無法使用parse.com查詢和javascript SDK搜索用戶

Question

我想使用parse.com和JavaScript SDK，創建一個查詢來檢查用戶是否已經存在。

這里有示例代碼，我已經采用並變成了下面的代碼塊。 我收到了Uncaught ReferenceError: username is not defined錯誤，我不明白為什么？

https://www.parse.com/docs/js_guide#users

var friendFinder = Parse.Object.extend("_User");
var query = new Parse.Query(Parse.User);
query.equalTo(username, "d"); // find users that match
query.find({
    success: function (friend) {
        if (friendName.length) {
            console.log("Success")
        }
    },
    error: function (error) {
        //Show if no user was found to match


    }
});

Answer 1

您忘記了“用戶名”字段上的引號：

var friendFinder = Parse.Object.extend("_User");
var query = new Parse.Query(Parse.User);
query.equalTo("username", "d"); // find users that match
query.find({
    success: function (friend) {
        if (friendName.length) {
            console.log("Success")
        }
    },
    error: function (error) {
        //Show if no user was found to match


    }
});