EtienneK / sqlite-document-db

UNDER CONSTRUCTION

SQLite Document DB

Use SQLite as a JSON Document Database.

API based on MongoDB's JavaScript API.

Getting started

1. Install using NPM:

npm i --save sqlite-document-db

2. Start using it:

import Db from 'sqlite-document-db'

const db = await Db.fromUrl(':memory:') // Can also be a path to your DB file

// Insert some users into a collection
await db.collection('users').insertOne({ username: 'test_user', email: '[e-mail]' })
await db.collection('users').insertMany([
  { username: 'test_user2', email: '[e-mail]' },
  { username: 'test_user3', email: '[e-mail]' },
])

const user = await db.collection('users').findOne({ email: '[e-mail]' })

console.log(user)

Console output of the above:

{
  _id: '626964400e547e782d04d7f1',
  username: 'test_user2',
  email: '[e-mail]'
}

Features and examples

Insert documents

// Insert a single document
db.collection('inventory').insertOne({ item: 'canvas', qty: 100, tags: ['cotton'], size: { h: 28, w: 35.5, uom: 'cm' } })

// Insert multiple documents
db.collection('inventory').insertOne([
  { _id: undefined, item: 'journal', qty: 25, tags: ['blank', 'red'], size: { h: 14, w: 21, uom: 'cm' } },
  { item: 'mat', qty: 85, tags: ['gray'], size: { h: 27.9, w: 35.5, uom: 'cm' } },
  { item: 'mousepad', qty: 25, tags: ['gel', 'blue'], size: { h: 19, w: 22.85, uom: 'cm' } }
])

Query documents

const items = [
  { item: 'journal', qty: 25, size: { h: 14, w: 21, uom: 'cm' }, status: 'A' },
  { item: 'notebook', qty: 50, size: { h: 8.5, w: 11, uom: 'in' }, status: 'A' },
  { item: 'paper', qty: 100, size: { h: 8.5, w: 11, uom: 'in' }, status: 'D' },
  { item: 'postcard', qty: 45, size: { h: 10, w: 15.25, uom: 'cm' }, status: 'C' },
  { item: 'planner', qty: 75, size: { h: 22.85, w: 30, uom: 'cm' }, status: 'D' },
  { item: 'postcard', qty: 45, size: { h: 10, w: 15.25, uom: 'cm' }, status: 'A' }
]

await db.collection('items').insertMany(items)

// Select a single document
db.collection('items').findOne({ item: 'paper' })

// Select all documents in a collection
const allItemsArray = await db.collection('items').find().toArray()

// Query using equality conditions
db.collection('items').find({ status: 'D' })
db.collection('items').find({ status: { $in: ['A', 'D'] } })
db.collection('items').find({ qty: { $lt: 30 } })
db.collection('items').find({ qty: { $gt: 30 } })
db.collection('items').find({ qty: { $lte: 45 } })
db.collection('items').find({ qty: { $gte: 45 } })
db.collection('items').find({ qty: { $eq: 45 } })
db.collection('items').find({ qty: { $ne: 45 } })
db.collection('items').find({ status: 'A', qty: { $lt: 30 } })
db.collection('items').find({ $or: [{ status: 'A' }, { qty: { $lt: 30 } }] })

Missing Features

Many MongoDB features are missing - either because I have not gotten time to implement them (feel free to help out!) or SQLite can't support them.

Need me to me more specific on missing features? Can't list them all, but from the top of my head:

Querying documents

• Query an Array for an Element
• Query an Array with Compound Filter Conditions on the Array Elements
• Query for an Array Element that Meets Multiple Criteria using $elemMatch
• Query an Array of Embedded Documents
• Project Fields to Return from Query
• Type check using $type
• Evaluation Query Operators

Updating documents

• updateOne() and updateMany()

Thanks

Thanks to https://github.com/thomas4019/mongo-query-to-postgres-jsonb for being a huge inspiration for this project.