Function DataClass

DataClass(options?: DataClassOptions): ClassDecorator
Class decorator that marks an entity class for use with Database.

@DataClass must be applied after @KeyPath (or @CompositeKeyPath) and performs the following at decoration time:
1. Verifies that exactly one @KeyPath (or @CompositeKeyPath) annotation is present on the class.
2. Records the schema version in reflect-metadata.
3. Marks the class as a valid data class (guards against passing plain classes to Database.build).
Parameters
- options: DataClassOptions = {}
  Optional schema version configuration.
Returns ClassDecorator
Throws
Error - If no @KeyPath / @CompositeKeyPath annotation is found.

Throws
Error - If more than one property-level @KeyPath annotation is present (use @CompositeKeyPath for multi-field keys instead).
Example
```
@DataClass({ version: 2 })
class User {
  @KeyPath({ generator: 'uuid' })
  id!: string;

  @Index({ unique: true })
  email!: string;

  name!: string;
}
```
- Defined in index.ts:1628