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New feature: Model.get fallback callback/value. #1184

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New feature: Model.get fallback callback/value. #1184

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10 changes: 6 additions & 4 deletions backbone.js
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Expand Up @@ -237,8 +237,10 @@
},

// Get the value of an attribute.
get: function(attr) {
return this.attributes[attr];
get: function(attr, fallback) {
if (this.has(attr)) return this.attributes[attr];
if (_.isFunction(fallback)) fallback = fallback.call(this);
return fallback;
},

// Get the HTML-escaped value of an attribute.
Expand All @@ -252,7 +254,7 @@
// Returns `true` if the attribute contains a value that is not null
// or undefined.
has: function(attr) {
return this.get(attr) != null;
return this.attributes[attr] != null;
},

// Set a hash of model attributes on the object, firing `"change"` unless
Expand Down Expand Up @@ -1428,4 +1430,4 @@
throw new Error('A "url" property or function must be specified');
};

}).call(this);
}).call(this);