A lightweight, powerful, and TypeORM-aligned Object-Relational Mapper (ORM) for React Native applications. Built for SQLite, optimized for developer experience.

Designed to work seamlessly with expo-sqlite (both classic and "next") and react-native-sqlite-storage.

Features ✨

• TypeORM Alignment: Familiar API (find, findOne, save, softDelete, create, merge, etc.).
• Strict Typing: No more magic strings. Queries are strictly typed to your entities.
• Active Record & Data Mapper: Work directly with entities (User.find()) or via repositories.
• CLI Tools: Built-in CLI for entity generation, migrations, and schema diagrams.
• Soft Deletes: @DeleteDateColumn() support for automatic soft deletion and recovery.
• Relations: Easy-to-use decorators for OneToOne, OneToMany, ManyToOne, ManyToMany.
• Cross-Platform: Works with Expo and generic React Native projects.
• Lifecycle Hooks: BeforeInsert, AfterLoad, etc.
• Transactions: Full ACID compliance.

---

Installation 📦

1. Install core package:

   npm install nativeql reflect-metadata

2. Install a Driver:

   Generic React Native:

   npm install react-native-sqlite-storage

   Expo:

   npx expo install expo-sqlite

3. Configure TypeScript (tsconfig.json):

   {
     "compilerOptions": {
       "experimentalDecorators": true,
       "emitDecoratorMetadata": true
     }
   }

4. Import Reflection: Add this to the very top of App.tsx:

   import "reflect-metadata";

5. Configure Babel (babel.config.js):

   Install necessary plugins:

   npm install --save-dev babel-plugin-transform-typescript-metadata @babel/plugin-proposal-decorators @babel/plugin-proposal-class-properties

   Update babel.config.js:

   module.exports = function (api) {
     api.cache(true);
     return {
       presets: ["babel-preset-expo"], // or 'module:metro-react-native-babel-preset'
       plugins: [
         "babel-plugin-transform-typescript-metadata",
         ["@babel/plugin-proposal-decorators", { legacy: true }],
         ["@babel/plugin-proposal-class-properties", { loose: true }],
       ],
     };
   };

---

Quick Start 🏁

1. Create an Entity

import {
  Entity,
  PrimaryGeneratedColumn,
  Column,
  BaseEntity,
  CreateDateColumn,
  UpdateDateColumn,
  DeleteDateColumn,
  ColumnType,
} from "nativeql";

@Entity("users")
export class User extends BaseEntity {
  @PrimaryGeneratedColumn()
  declare id: number;

  @Column({ type: ColumnType.String })
  declare name: string;

  @Column({ type: "text", nullable: true })
  declare email?: string;

  @Column({ type: "boolean", default: true })
  declare isActive: boolean;

  // Automatic soft-delete support
  @DeleteDateColumn()
  declare deletedAt?: Date;

  @CreateDateColumn()
  declare createdAt: Date;

  @UpdateDateColumn()
  declare updatedAt: Date;
}

2. Initialize DataSource

import { DataSource, ExpoSqliteDriver } from "nativeql";
import * as SQLite from "expo-sqlite";

// For Expo SDK 50+ (Next API)
const db = SQLite.openDatabaseSync("mydb.db");

export const AppDataSource = new DataSource({
  driver: new ExpoSqliteDriver(db),
  entities: [User],
  synchronize: true, // Auto-create tables (Dev only)
});

// Initialize on App Start
await AppDataSource.initialize();

---

Data Operations 🛠️

NativeQL enforces strict typing. Queries must use object syntax.

Create & Insert

// 1. Create instance (Active Record)
const user = new User();
user.name = "Alice";
await user.save();

// 2. Static Create (No DB call yet)
const newUser = User.create({ name: "Bob", email: "bob@test.com" });
await newUser.save();

// 3. Fast Insert (No cascades/selects)
await User.insert({ name: "Charlie", isActive: false });

Read

// Find One (Strict WHERE clause required)
const user = await User.findOne({
  where: { id: 1 },
  relations: ["posts"],
});

// Find Many
const activeUsers = await User.find({
  where: { isActive: true },
  order: { name: "ASC" },
  take: 10,
});

// Find and Count
const [users, count] = await User.findAndCount({ skip: 0, take: 5 });

Update

// Partial Update (by ID)
await User.update(1, { name: "New Name" });

// Bulk Update (by Criteria)
await User.update({ isActive: false }, { isActive: true });

Delete & Soft Delete

// Soft Delete (requires @DeleteDateColumn)
await User.softDelete(1);
// Row remains in DB with deletedAt set.
// User.find() will implicitly filter these out.

// Restore
await User.restore(1);

// Hard Delete (Permanent)
await User.delete(1);

Utility Methods

// Counters
await Post.increment({ id: 1 }, "views", 1);
await Product.decrement({ id: 5 }, "stock", 1);

// Check & Reload
if (user.hasId()) {
  await user.reload(); // Re-fetch from DB
}

// Truncate Table
await User.clear();

---

CLI Tools 🖥️

NativeQL comes with a powerful CLI.

# Initialize CLI configuration
npx nativeql init

# Generate a new Entity
npx nativeql generate entity User

# Validate Schema (Check for common errors)
npx nativeql validate

# Visualize Schema (Mermaid Diagram)
npx nativeql diagram

---

Relationships 🔗

Support for standard relationship types with eager loading and cascades.

@Entity("posts")
export class Post extends BaseEntity {
  @PrimaryGeneratedColumn()
  id!: number;

  @ManyToOne(() => User, (user) => user.posts)
  user!: User;

  @ManyToMany(() => Category)
  @JoinTable()
  categories!: Category[];
}

---

Advanced Querying 🔍

Use operators for complex filters:

import { In, Like, LessThan, MoreThan } from "nativeql";

const results = await Product.find({
  where: {
    price: LessThan(50),
    category: In(["Electronics", "Books"]),
    name: Like("%Pro%"),
  },
});

---

License

MIT