搜索功能在AngularJS中不起作用

Question

我试图根据名称进行搜索，但它无法正常工作。以下是我使用的代码：

用于显示的HTML代码：

<div ng-controller="PhoneBookUserCtrl as pu">
        <h2>User controller to get the User details</h2>
        <span>Enter name in the textbox to get details</span>
        <input type="text" ng-model="pu.name" /> 
        <button ng-click="pu.get(pu.name)">Get</button>

        <p>User Information</p>
        <p><b>Name : </b> {{pu.userInfo.name}}</p>
        <p><b>Email : </b> {{pu.userInfo.email}}</p>
        <p><b>Number : </b> {{pu.userInfo.number}}</p>
</div>

Angular Code：

内部服务 - 搜索功能：

this.getInfo=function(name){
var info= "";
for(var i=0; i<contacts.lenght;i++){
if(contacts[i].name.indexOf(name) >= 0){
    info = contacts[i];
    console.log(info);
    break;
} else{ alert("Not found");}


}

console.log("inside getInfo");  //its getting executed

return info;

}

控制器内的代码调用函数

app.controller("PhoneBookUserCtrl",['contacts', function(contacts){
  this.get=function(name) {
    this.userInfo = contacts.getInfo(name);
    console.log("Inside User Controller"); //its getting executed
  }

}]);

如何让它发挥作用，需要做哪些改变？