Question: How do you implement this via CLI?

[sundeepgupta]

I thought I should be implementing this using the CLI so that it could be part of a deploy sequence, something like:

Note: I've aliased loopback-component-migrate binary command to lcm

1. npm install
2. lcm up
3. node server.js

I created a migration via lcm create initial which created the migration file in ./migrations/20160810101725-initial.js. The migration file looks like:

module.exports = {
  up: function(dataSource, next) {
    console.log('running initial up');
    next();
  },
  down: function(dataSource, next) {
    console.log('running initial down');
    next();
  }
};

When I run lcm up, first thing output is "Migrating up to: "20160810101725-initial.js" [TODO]" and then I see output from starting the app up, just like I'd see if I ran node server.js. I don't see the logs I inserted into the migration or anything. The app continues to listen for web requests/socket messages...

I'm using MongoDB as my data store and when I look inside, I don't see a collection for Migrations or anything.

[jcolemorrison]

when I use the CLI up command it just hangs for me on the Migrating up to: "name-of-migrationfile" [TODO]

[jcolemorrison]

For anyone else having troubles with this, I just gave up. This doesn't seem to work at all with 3.x. There's actually a pretty reliable pattern you can achieve just using automigrate when you need to create new tables or seed data and then autoupdate to keep things in sync without having to worry about a convoluted solution:

Authorized Resources and Database Migrations with Strongloop's Loopback

[curioustushar]

any plans to implement these features?

@sundeepgupta any idea?

[mrfelton]

Thanks for implementing this @ivesdebruycker

[mrfelton]

@jcolemorrison this package is less about keeping database schema changes in sync (which you can do with autoupdate as you mention), and more about running data migrations against your database in order to change your existing data if your application's data expectations change.