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Minimalistic extensible data models

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Readme.md

model

W.I.P minimalistic extensible model component.

API

model(name)

Create a new model with the given name.

var model = require('model');
var User = model('User');

.attr(name, [meta])

Define an attribute name with optional meta data object.

var model = require('model');

var Post = model('Post')
  .attr('id')
  .attr('title')
  .attr('body')
  .attr('created_at')
  .attr('updated_at')

With meta data used by plugins:

var model = require('model');

var Post = model('Post')
  .attr('id', { required: true, type: 'number' })
  .attr('title', { required: true, type: 'string' })
  .attr('body', { required: true, type: 'string' })
  .attr('created_at', { type: 'date' })
  .attr('updated_at', { type: 'date' })

.validate(fn)

TODO: validation callback docs

.use(fn)

TODO: plugin docs

.url([path])

Return base url, or url to path.

User.url()
// => "/users"

User.url('add')
// => "/users/add"

.ATTR()

"Getter" function generated when Model.attr(name) is called.

var Post = model('Post')
  .attr('title')
  .attr('body')

var post = new Post;
post.title('Ferrets')
post.body('Make really good pets')

.ATTR(value)

"Setter" function generated when Model.attr(name) is called.

var Post = model('Post')
  .attr('title')
  .attr('body')

var post = new Post({ title: 'Cats' });

post.title()
// => "Cats"

post.title('Ferrets')
post.title()
// => "Ferrets"
  • Emits "change" event with (name, value, previousValue).
  • Emits "change ATTR" event with (value, previousValue).
post.on('change', function(name, val, prev){
  console.log('changed %s from %s to %s', name, prev, val)
})

post.on('change title', function(val, prev){
  console.log('changed title')
})

.isNew()

Returns true if the model is unsaved.

.toJSON()

Return a JSON representation of the model (its attributes).

.has(attr)

Check if attr is non-null.

.get(attr)

Get attr's value.

.set(attrs)

Set multiple attrs.

user.set({ name: 'Tobi', age: 2 })

.changed([attr])

Check if the model is "dirty" and return an object of changed attributes. Optionally check a specific attr and return a Boolean.

.error(attr, msg)

Define error msg for attr.

.isValid()

Run validations and check if the model is valid.

user.isValid()
// => false

user.errors
// => [{ attr: ..., message: ... }]

.url([path])

Return this model's base url or relative to path:

var user = new User({ id: 5 });
user.url('edit');
// => "/users/5/edit"

.save(fn)

Save or update and invoke the given callback fn(err).

var user = new User({ name: 'Tobi' })

user.save(function(err){

})

Emits "save" when complete.

.destroy([fn])

Destroy and invoke optional fn(err).

Emits "destroy" when successfully deleted.

Links

Testing

$ npm install
$ make test &
$ open http://localhost:3000

License

MIT

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