mongostate

Data state machine. Support transaction in mongoose.

中文文档

Installation

$ npm install mongostate --save

Example

const Person = require('./Person');
const Wallet = require('./Wallet');
const co = require('co');
const Transaction = require('../');
const connection = require('./connection');

co(function * () {
  yield connection.dropDatabase();
  const t = yield Transaction.init({ connection });
  yield t.try(function * () {
    yield createPersonAndRecharge.bind(this)({
      name: 'Misery',
      gender: 'male',
      amount: 100
    })
  });
  const person = yield Person.find();
  const wallet = yield Wallet.find();
  console.log(person, wallet);
}).catch(console.error);

function * createPersonAndRecharge ({ name, gender, amount }) {
  const TPerson = this.use(Person);
  const TWallet = this.use(Wallet);
  const person = yield TPerson.create({ name, gender });
  const wallet = yield TWallet.create({ person: person.id });
  yield TWallet.findByIdAndUpdate(wallet.id, { $inc: { money: amount } });
}

API

init the transaction with mongoose connection and other options params like:

• transactionCollectionName default: 'transaction', where to save the transaction data.
• lockCollectionName default: 'lock', where to save the lock data.
• id If id is passed, the transaction will init by the certain id and if there is a transaction with the same id in the collection, it will be used the continue.
• historyConnection If historyConnection is passed, you can use this.use(Person, true) to enable Person model to record histories.

Make all unsafe operations in try method, and they will be automatic rollback when some error thrown in the closure.

These methods can be used as mongoose methods.

• * create
• * findByIdAndUpdate
• * findOneAndUpdate
• * findByIdAndRemove
• * findOneAndRemove
• * findOne
• * findById

These methods are for history supporting. Check example for detail usage.

• * findHistories
• * findLatestHistory
• * revertTo

These static methods are for more advanced usage.

• getTransactionModel
• getLockModel

Contributing

• Fork this Repo first
• Clone your Repo
• Install dependencies by $ npm install
• Checkout a feature branch
• Feel free to add your features
• Make sure your features are fully tested
• Publish your local branch, Open a pull request
• Enjoy hacking <3

MIT license

Copyright (c) 2016 Misery Lee <[email protected]>

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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