lawson

Database agnostic ODM

Install

$ npm install --save lawson nosqwal-memory

Setup

orm.js

import nosqwal from 'nosqwal-memory';
import lawson from 'lawson';

const noSqwalInstance = noSqwal();

export const collection = lawson(noSqwalInstance).defineCollection;

models/user.js

import {collection} from '../orm';

export default collection('user', {
    username: 'string',
    email: 'string',
    password: 'string'
});

Usage

import user from './models/user';

/*   create   */
user.create({
    username: 'test',
    email: '[email protected]',
    password: 'secret'
})
/*   get   */
.then(createdUser => {
    return user.get(createdUser.id);
})
/*   update   */
.then(newUser => {
    newUser.username = 'bobby';

    return user.update(newUser.id, newUser);
})
.then(updatedUser => {
    console.log('user updated');
})
.then(() => {
    return user.query({
        where: {
            username: 'bobby'
        }
    });
})
.then(users => {
    console.log(user.length);
    // => 1

    return user.delete(users[0].id);
})
.catch(e => {
    console.warn(e);
});

API

lawsonInstance = lawson(noSqwalInstance)

Create a new instance of lawson

noSqwalInstance

Type: Nosqwal instance
required

collection = lawsonInstance.defineCollection(collectionName, modelDefinition)

Define a new collection

collectionName

Type: string
required

the name of the collection

modelDefinition

Type: object required

The schema of the document, see its definition here

collection.get(documentId)

Returns a Promise, that resolve to the requested document

documentId

Type: string
required

collection.update(document)

Returns a Promise, that resolve when the document is updated

document

Type: object required

the new version of the document that will be updated

document.id

Type: string required

the id of the document to update

collection.create(document)

Returns a Promise, that resolve to the created document

document

Type: object required

The document that will be created

collection.delete(documentId)

Returns a Promise when the document is deleted

documentId

Type: string required

The id of the document that will be deleted

collection.query(options)

Returns a Promise, that resolve to all the documents

options.where

Type: object

Used to filter out results of the query

options.limit

Type: number

The number of documents to return

options.offset

Type: number
default: 0

The number of documents to skip

collection.first(where)

Like query(), but return a promise for only one document

where

Type: object

Used to filter out results of the query

collection.single(where)

Like first(), but throws an error if there is more that one document that matches the where clause

where

Type: object

Used to filter out results of the query

License

MIT © Thomas Sileghem