataClass()
class UserProject {
  userId!: string;
  projectId!: string;
  role!: string;
}

// Read by composite key:
const rel = await db.UserProject.read(['user1', 'proj42']);
```
- Defined in index.ts:1446