ent-framework

import { Ent, EntContext, Field, UUID, PrimaryKey, UUIDField, StringField, BooleanField, EntCreationOptions, EntQueryContext } from 'ent-framework'; interface UserData { id: UUID; name: string; isActive: boolean; } class User extends Ent<UserData> { @Field(UUIDField()) id: UUID = PrimaryKey.empty(); @Field(StringField()) name: string = ''; @Field(BooleanField({ defaultValue: true })) isActive: boolean = true; static create(context: EntQueryContext, data: Partial<UserData>, options?: EntCreationOptions): User { return super.create(context, data, options) as User; } static load(context: EntQueryContext, id: UUID): Promise<User | null> { return super.load(context, id) as Promise<User | null>; } } async function runExample() { // In a real application, DATABASE_URL would point to your PostgreSQL instance. // For this example, we simulate a context setup. const entContext = new EntContext({ // Replace with actual database connection configuration // For demonstration, we'll use a placeholder URL. connectionUri: process.env.DATABASE_URL ?? 'postgresql://user:password@host:port/database', // Other configuration like sharding rules, logging, etc. logLevel: 'debug' }); try { await entContext.init(); console.log('EntContext initialized.'); // Assume schema migration/sync is handled externally or by framework setup const newUser = await User.create(entContext, { name: 'Alice', isActive: true }); console.log(`Created user: ${newUser.name} (ID: ${newUser.id})`); const loadedUser = await User.load(entContext, newUser.id); if (loadedUser) { console.log(`Loaded user: ${loadedUser.name}, Active: ${loadedUser.isActive}`); } else { console.log('User not found.'); } // Example of another operation (e.g., updating) if (loadedUser) { const updatedUser = await loadedUser.update(entContext, { isActive: false }); console.log(`Updated user: ${updatedUser.name}, Active: ${updatedUser.isActive}`); } } catch (error) { console.error('Error during example run:', error); } finally { await entContext.close(); console.log('EntContext closed.'); } } runExample();