What is NeDB?
NeDB is a javascript database. https://github.com/louischatriot/nedb
From their website:
Embedded persistent or in memory database for Node.js, nw.js, Electron and browsers, 100% JavaScript, no binary dependency.
Install
Using npm:
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npm install nedb --save
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Using yarn:
Usage
NeDB is a pretty similar MongoDB when it comes to the sintaxe.
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import Datastore from 'nedb'
const projects = new Datastore({
filename: 'projects.db',
autoload: true
})
const project = {
title: 'Some Project Title'
}
projects.insert(project, (err, doc) => {
if (err) console.warn(err)
console.log(doc)
// we should get something like
// { title: 'Some Project title', _id: 'fasd8fa0df9d9d98' }
})
projects.find({}, (err, docs) => {
if (err) console.warn(err)
console.log(docs)
// we should get something like
// [{ title: 'Some Project title', _id: 'fasd8fa0df9d9d98' }]
})
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Promises
NeDB does not support Promises or async/await, but we can still use Promises, like this:
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// create the connection
const projects = new Datastore({
filename: 'projects.db',
autoload: true
})
// create a method to wrap the insert
const createProject = (title) => {
const project = {
title
}
return new Promise((resolve, reject) => {
projects.insert(project, (err, doc) => {
err ? reject(err) : resolve(doc)
})
})
}
// create a method to wrap the fetch
const fetchProjects = () => {
return new Promise((resolve, reject) => {
projects.find({}, (err, docs) => {
err ? reject(err) : resolve(docs)
})
})
}
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And now to use our methods:
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// now we create a project like this
createProject('Some Project Title')
.then(project => {
console.log(project)
})
.catch(err => {
console.warn(err)
})
fetchProjects()
.then(projects => {
console.info(projects)
})
.catch(err => {
console.warn(err)
})
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How easy is that :)
