Expo SQLite ORM

It is a simple ORM utility to use with expo sqlite

Warn: it works only on iOS and Android. Web is not supported (SEE)

Install

yarn add expo-sqlite-orm

Basic usage

You need to provide 3 things:

• databaseName: Name of the database to be created/used by expo SQLite
• tableName: The name of the table
• columnMapping: The columns for the model and their types
  • Supported options: type, primary_key, autoincrement, not_null, unique, default

import { Text } from '@components'
import { ColumnMapping, columnTypes, IStatement, Migrations, Repository, sql } from 'expo-sqlite-orm'
import React, { useMemo, useState } from 'react'
import { ScrollView } from 'react-native'

import { RootTabScreenProps } from '../../navigation/types'

/**
 * Expo Sqlite ORM V2 - Usage example
 */

interface Animal {
  id: number
  name: string
  color: string
  age: number
  another_uid?: number
  timestamp?: number
}

const columMapping: ColumnMapping<Animal> = {
  id: { type: columnTypes.INTEGER },
  name: { type: columnTypes.TEXT },
  color: { type: columnTypes.TEXT },
  age: { type: columnTypes.NUMERIC },
  another_uid: { type: columnTypes.INTEGER },
  timestamp: { type: columnTypes.INTEGER, default: () => Date.now() },
}

const statements: IStatement = {
  '1662689376195_create_animals': sql`
        CREATE TABLE animals (
          id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
          name TEXT NOT NULL,
          color TEXT,
          age NUMERIC,
          another_uid TEXT UNIQUE,
          timestamp INTEGER
        );`,
}

const databaseName = 'dbName'

export function MeusServicosScreen({ navigation }: RootTabScreenProps<'MeusServicos'>) {
  const [animals, setAnimals] = useState<Animal[]>([])
  const migrations = useMemo(() => new Migrations(databaseName, statements), [])

  const animalRepository = useMemo(() => {
    return new Repository(databaseName, 'animals', columMapping)
  }, [])

  const onPressRunMigrations = async () => {
    await migrations.migrate()
  }

  const onPressReset = async () => {
    await migrations.reset()
    setAnimals([])
  }

  const onPressInsert = () => {
    animalRepository.insert({ name: 'Bob', color: 'Brown', age: 2 }).then((createdAnimal) => {
      console.log(createdAnimal)
    })
  }

  const onPressQuery = () => {
    animalRepository.query({ where: { age: { gte: 1 } } }).then((foundAnimals) => {
      console.log(foundAnimals)
      setAnimals(foundAnimals)
    })
  }

  return (
    <ScrollView>
      <Text type="text2" onPress={onPressRunMigrations}>
        Migrate
      </Text>
      <Text type="text2" onPress={onPressReset}>
        Reset Database
      </Text>
      <Text type="text2" onPress={onPressInsert}>
        Insert Animal
      </Text>
      <Text type="text2" onPress={onPressQuery}>
        List Animals
      </Text>
      <Text type="text2">{JSON.stringify(animals, null, 1)}</Text>
    </ScrollView>
  )
}

Database operations

Insert a record

const props: Animal = {
  name: 'Bob',
  color: 'Brown',
  age: 2
}

animalRepository.insert(props)

Find a record

const id = 1
animalRepository.find(id)

or

animalRepository.findBy({ age: { equals: 12345 }, color: { contains: '%Brown%' } })

Update a record

const props = {
  id: 1 // required
  age: 3
}

animalRepository.update(props)

Destroy a record

const id = 1
animalRepository.destroy(id)

Destroy all records

animalRepository.destroyAll()

Query

const options = {
  columns: 'id, name',
  where: {
    id: { in: [1, 2, 3, 4] },
    age: { gt: 2, lt: 10 }
  },
  page: 2,
  limit: 30,
  order: { name: 'ASC' }
}

animalRepository.query(options)

The property page is applied only if you pass the limit as well

Where operations

• equals: =,
• notEquals: <>,
• lt: <,
• lte: <=,
• gt: >,
• gte: >=,
• contains: LIKE
• in: IN (?)
• notIn: NOT IN (?)

Data types

• INTEGER
• FLOAT
• TEXT
• NUMERIC
• DATE
• DATETIME
• BOOLEAN
• JSON

How to exec a sql manually?

myCustomMethod() {
  const sql = 'SELECT * FROM table_name WHERE status = ?'
  const params = ['active']
  return animalRepository.databaseLayer.executeSql(sql, params).then(({ rows }) => rows)
}

Bulk insert or replace?

const itens = [{id: 1, color: 'green'}, {id: 2, color: 'red'}]
animalRepository.databaseLayer.bulkInsertOrReplace(itens).then(response => {
  console.log(response)
})

Migrations

Execute the migrations

import * as SQLite from 'expo-sqlite'
import { Migrations, sql } from 'expo-sqlite-orm'

const statements: IStatement = {
  '1662689376195_init': sql`CREATE TABLE animals (id TEXT, name TEXT);`,
  '1662689376196_add_age_column': sql`ALTER TABLE animals ADD age NUMERIC;`,
  '1662689376197_add_color_column': sql`ALTER TABLE animals ADD color TEXT;`
}

const migrations = new Migrations('databaseName', statements)
await migrations.migrate()

Reset the database

const migrations = new Migrations('databaseName', statements)
await migrations.reset()

TODO

• Add basic typescript support
• Make it easier to use with react-hooks
• Complete typescript autocomplete for where queries
• Add migrations feature
• Create a singleton to handle the instances easily
• Allow IN statement
• Allow OR statement

Changelog

• 1.5.0 - Return unlimited rows if page is not specified in the query params
• 1.6.0 - Make autoincrement property to be optional
• 2.0.0 - BREAKING CHANGE
  • Add typescript support
  • Remove BaseModel in favor of Repository (Easier to use with react-hooks)
  • Add migrations support

Development

docker-compose run --rm bump         # patch
docker-compose run --rm bump --minor # minor

git push
git push --tags

Test

docker-compose run --rm app install
docker-compose run --rm app test

Working examples

• https://github.com/dflourusso/expo-sqlite-orm-example
• https://snack.expo.io/@dflourusso/expo-sqlite-orm-example

Author

• Daniel Fernando Lourusso

License

This project is licensed under MIT License