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modifiers.coffee

Usually if You want to update Model You load it, make changes and save it back. But if You want to update only some of attributes there's more efficient way - modifiers.

In this example we'll create simple Model and update it using modifiers.

 
Model = require 'mongo-model'

Enabling optional synchronous mode.

 
require 'mongo-model/lib/sync'
sync = ->

Connecting to default database and clearing it before starting.

 
  db = Model.db()
  db.clear()

Defining game Unit.

 
  class global.Unit extends Model
    @collection 'units'

Creating brave Tassadar.

 
  tassadar = Unit.create name: 'Tassadar', life: 80

Updating Model with modifiers.

 
  tassadar.update $inc: {life: -40}
  tassadar.reload()
  assert tassadar.life, 40

There's also helper on the model class.

 
  Unit.update {id: tassadar.id}, {$inc: {life: -20}}
  tassadar.reload()
  assert tassadar.life, 20

Closing connection.

 
  db.close()

This stuff needed for synchronous mode.

 
Fiber(sync).run()

global.assert = (args...) -> require('assert').deepEqual args...

In this example we covered using modifiers with Model.