分析-未捕获类型错误:无法读取属性'获取'的未定义

Parse - Uncaught TypeError: Cannot read property 'get' of undefined

本文关键字：属性 读取 未定义 获取 类型 错误 分析      更新时间：2023-09-26

我正在使用带有javascript的Parse。我正在尝试获取一个对象，并且正在密切关注文档。我仍然以错误结束

未捕获的类型错误：无法读取未定义的属性"get"

$(document).ready(function(){
Parse.initialize("myInfo","myInfo");
var count = Parse.Object.extend('overallCount');
var myQuery = Parse.Query(count);
myQuery.get('Gqwk38uUYz', {  //HERE IS THE PROBLEM
    success: function(count) {
        // The object was retrieved successfully.
        var myCount = count.get('count');
        var updatedCount = myCount+1;
        $("#myNum").val(updatedCount);
        count.save(null, {
            success: function(count) {
                count.set('count', updatedCount);
                count.save();
            },
            error: function(model, error) {
                // This will be called.
                // error is an instance of Parse.Error with details about the error.
                if (error.code === Parse.Error.OBJECT_NOT_FOUND) {
                    alert("Uh oh, we couldn't find the object!");
                } else if (error.code === Parse.Error.CONNECTION_FAILED) {
                    alert("Uh oh, we couldn't even connect to the Parse Cloud!");
                }
            }
        });
    },
    error: function(object, error) {
        // The object was not retrieved successfully.
        // error is a Parse.Error with an error code and message.
    }
});
});

您收到错误是因为myQuery确实未定义。您必须使用"new"来创建查询对象。将类名大写也是一种很好的做法：

var Count = Parse.Object.extend('overallCount');
var myQuery = new Parse.Query(Count);
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