file-db
v0.0.2
Published
Document database that uses directories and files to store its data, supporting nested key-value objects in named collections
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File DB
File DB is a (very limited) document database that uses directories and files to store its data, supporting nested key-value objects in named collections.
Note: It does not support storage of arrays. Give it objects with keys and values.
Usage
The following code assumes you have installed file-db
via npm and have this at the top of your file:
var fdb = require('file-db');
fdb
The main file-db
lets you open a database.
Open a database
To open a connection to the database, use open
, passing a path and a callback. The callback receives an error parameter and a connection object.
fdb.open('tmp/example', function (err, db) {
// . . .
// Do your database stuff
// . . .
});
Connection
Connection objects allow you to choose a collection to query.
Query a collection
The use
method chooses a collection and returns a query object that you can use to query that collection.
var query = db.use('users');
Query
Query objects are tied to a specific collection, allowing you to choose how to query it.
Running a query
Whatever the query object, you can run it using the exec
method:
query.exec(function (err, documents) {
// Use the documents
});
Find all documents in a collection
The find
method sets up the query to retrieve all documents from a collection.
query.find()
.exec(doSomethingWithIt);
Find a document by _id
The find
method sets up the query to retrieve all documents from a collection.
query.findById('some-id')
.exec(doSomethingWithIt);
Saving data
The save
method is an upsert for one document. That means it will create data you give it if it doesn't exist, and will generate an _id
for the document if you don't give it one.
If you do give save
an _id and the data does exist it will update the document.
save
can be called multiple times – it appends to the data you've already added.
New document
db.use('users')
.save({ name: 'Tom' })
.exec(doSomething);
New document with id
db.use('users')
.save({ _id: 'abc123' })
.save({ name: 'Tom' })
.exec(doSomething);
Update existing document
db.use('users')
.save({
_id: 'abc123',
name: 'phuu'
})
.exec(doSomething);
Install
To install file-db, use npm:
npm install file-db
License
MIT