mongoose-migration

mongoose-migration

Install

npm install -save mongoose-migration

usage

Init configuration

migrate init

Create a migration

migrate create <description>

Example: migrate create "Add createdAt to users collection"

Edit Migration File

Open up your migration file (created on the previous step). It should have a default up and down function.

Example:

exports.up = function(next) {
  next();
};

exports.down = function(next) {
  next();
};

To load a model you should call this.model(<model name>)

Example:

exports.up = function(next) {
  this
    .model('User')
    .update(
      {},
      {
        $set: { createdAt: Date.now() }
      },
      {
        multi: true,
        strict: false
      },
      function (error, numberAffected, raw) {
        if (error) {
          console.error(error);
        }
        console.log('The number of updated documents was %d', numberAffected);
        console.log('The raw response from Mongo was ', raw);
        next();
      }
    );
};

exports.down = function(next) {
  this
    .model('User')
    .update(
      {},
      {
        $unset: { createdAt: 1 }
      },
      {
        multi: true,
        strict: false
      },
      function (error, numberAffected, raw) {
        if (error) {
          console.error(error);
        }
        console.log('The number of updated documents was %d', numberAffected);
        console.log('The raw response from Mongo was ', raw);
        next();
      }
    );
};

Perform Migration

migrate

or

migrate up <number of migrations to perform>

Rollback Migration

migrate down

or

migrate down <number of migrations to rollback>

Help

migrate -h