Supabase ActiveRecord

ActiveRecord implementation for Supabase (experimental).

Features

• CRUD
• Validations
• Relationships belongsTo(), hasMany()
• Named scopes
• Filtering
• Joining
• Isomorphic

Examples

Models

A model is a class that inherits from ActiveRecord:

import { ActiveRecord } from 'supabase-active-record'

class Person extends ActiveRecord {
  // define table name and fields
  static config = {
    table: 'people',
    fields: {
      id: 'serial',
      firstName: 'string',
      lastName: 'string'
    }
  }
}

Querying

To get all records:

const people = await Person.all()

To find a single record:

const person = await Person.findBy({firstName: "Josh", lastName: "Nussbaum"})

To find by id:

const person = await Person.find(41)

ActiveRecord.find() and ActiveRecord.findBy() return null when no record is found. If you perfer to raise an NotFoundError, use ActiveRecord.get() or ActiveRecord.getBy():

try {
  const person = await Person.get(41)
} catch (error) {
  console.error(error.name) // RecordNotFound
}

Filters

Filters can be added by chaining .where() calls together:

// single filter
await Person.where({lastName: 'Jobs'})

// multiple filters
await Person
  .where({firstName: 'Steve', lastName: 'Jobs'})

// equivalent
await Person
  .where('firstName', 'Steve')
  .where('lastName', 'Jobs')

// equivalent, using operators
await Person
  .where('firstName', '=', 'Steve')
  .where('lastName', '=', 'Jobs')

// supported operators: =, !=, >, <, <=, >=, like, ilike
await Product
  .where('price', '>', 100)
  .where('name', 'like', '*shirt*')

Ordering

Data can be ordered by one or more columns:

// sort by column
await Product
  .all()
  .order('name')

// sort by multiple columns
await Product
  .all()
  .order(['price', 'name'])

// ascending and descending can be specified as `asc` and `desc`
await Product
  .all()
  .order({price: 'desc', name: 'asc'})

Limiting

To limit the number of records returned:

await Product
  .all()
  .limit(10) // 10 records max

Joining

(not yet working)

Multiple models can be joined together

import { ActiveRecord, belongsTo } from 'supabase-active-record'

class Product extends ActiveRecord {
  static config = [
    table: 'products',
    fields: {
      id: 'serial',
      name: 'string',
      category: belongsTo(Category)
    }
  ]
}

const product = await Product
  .find(1)
  .join('category')

console.log(product.category) // Category { name: 'T-Shirts' }

Scopes

Named scopes can be defined using static functions:

class Product extends ActiveRecord {
  static config = {
    table: 'products'
  }

  static expensive() {
    return this
      .where('price', '>', 100)
      .order({price: 'desc'})
      .limit(3)
  }
}

And then call the scope like this:

const products = await Product.expensive()

Validation

Multiple validations are supported. They are defined in config.validate:

import { ActiveRecord, is } from 'supabase-active-record'

class Product extends ActiveRecord {
  static config = {
    table: 'products',
    fields: {
      name: 'string',
      price: 'number'
    },
    validates: {
      name: is.required()
      price: is.type('number')
    }
  }
}

Supported validations: is.required(), is.type(), is.length(), is.format()

Custom validation

A validation is a function that takes an object (the record) and returns a string (the error message).

import { ActiveRecord, is } from 'supabase-active-record'

class Product extends ActiveRecord {
  static config = {
    // ...
    validates: {
      name: record => {
        if (record.name.length < 3)
          return 'is too short'
      }
    }
  }
}

Creating

To create a single record:

const {valid, errors, record} = await Product.create({name: 'Shirt'})

or using an instance:

const product = new Product()

product.name = 'Shirt'
product.price = 100

const { valid, errors } = await product.save()

To create multiple records at once:

await Product.create([
  {name: 'Shirt', price: 20},
  {name: 'Pants', price: 100}
])

Updating

To update a record, call record.save():

// get existing record
const product = await Product.find(1)

// change record
product.price++

// save record
const {valid, errors} = await product.save()

or update multiple records at once:

// update all records where price=1 to price=2
await Product
  .where('price', '=', 1)
  .update({price: 2})

Deleting

To delete a record:

// get existing record
const product = await Product.find(1)

// delete it
await product.delete()

or delete multiple records at once:

// delete all records where price > 1000
await Product
  .where('price', '>', 1000)
  .delete()

Instance methods

Instance methods, getters and setters can be added to the model:

class Person extends ActiveRecord {
  // define a getter
  get fullName() {
    return `${this.firstName} ${this.lastName}`
  }

  // define a setter
  set fullName(value) {
    const [firstName, lastName] = value.split(' ')

    this.firstName = firstName
    this.lastName = lastName
  }

  // define a method to update name
  anonymize() {
    this.firstName = 'Anonymous'
    this.lastName = 'Anonymous'
  }
}

const person = new Person({firstName: "Steve", lastName: "Jobs"})
console.log(person.fullName) // Steve Jobs
person.anonymize()
console.log(person.fullName) // Anonymous Anonymous

Change Tracking

When a record is changed, record.isChanged is set to true. There is also record.isPersisted which is the opposite of record.isChanged.

const product = new Product()

console.log(product.isNewRecord) // true
console.log(product.isChanged) // true
console.log(product.isPersisted) // false (opposite of isChanged)

await product.save()

// now it's no longer a new record or dirty
console.log(product.isNewRecord) // false
console.log(product.isChanged) // false
console.log(product.isPersisted) // true

Setup

Install the npm package:

yarn add supabase-active-record

Setup the supabase client:

import { createClient } from '@supabase/supabase-js'
import { ActiveRecord } from 'supabase-active-record'

ActiveRecord.client = createClient("<your supabase url>", "<your supabase key>")