Auto-generate migrations for models

[kevinob11]

A new feature that I think might be useful for sails migrations:

The ability to auto-generate a migration based on a model file. It wouldn't consistently auto-generate migrations for changes, as this seems like it would be difficult and require managing state. The thought is more of a one-time per model time saver. You define your model then call: sails-migrations generate:model [name of model] It then parses the model file and creates a migration file based on that model. It doesn't have to parse everything in attributes, if there is some non-standard or in-depth attribute we can just rely on the user updating the migration file to handle that attribute. In my mind the low hanging fruit are:

• Table Names
• Column Names
• Types
• Required (though waterline ignores this in auto-migrations, so maybe we should too)
• Unique
• Simple relations (make them integers)
• More complex relations (Too difficult without having context on both models?)

I'm happy to take a hack at it, but it will just be weekend time which itself is a bit limited right now for me.