mongoose-acid

:sunglasses: mongoose transaction helper

prompt

if you are using mongodb's multi-document transaction capabilities, your version of mongodb needs to be larger than 4.0, and you need a replication set for transactions to work, in mongodb4.2, multi-document transactions will be supported on sharding

install

npm i mongoose-acid mongoose -S

required

• nodejs >= 7.6
• mongoose >= 5.2
• mongodb >= 4.0

usage

normal

const Acid = require('mongoose-acid')
await Acid(async function (session) {
    // if you set context then this === context
    await People.findOneAndUpdate({ name: 'Acid' },{ $inc: { balance: 30 } },{ session })
    await Account.findOneAndUpdate({ name: 'Blank'},{ $inc: { balance: -30 } },{ session })
}, context)

in koa

const Acid = require('mongoose-acid')
const app = new Koa()
app.use(Acid.middleware())
app.use(async (ctx) => {
    await ctx.acid(async function(session) {
      // this === ctx
    })
})

session option position

• Model.create([], { session })
• Model.deleteOne(condition, { session })
• Model.deleteMany(condition, { session })
• Model.updateOne(condition, update, { session })
• Model.updateMany(condition, update, { session })
• Model.update(condition, update, { session })
• Model.insertMany(docs, { session })
• Model.findById(id, selects, { session })
• Model.findByIdAndUpdate(id, update, { session })
• Model.findByIdAndRemove(id, { session })
• Model.findByIdAndDelete(id, { session })
• Model.findOne(condition, selects, { session })
• Model.findOneAndUpdate(condition, update, { session })
• Model.findOneAndRemove(condition, { session })
• Model.findOneAndDelete(condition, { session })
• model.save({ session })
• model.remove({ session })

debug

Acid.set('debug', true)

notice

• The collection cannot be created in a transaction and will report an error, so you need to create the collection before using the mongoose and mongodb transaction functions
• Note that if the model is returned by a query with the session option set, you do not need to set it again
• Note that the first argument to the Model.create method must be an array, and the second argument can set the session option

test

npm test