I have a backbone model and collection. In the model, the default attribute values are defined:
var Person = Backbone.Model.extend({
defaults: {
name: "mark",
middle: "-"
}
});
var People = Backbone.Collection.extend({
model: Person
});
var collection = new People();
collection.add({name: "paul", middle: null});
console.log('collection is ');
console.log(collection);
I want the default value for "middle", which is "-", to be taken if "null" is passed in for the attribute "middle". However, "null" overrides the default instead. How do I do this? The jsfiddle is here
The cleanest way probably is to add a parse
method and normalize the data:
var Person = Backbone.Model.extend({
defaults: {
name: 'mark',
middle: '-'
},
parse: function (payload) {
return {
name: payload.name || undefined,
middle: payload.middle || undefined
};
}
});
collection.add({name: "paul", middle: null}, {parse: true});
fetch
it will automatically go through parse
and there's no need to call pass the option flag.You could do it either on the model level or at the collection level.