TC39 Decorators Example

Source: examples/basic-app-decorators

This is the recommended approach for new TypeScript projects. It uses TC39 standard decorators (stage 3) with no special tsconfig flags needed.

What it demonstrates

• Model definition with @Node, @PrimaryKey, @Property, @Relationship
• TypeBox validation (Type.String(), Type.Number(), Type.Optional())
• Type inference with Related<typeof OtherNode>
• Model registration with neogma.model()
• CRUD operations (create, find, update, delete)
• Eager loading of relationships
• QueryBuilder with all clause types
• Sessions and transactions (including rollback)
• Error handling

Model definition

import {
  Node,
  PrimaryKey,
  Property,
  Relationship,
  NodeEntity,
  Type,
} from 'neogma';
import type { Related } from 'neogma';

@Node({ label: 'User' })
class UserNode extends NodeEntity {
  @PrimaryKey(Type.String()) id!: string;
  @Property(Type.String({ minLength: 1 })) name!: string;
  @Property(Type.Optional(Type.Number({ minimum: 0 }))) age?: number;

  @Relationship({ name: 'HAS_ORDER', direction: 'out', model: () => OrderNode })
  Orders!: Related<typeof OrderNode>;
}

Running

cd examples/basic-app-decorators
pnpm install
pnpm start