javascript - Looping over attributes in validation fails to stop set of attribute -

normally in backbone validation, have crazy amount of if() statements, i've seen in many other code samples well. validation pretty crap shoot in backbone; however, if() way seems work. want clean code bit , wrote code return error should stop backbone saving attribute, doesn't!

old code works

validate : function(attr){     if(attr.firstname){         var defaultvalue = 'first name',             value = attr.firstname.tolowercase();          if(value == defaultvalue){             return 'error';         }     } } 

new code doesn't work

//my default strings place myapp.strings.defaults = {     firstname : 'first name' }  //model validate function validate : function(attr){     jquery.each(attr, function(key, value){         var defaultvalue = myapp.strings.defaults[key];          if(defaultvalue){             defaultvalue = jquery.trim(defaultvalue.tolowercase());              if(value == defaultvalue){                 console.log(value, defaultvalue); //fires, , outputs both being same                 return 'error';             }         }     }); } 

are not allowed loop on attributes in backbone validation?

you not returning value validate method, returning 'error' each() callback method, not validate

//my default strings place myapp.strings.defaults = {     firstname : 'first name' }  //model validate function validate : function(attr){     var error;     jquery.each(attr, function(key, value){         var defaultvalue = myapp.strings.defaults[key];          if(defaultvalue){             defaultvalue = jquery.trim(defaultvalue.tolowercase());              if(value.tolowercase() == defaultvalue){                 console.log(value, defaultvalue); //fires, , outputs both being same                 error = 'error';                 return false;             }         }     });     return error; }