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lowdb - npm Package Compare versions

Comparing version

0.16.2
to
0.17.0

.eslintrc.js
adapters/_stringify.js
adapters/Base.js
adapters/FileAsync.js
adapters/FileSync.js
adapters/LocalStorage.js
adapters/Memory.js
dist/LocalStorage.js
dist/LocalStorage.min.js

172

dist/lowdb.js

@@ -1,3 +0,3 @@

/*! lowdb v0.16.2 */
var low =
/*! lowdb v0.17.0 */
var lowdb =
/******/ (function(modules) { // webpackBootstrap

@@ -11,5 +11,5 @@ /******/ // The module cache

/******/ // Check if module is in cache
/******/ if(installedModules[moduleId])
/******/ if(installedModules[moduleId]) {
/******/ return installedModules[moduleId].exports;
/******/
/******/ }
/******/ // Create a new module (and put it into the cache)

@@ -39,5 +39,2 @@ /******/ var module = installedModules[moduleId] = {

/******/
/******/ // identity function for calling harmony imports with the correct context
/******/ __webpack_require__.i = function(value) { return value; };
/******/
/******/ // define getter function for harmony exports

@@ -70,3 +67,3 @@ /******/ __webpack_require__.d = function(exports, name, getter) {

/******/ // Load entry module and return exports
/******/ return __webpack_require__(__webpack_require__.s = 2);
/******/ return __webpack_require__(__webpack_require__.s = 0);
/******/ })

@@ -81,52 +78,50 @@ /************************************************************************/

var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
var isPromise = __webpack_require__(6);
var memory = __webpack_require__(5);
var defaultStorage = __webpack_require__(4);
var lodash = __webpack_require__(1);
var isPromise = __webpack_require__(2);
var init = function init(db, key, source) {
var _ref = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {},
_ref$storage = _ref.storage,
storage = _ref$storage === undefined ? defaultStorage : _ref$storage,
_ref$format = _ref.format,
format = _ref$format === undefined ? {} : _ref$format;
module.exports = function (adapter) {
if ((typeof adapter === 'undefined' ? 'undefined' : _typeof(adapter)) !== 'object') {
throw new Error('An adapter must be provided, see https://github.com/typicode/lowdb/#usage');
}
db.source = source;
// Create a fresh copy of lodash
var _ = lodash.runInContext();
var db = _.chain({});
// Set storage
// In-memory only if no source is provided
db.storage = _extends({}, memory, db.source && storage);
// Add write function to lodash
// Calls save before returning result
_.prototype.write = _.wrap(_.prototype.value, function (func) {
var funcRes = func.apply(this);
return db.write(funcRes);
});
db.read = function () {
var s = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : source;
function plant(state) {
db.__wrapped__ = state;
return db;
}
var r = db.storage.read(s, format.deserialize);
// Lowdb API
// Expose _ for mixins
db._ = _;
return isPromise(r) ? r.then(db.plant) : db.plant(r);
db.read = function () {
var r = adapter.read();
return isPromise(r) ? r.then(plant) : plant(r);
};
db.write = function () {
var dest = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : source;
var value = (arguments.length <= 1 ? 0 : arguments.length - 1) ? arguments.length <= 1 ? undefined : arguments[1] : db.getState();
var w = db.storage.write(dest, db.getState(), format.serialize);
db.write = function (returnValue) {
var w = adapter.write(db.getState());
return isPromise(w) ? w.then(function () {
return value;
}) : value;
return returnValue;
}) : returnValue;
};
db.plant = function (state) {
db[key] = state;
return db;
};
db.getState = function () {
return db[key];
return db.__wrapped__;
};
db.setState = function (state) {
db.plant(state);
return db.write();
return plant(state);
};

@@ -137,6 +132,2 @@

module.exports = {
init: init
};
/***/ }),

@@ -150,91 +141,2 @@ /* 1 */

/* 2 */
/***/ (function(module, exports, __webpack_require__) {
"use strict";
var lodash = __webpack_require__(1);
var common = __webpack_require__(0);
module.exports = function (source) {
var opts = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
// Create a fresh copy of lodash
var _ = lodash.runInContext();
var db = _.chain({});
// Expose _ for mixins
db._ = _;
// Add write function to lodash
// Calls save before returning result
_.prototype.write = _.wrap(_.prototype.value, function (func) {
var dest = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : source;
var funcRes = func.apply(this);
return db.write(dest, funcRes);
});
return common.init(db, '__wrapped__', source, opts);
};
/***/ }),
/* 3 */
/***/ (function(module, exports, __webpack_require__) {
"use strict";
// Pretty stringify
module.exports = function stringify(obj) {
return JSON.stringify(obj, null, 2);
};
/***/ }),
/* 4 */
/***/ (function(module, exports, __webpack_require__) {
"use strict";
/* global localStorage */
var stringify = __webpack_require__(3);
module.exports = {
read: function browserRead(source) {
var deserialize = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : JSON.parse;
var data = localStorage.getItem(source);
if (data) {
return deserialize(data);
} else {
localStorage.setItem(source, '{}');
return {};
}
},
write: function browserWrite(dest, obj) {
var serialize = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : stringify;
localStorage.setItem(dest, serialize(obj));
}
};
/***/ }),
/* 5 */
/***/ (function(module, exports, __webpack_require__) {
"use strict";
module.exports = {
read: function memoryRead() {
return {};
},
write: function memoryWrite() {
return {};
}
};
/***/ }),
/* 6 */
/***/ (function(module, exports) {

@@ -241,0 +143,0 @@

4

dist/lowdb.min.js

@@ -1,2 +0,2 @@

/*! lowdb v0.16.2 */
var low=function(t){function e(r){if(n[r])return n[r].exports;var o=n[r]={i:r,l:!1,exports:{}};return t[r].call(o.exports,o,o.exports,e),o.l=!0,o.exports}var n={};return e.m=t,e.c=n,e.i=function(t){return t},e.d=function(t,n,r){e.o(t,n)||Object.defineProperty(t,n,{configurable:!1,enumerable:!0,get:r})},e.n=function(t){var n=t&&t.__esModule?function(){return t.default}:function(){return t};return e.d(n,"a",n),n},e.o=function(t,e){return Object.prototype.hasOwnProperty.call(t,e)},e.p="",e(e.s=2)}([function(t,e,n){"use strict";var r=Object.assign||function(t){for(var e=1;e<arguments.length;e++){var n=arguments[e];for(var r in n)Object.prototype.hasOwnProperty.call(n,r)&&(t[r]=n[r])}return t},o=n(6),i=n(5),u=n(4),a=function(t,e,n){var a=arguments.length>3&&void 0!==arguments[3]?arguments[3]:{},c=a.storage,f=void 0===c?u:c,s=a.format,l=void 0===s?{}:s;return t.source=n,t.storage=r({},i,t.source&&f),t.read=function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:n,r=t.storage.read(e,l.deserialize);return o(r)?r.then(t.plant):t.plant(r)},t.write=function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:n,r=(arguments.length<=1?0:arguments.length-1)?arguments.length<=1?void 0:arguments[1]:t.getState(),i=t.storage.write(e,t.getState(),l.serialize);return o(i)?i.then(function(){return r}):r},t.plant=function(n){return t[e]=n,t},t.getState=function(){return t[e]},t.setState=function(e){return t.plant(e),t.write()},t.read()};t.exports={init:a}},function(t,e){t.exports=_},function(t,e,n){"use strict";var r=n(1),o=n(0);t.exports=function(t){var e=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{},n=r.runInContext(),i=n.chain({});return i._=n,n.prototype.write=n.wrap(n.prototype.value,function(e){var n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:t,r=e.apply(this);return i.write(n,r)}),o.init(i,"__wrapped__",t,e)}},function(t,e,n){"use strict";t.exports=function(t){return JSON.stringify(t,null,2)}},function(t,e,n){"use strict";var r=n(3);t.exports={read:function(t){var e=arguments.length>1&&void 0!==arguments[1]?arguments[1]:JSON.parse,n=localStorage.getItem(t);return n?e(n):(localStorage.setItem(t,"{}"),{})},write:function(t,e){var n=arguments.length>2&&void 0!==arguments[2]?arguments[2]:r;localStorage.setItem(t,n(e))}}},function(t,e,n){"use strict";t.exports={read:function(){return{}},write:function(){return{}}}},function(t,e){function n(t){return!!t&&("object"==typeof t||"function"==typeof t)&&"function"==typeof t.then}t.exports=n}]);
/*! lowdb v0.17.0 */
var lowdb=function(t){function e(r){if(n[r])return n[r].exports;var o=n[r]={i:r,l:!1,exports:{}};return t[r].call(o.exports,o,o.exports,e),o.l=!0,o.exports}var n={};return e.m=t,e.c=n,e.d=function(t,n,r){e.o(t,n)||Object.defineProperty(t,n,{configurable:!1,enumerable:!0,get:r})},e.n=function(t){var n=t&&t.__esModule?function(){return t.default}:function(){return t};return e.d(n,"a",n),n},e.o=function(t,e){return Object.prototype.hasOwnProperty.call(t,e)},e.p="",e(e.s=0)}([function(t,e,n){"use strict";var r="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(t){return typeof t}:function(t){return t&&"function"==typeof Symbol&&t.constructor===Symbol&&t!==Symbol.prototype?"symbol":typeof t},o=n(1),u=n(2);t.exports=function(t){function e(t){return i.__wrapped__=t,i}if("object"!==(void 0===t?"undefined":r(t)))throw new Error("An adapter must be provided, see https://github.com/typicode/lowdb/#usage");var n=o.runInContext(),i=n.chain({});return n.prototype.write=n.wrap(n.prototype.value,function(t){var e=t.apply(this);return i.write(e)}),i._=n,i.read=function(){var n=t.read();return u(n)?n.then(e):e(n)},i.write=function(e){var n=t.write(i.getState());return u(n)?n.then(function(){return e}):e},i.getState=function(){return i.__wrapped__},i.setState=function(t){return e(t)},i.read()}},function(t,e){t.exports=_},function(t,e){function n(t){return!!t&&("object"==typeof t||"function"==typeof t)&&"function"==typeof t.then}t.exports=n}]);

6

examples/fp.md

@@ -13,3 +13,3 @@ # lowdb/lib/fp

import low from 'lowdb/lib/fp'
import { concat, find, sortBy, pick } from 'lodash/fp'
import { concat, find, sortBy, take, random } from 'lodash/fp'

@@ -25,3 +25,3 @@ const db = low()

posts.write(
concat({ title: 'lowdb is awesome' })
concat({ title: 'lowdb is awesome', views: random(0, 5) })
)

@@ -37,3 +37,3 @@

sortBy('views'),
pick(5)
take(5)
])

@@ -40,0 +40,0 @@ ```

66

examples/README.md

@@ -6,6 +6,8 @@ # Examples

```js
// cli.js
const low = require('lowdb')
const db = low('db.json')
const FileSync = require('lowdb/adapters/FileSync')
const adapter = new FileSync('db.json')
const db = low(adapter)
db.defaults({ posts: [] })

@@ -30,4 +32,7 @@ .write()

import low from 'lowdb'
const db = low('db')
import LocalStorage from 'lowdb/adapters/LocalStorage'
const adapter = new LocalStorage('db')
const db = low(adapter)
db.defaults({ posts: [] })

@@ -51,3 +56,3 @@ .write()

const low = require('lowdb')
const fileAsync = require('lowdb/lib/storages/file-async')
const FileAsync = require('lowdb/lib/adapters/FileAsync')

@@ -57,8 +62,2 @@ // Create server

// Start database using file-async storage
// For ease of use, read is synchronous
const db = low('db.json', {
storage: fileAsync
})
// Routes

@@ -84,34 +83,30 @@ // GET /posts/:id

// Init
db.defaults({ posts: [] })
.write()
// Create database instance and start server
const adapter = new FileAsync('db.json')
low(adapter)
.then(db => {
db.defaults({ posts: [] })
.write()
})
.then(() => {
app.listen(3000, () => console.log('Server is listening')
})
app.listen(3000, () => console.log('listening on port 3000')
})
```
Using ES7 `async/await` and [Babel](https://babeljs.io/), you can simplify the previous `POST` example above like this:
```js
app.post('/posts', async (req, res) => {
const post = await db.get('posts')
.push(req.body)
.last()
.assign({ id: Date.now() })
.write()
res.send(post)
})
```
## In-memory
In this mode, no storage is used. Everything is done in memory.
With this adapter, calling `write` will do nothing. One use case for this adapter can be for tests.
You can still persist data but you'll have to do it yourself. Here's an example:
```js
const fs = require('fs')
const db = low()
const low = require('low')
const FileSync = require('low/adapters/FileSync')
const Memory = require('low/adapters/Memory')
const db = low(
process.env.NODE_ENV === 'test'
? new Memory()
: new FileSync('db.json')
)
db.defaults({ posts: [] })

@@ -123,7 +118,2 @@ .write()

.write()
// Manual writing
fs.writeFileSync('db.json', JSON.stringify(db.getState()))
```
In this case, it's recommended to create a custom storage.

29

lib/common.js
'use strict';
var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };
var isPromise = require('is-promise');
var memory = require('./storages/memory');
var defaultStorage = require('./storages/file-sync');
var init = function init(db, key, source) {
var _ref = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {},
_ref$storage = _ref.storage,
storage = _ref$storage === undefined ? defaultStorage : _ref$storage,
_ref$format = _ref.format,
format = _ref$format === undefined ? {} : _ref$format;
db.source = source;
// Set storage
// In-memory only if no source is provided
db.storage = _extends({}, memory, db.source && storage);
var init = function init(db, key, adapter) {
db.read = function () {
var s = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : source;
var r = adapter.read();
var r = db.storage.read(s, format.deserialize);
return isPromise(r) ? r.then(db.plant) : db.plant(r);

@@ -31,7 +13,6 @@ };

db.write = function () {
var dest = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : source;
var value = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : db.getState();
var value = (arguments.length <= 1 ? 0 : arguments.length - 1) ? arguments.length <= 1 ? undefined : arguments[1] : db.getState();
var w = adapter.write(db.getState());
var w = db.storage.write(dest, db.getState(), format.serialize);
return isPromise(w) ? w.then(function () {

@@ -53,3 +34,3 @@ return value;

db.plant(state);
return db.write();
return db;
};

@@ -56,0 +37,0 @@

8

lib/fp.js

@@ -8,5 +8,3 @@ 'use strict';

module.exports = function (source) {
var opts = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
module.exports = function (adapter) {
function db(path, defaultValue) {

@@ -21,3 +19,3 @@ function getValue(funcs) {

set(db.getState(), path, result);
return db.write(source, result);
return db.write();
};

@@ -28,3 +26,3 @@

return common.init(db, '__state__', source, opts);
return common.init(db, '__state__', adapter);
};

48

lib/main.js
'use strict';
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
var lodash = require('lodash');
var common = require('./common');
var isPromise = require('is-promise');
module.exports = function (source) {
var opts = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
module.exports = function (adapter) {
if ((typeof adapter === 'undefined' ? 'undefined' : _typeof(adapter)) !== 'object') {
throw new Error('An adapter must be provided, see https://github.com/typicode/lowdb/#usage');
}

@@ -13,15 +17,39 @@ // Create a fresh copy of lodash

// Expose _ for mixins
db._ = _;
// Add write function to lodash
// Calls save before returning result
_.prototype.write = _.wrap(_.prototype.value, function (func) {
var dest = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : source;
var funcRes = func.apply(this);
return db.write(dest, funcRes);
return db.write(funcRes);
});
return common.init(db, '__wrapped__', source, opts);
function plant(state) {
db.__wrapped__ = state;
return db;
}
// Lowdb API
// Expose _ for mixins
db._ = _;
db.read = function () {
var r = adapter.read();
return isPromise(r) ? r.then(plant) : plant(r);
};
db.write = function (returnValue) {
var w = adapter.write(db.getState());
return isPromise(w) ? w.then(function () {
return returnValue;
}) : returnValue;
};
db.getState = function () {
return db.__wrapped__;
};
db.setState = function (state) {
return plant(state);
};
return db.read();
};

6

lib/nano.js

@@ -5,6 +5,4 @@ 'use strict';

module.exports = function (source) {
var opts = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
return common.init({}, '__state__', source, opts);
module.exports = function (adapter) {
return common.init({}, '__state__', adapter);
};

60

package.json
{
"name": "lowdb",
"version": "0.16.2",
"version": "0.17.0",
"description": "JSON database for Node and the browser powered by lodash API",

@@ -21,10 +21,10 @@ "keywords": [

"scripts": {
"test": "npm run tape && standard",
"fix": "standard --fix",
"tape": "tape -r babel-register -r babel-polyfill test/*.js | tap-spec",
"prepublish": "npm run build && pkg-ok",
"precommit": "npm test",
"test": "jest && npm run lint",
"lint": "eslint . --ignore-path .gitignore",
"fix": "npm run lint -- --fix",
"prepublishOnly": "npm run build && pkg-ok",
"build": "npm run build:lib && npm run build:dist",
"build:lib": "rimraf lib && babel src --out-dir lib",
"build:dist": "rimraf dist && webpack && webpack -p"
"build:lib": "rimraf lib && babel src --out-dir lib && mv lib/adapters adapters",
"build:dist": "rimraf dist && webpack && webpack -p",
"precommit": "npm test"
},

@@ -45,2 +45,3 @@ "repository": {

"lodash": "4",
"pify": "^3.0.0",
"steno": "^0.4.1"

@@ -51,29 +52,32 @@ },

"babel-eslint": "^7.0.0",
"babel-loader": "^6.2.2",
"babel-jest": "^20.0.3",
"babel-loader": "^7.1.1",
"babel-polyfill": "^6.9.1",
"babel-preset-es2015": "^6.1.18",
"babel-preset-stage-3": "^6.3.13",
"babel-preset-env": "^1.6.0",
"babel-register": "^6.9.0",
"husky": "^0.13.0",
"lodash-id": "^0.13.0",
"delay": "^2.0.0",
"eslint": "^3.19.0",
"eslint-config-prettier": "^2.3.0",
"eslint-config-standard": "^10.2.1",
"eslint-plugin-import": "^2.6.1",
"eslint-plugin-node": "^5.1.0",
"eslint-plugin-prettier": "^2.1.2",
"eslint-plugin-promise": "^3.5.0",
"eslint-plugin-standard": "^3.0.1",
"husky": "^0.14.3",
"jest": "^20.0.4",
"lodash-id": "^0.14.0",
"mv": "^2.1.1",
"pkg-ok": "^1.0.1",
"ramda": "^0.23.0",
"prettier": "^1.5.2",
"ramda": "^0.24.1",
"regenerator-runtime": "^0.11.0",
"rimraf": "^2.5.4",
"sinon": "^1.17.2",
"standard": "^8.5.0",
"tap-spec": "^4.1.1",
"tape": "^4.2.2",
"tempfile": "^1.1.1",
"webpack": "^2.2.1"
"sinon": "^2.3.8",
"tempfile": "^2.0.0",
"webpack": "^3.3.0"
},
"engines": {
"node": ">= 0.12"
},
"browser": {
"./src/storages/file-sync.js": "./src/storages/browser.js",
"./lib/storages/file-sync.js": "./lib/storages/browser.js"
},
"standard": {
"parser": "babel-eslint"
"node": ">=4"
}
}

234

README.md

@@ -1,8 +0,26 @@

# Lowdb [![NPM version](https://badge.fury.io/js/lowdb.svg)](http://badge.fury.io/js/lowdb) [![Build Status](https://travis-ci.org/typicode/lowdb.svg?branch=master)](https://travis-ci.org/typicode/lowdb)
# Lowdb
> A small local database powered by lodash API
[![](http://img.shields.io/npm/dm/lowdb.svg?style=flat)](https://www.npmjs.org/package/lowdb) [![NPM version](https://badge.fury.io/js/lowdb.svg)](http://badge.fury.io/js/lowdb) [![Build Status](https://travis-ci.org/typicode/lowdb.svg?branch=master)](https://travis-ci.org/typicode/lowdb) [![Support on Patreon](https://img.shields.io/badge/Patreon-%E2%99%A5-ff69b4.svg)](https://www.patreon.com/typicode)
> Lodash powered mini database
```js
const db = low('db.json')
db.get('posts')
.push({ id: 1, title: 'lowdb is awesome'})
.write()
```
## Usage
```sh
npm install lowdb
```
```js
const low = require('lowdb')
const FileSync = require('lowdb/adapters/FileSync')
const adapter = new FileSync('db.json')
const db = low(adapter)
// Set some defaults if your JSON file is empty

@@ -17,3 +35,3 @@ db.defaults({ posts: [], user: {} })

// Set a user
// Set a user using Lodash powerful shorthand syntax
db.set('user.name', 'typicode')

@@ -39,2 +57,3 @@ .write()

```js
// Use .value() instead of .write() if you're only reading from db
db.get('posts')

@@ -47,3 +66,3 @@ .find({ id: 1 })

It supports __Node__, the __browser__ and uses __lodash API__, so it's very simple to learn. Actually... you may already know how to use lowdb :wink:
It supports __Node__, the __browser__ and uses __lodash API__, so it's very simple to learn. Actually, if you know Lodash, you already know how to use lowdb :wink:

@@ -57,32 +76,9 @@ * [Usage examples](https://github.com/typicode/lowdb/tree/master/examples)

* [JSFiddle live example](https://jsfiddle.net/typicode/4kd7xxbu/)
* [__Migrating from 0.14 to 0.15? See this guide.__](https://github.com/typicode/lowdb/releases/tag/v0.15.0)
## Why lowdb?
__Important__ lowdb doesn't support Cluster and may have issues with very large JSON files (~200MB).
* Lodash API
* Minimal and simple to use
* Highly flexible
* __Custom storage__ (file, browser, in-memory, ...)
* __Custom format__ (JSON, BSON, YAML, XML, ...)
* Mixins (id support, ...)
* Read-only or write-only modes
* Encryption
__Important__ lowdb doesn't support Cluster.
## Used by
* [typicode/json-server](https://github.com/typicode/json-server) - REST API with zero coding
* [henryboldi/felony](https://github.com/henryboldi/felony) - Next Level PGP
* [googlesamples/md2googleslides](https://github.com/googlesamples/md2googleslides) - Generate Google Slides from markdown
* [sqren/fb-sleep-stats](https://github.com/sqren/fb-sleep-stats) - Sleeping habits tracker
* [panzhangwang/getAwesomeness](https://github.com/panzhangwang/getAwesomeness) - All amazing awesomeness from Github
* [redux-promise-middleware](https://github.com/pburtchaell/redux-promise-middleware) - Redux middleware
* [sasha-alias/sqltabs](https://github.com/sasha-alias/sqltabs) - Rich SQL client
* ... and [__600+ repositories__](https://libraries.io/npm/lowdb/dependent-repositories)
## Install
```sh
npm install lowdb --save
npm install lowdb
```

@@ -101,4 +97,6 @@

<script src="https://unpkg.com/lowdb/dist/lowdb.min.js"></script>
<script src="https://unpkg.com/lowdb/dist/LocalStorage.min.js"></script>
<script>
var db = low('db')
var adapter = new LocalStorage('db')
var db = low(adapter)
</script>

@@ -109,41 +107,20 @@ ```

__low([source, [options])__
__low(adapter)__
* `source` string or null, will be passed to storage
* `options` object
* `storage` object, by default `lowdb/lib/storages/file-sync` or `lowdb/lib/storages/browser`.
* `read` function
* `write` function
* `format` object
* `serialize` function, by default `JSON.stringify`
* `deserialize` function, by default `JSON.parse`
Returns a lodash [chain](https://lodash.com/docs/4.17.4#chain) with additional properties and functions described below.
Creates a __lodash chain__, you can use __any__ lodash method on it. When `.value()` is called data is saved using `storage`.
__db.[...].write()__ and __db.[...].value()__
You can use `options` to configure how lowdb should persist data. Here are some examples:
`write()` is syntactic sugar for calling `value()` and `db.write()` in one line. On the other side, `value()` is just [\_.protoype.value()](https://lodash.com/docs/4.17.4#prototype-value), use it to execute a chain.
```js
// in-memory
low()
db.set('user.name', 'typicode')
.write()
// persisted using async file storage
low('db.json', { storage: require('lowdb/lib/storages/file-async') })
// is equivalent to
db.set('user.name', 'typicode')
.value()
// persisted using a custom storage
low('some-source', { storage: require('./my-custom-storage') })
// read-only
const fileSync = require('lowdb/lib/storages/file-sync')
low('db.json', {
storage: {
read: fileSync.read
}
})
// write-only
low('db.json', {
storage: {
write: fileSync.write
}
})
db.write()
```

@@ -162,4 +139,5 @@

const post1 = db.get('posts').first().value()
const post2 = db.get('posts').second().value()
db.get('posts')
.second()
.value()
```

@@ -169,3 +147,3 @@

Use whenever you want to access the database state.
Returns database state.

@@ -178,3 +156,3 @@ ```js

Use it to drop database or set a new state (database will be automatically persisted).
Replaces database state.

@@ -186,22 +164,28 @@ ```js

__db.write([source])__
__db.write()__
Persists database using `storage.write` option. Depending on the storage, it may return a promise (for example, with `file-async`).
Persists database using `adapter.write` (depending on the adapter, may return a promise).
By default, lowdb automatically calls it when database changes.
```js
// With lowdb/adapters/FileSync
db.write()
console.log('State has been saved')
```js
const db = low('db.json')
db.write() // writes to db.json
db.write('copy.json') // writes to copy.json
// With lowdb/adapters/FileAsync
db.write()
.then(() => console.log('State has been saved'))
```
__db.read([source])__
__db.read()__
Reads source using `storage.read` option. Depending on the storage, it may return a promise.
Reads source using `storage.read` option (depending on the adapter, may return a promise).
```js
const db = low('db.json')
db.read() // reads db.json
db.read('copy.json') // reads copy.json
// With lowdb/FileSync
db.read()
console.log('State has been updated')
// With lowdb/FileAsync
db.write()
.then(() => console.log('State has been updated'))
```

@@ -217,3 +201,3 @@

Also, the execution of methods is lazy, that is, execution is deferred until `.value()` is called.
Also, the execution of methods is lazy, that is, execution is deferred until `.value()` or `.write()` is called.

@@ -302,3 +286,2 @@ #### Examples

### How to use id based resources

@@ -308,66 +291,71 @@

[lodash-id](https://github.com/typicode/lodash-id) provides a set of helpers for creating and manipulating id-based resources.
[shortid](https://github.com/dylang/shortid) is more minimalist and returns a unique id that you can use when creating resources.
```js
const db = low('db.json')
const shortid = require('shortid')
db._.mixin(require('lodash-id'))
const postId = db
.get('posts')
.push({ id: shortid.generate(), title: 'low!' })
.write()
.id
const postId = db.get('posts').insert({ title: 'low!' }).write().id
const post = db.get('posts').getById(postId).value()
const post = db
.get('posts')
.find({ id: postId })
.value()
```
[uuid](https://github.com/broofa/node-uuid) is more minimalist and returns a unique id that you can use when creating resources.
[lodash-id](https://github.com/typicode/lodash-id) provides a set of helpers for creating and manipulating id-based resources.
```js
const uuid = require('uuid')
const lodashId = require('lodash-id')
const db = low('db.json')
const postId = db.get('posts').push({ id: uuid(), title: 'low!' }).write().id
const post = db.get('posts').find({ id: postId }).value()
db._.mixin(lodashId)
const post = db
.get('posts')
.insert({ title: 'low!' })
.write()
const post = db
.get('posts')
.getById(post.id)
.value()
```
### How to use a custom storage or format
### How to create custom adapters
`low()` accepts custom storage or format. Simply create objects with `read/write` or `serialize/deserialize` methods. See `src/browser.js` code source for a full example.
`low()` accepts custom Adapter, so you can virtually save your data to any storage using any format.
```js
const myStorage = {
read: (source, deserialize) => // must return an object or a Promise
write: (source, obj, serialize) => // must return undefined or a Promise
}
class MyStorage {
constructor() {
// ...
}
const myFormat = {
serialize: (obj) => // must return data (usually string)
deserialize: (data) => // must return an object
read() {
// Should return data (object or array) or a Promise
}
write(data) {
// Should return nothing or a Promise
}
}
low(source, {
storage: myStorage,
format: myFormat
})
const adapter = new MyStorage(args)
const db = low()
```
See [src/adapters](src/adapters) for examples.
### How to encrypt data
Simply `encrypt` and `decrypt` data in `format.serialize` and `format.deserialize` methods.
`FileSync` and `FileAsync` accept custom serializing and deserializing functions.
For example, using [cryptr](https://github.com/MauriceButler/cryptr):
```js
const Cryptr = require("./cryptr"),
const cryptr = new Cryptr('my secret key')
const db = low('db.json', {
format: {
deserialize: (str) => {
const decrypted = cryptr.decrypt(str)
const obj = JSON.parse(decrypted)
return obj
},
serialize: (obj) => {
const str = JSON.stringify(obj)
const encrypted = cryptr.encrypt(str)
return encrypted
}
}
const adapter = new FileSync('db.json', {
serialize: (data) => encrypt(JSON.stringify(data))
deserialize: (data) => JSON.parse(decrypt(data))
})

@@ -388,2 +376,2 @@ ```

MIT - [Typicode](https://github.com/typicode)
MIT - [Typicode :cactus:](https://github.com/typicode)

15

webpack.config.js

@@ -7,9 +7,10 @@ var path = require('path')

module.exports = {
entry: './src/main.js',
entry: {
lowdb: './src/main.js',
LocalStorage: './src/adapters/LocalStorage'
},
output: {
path: path.resolve(__dirname, 'dist'),
filename: process.argv.indexOf('-p') !== -1
? 'lowdb.min.js'
: 'lowdb.js',
library: 'low'
filename: process.argv.indexOf('-p') !== -1 ? '[name].min.js' : '[name].js',
library: '[name]'
},

@@ -19,5 +20,3 @@ externals: {

},
plugins: [
new webpack.BannerPlugin(banner)
],
plugins: [new webpack.BannerPlugin(banner)],
module: {

@@ -24,0 +23,0 @@ loaders: [

lib/storages/_stringify.js
lib/storages/browser.js
lib/storages/file-async.js
lib/storages/file-sync.js
lib/storages/memory.js
.babelrc

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.npmignore

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LICENSE

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