High Level leveldb indexing API using level-auto-index.
npm install level-idx
Index posts by title and body length, then query for them:
var Index = require('level-idx')
var level = require('memdb')
var sub = require('subleveldown')
var db = level()
var posts = sub(db, 'posts', {valueEncoding: 'json'})
var idx = sub(db, 'idx')
Index(posts, idx)
.by('Title', 'title')
.by('Length', ['body.length', 'title'])
.by('Author', ['author', 'title'])
var post = {
title: 'a title',
body: 'lorem ipsum',
author: 'julian'
}
posts.put('1337', post, function (err) {
if (err) throw err
posts.byTitle.get('a title', console.log)
posts.byLength.get('11!a title', console.log)
posts.byAuthor.get('julian!a title', console.log)
})Index db into idb.
Create an index called name and index by props.
props should be a string or an array of strings that each name a property.
Deep object access is enabled via
deep-access. Use multiple
properties if you can't guarantee the uniqueness of the first property's
value.
If a property doesn't exist, e.g. if you want to index by body.length but there is no key body, it will be ignored.
The underlying db.
See level-auto-index.
Populate db.methods with the manifests of each indexed db.object:
var index = require('level-idx');
var createManifest = require('level-manifest');
db.methods = {};
db.posts = index(db.sublevel('posts'))
.by('Slug', ['slug'])
.db;
db.methods.posts = {
type: 'object',
methods: createManifest(db.posts).methods
};- hypermodules/level-hookdown - Simple levelup hooks implemented using instance method override of arbitrary levelups.
- hypermodules/level-auto-index - Automatic secondary indexing for leveldb and subleveldown leveraging
level-hookdown.
This module is a port of juliangruber/level-sec that works/uses subleveldown and level-auto-index.