Custom ID on insert

I am trying to automatically create custom generated ID’s, instead of auto incrementing every time I make an insert.

I have created a custom function that gets called on creation but do not see this change reflected and getting some strange errors (it thinks its an update not an insert). Is this the correct place to put my custom function.

Here is my model:

db = require('../db.coffee')

Proxy = db.Model.extend(
  tableName: "proxies"
  initialize: () ->
    this.on("creating", this.createId("prefix_"))
  hasTimestamps: ["date_created", "date_modified"]
)

Here is my insert:

new Proxy().save(name: request.payload.name).then (model) ->
    reply('success')

Any ideas on the best way to implement this?

[bendrucker]

Bookshelf determines whether a particular operation is an update or an insert based on whether it has an ID. (http://bookshelfjs.org/#Model-isNew) If you think about it, that makes sense—in most cases you won’t have an ID until you insert to the DB and the auto-incremented ID is returned. You can always override this behavior by expressly specifying a method in the save options, either insert or update.

new Proxy.save(data, {method: 'insert'});

It would help to see your createId method in order to diagnose why it’s not working. Keep in mind though that on expect an event handler, so unless createId returns a function, your code won’t work.

Unfortunately using a pre-defined ID means you have to manually specify any time you want to do an insert. There’s no way for Bookshelf to decide whether a model has been persisted or not if it can’t rely on the ID.

[eltonk]

Thanks for the answers… The problem happened when I tried to load the models using express-load. When I changed to use the ‘required old style’, everything works as expected.

Regards