我在parse.com上运行了一些afterSave代码，看来您已经运行了两次。
这是云代码：
Parse.Cloud.afterSave("Review", function(request) {
var query = new Parse.Query("ReviewAverage");
query.equalTo("vendor", request.object.get("vendor"));
query.find({
success: function(average) {
if ( average.length === 1 ){
average = average[0];
average.increment( "numReviews" );
var currentTotal = average.get("totalScore") + request.object.get("rating");
var currentAverage = currentTotal / average.get("numReviews");
average.set("totalScore", currentTotal ) ;
average.set("averageScore", currentAverage) ;
average.save();
} else {
var average = new Parse.Object("ReviewAverage");
average.set("vendor", request.object.get("vendor"));
average.set("numReviews", 1);
average.set("totalScore", request.object.get("rating"));
average.set("averageScore", request.object.get("rating"));
average.save();
}
},
error: function(e){
console.error("Error updating averages: " + e);
}
});
});
我有我的审阅表，而且，而不是动态地计算同一项目的审阅平均值（因为解析不支持按类型分组功能），我还有另一个表，该表仅跟踪某项的移动平均值（由供应商确定键） ）。
我注意到，ReviewAverage列中给定供应商的numReviews与同一个vendo的实际Reviews数量之间存在一些差异。
在日志中，我看到类似以下内容：
I2014-11-14T08:08:45.818Z] v13: after_save triggered for Review for user dA73DS733H
Input: {"author":{"className":"_User","objectId":"dA73DS733H","__type":"Pointer"},"createdAt":"2014-11-14T08:08:45.815Z","objectId":"j1wfWfQabv","rating":7,"review":"Lacking pigs in blankets and would have benefitted from more crunchy stuffing but otherwise good - the healthy Christmas option.","updatedAt":"2014-11-14T08:08:45.815Z","vendor":"Pret - Christmas veggie lunch","ACL":{"dA73DS733H":{"read":true,"write":true},"*":{"read":true}}}
Result: Success
I2014-11-14T08:08:46.278Z] v13: after_save triggered for Review for user dA73DS733H
Input: {"author":{"__type":"Pointer","className":"_User","objectId":"dA73DS733H"},"rating":7,"review":"Lacking pigs in blankets and would have benefitted from more crunchy stuffing but otherwise good - the healthy Christmas option.","vendor":"Pret - Christmas veggie lunch","createdAt":"2014-11-14T08:08:45.815Z","updatedAt":"2014-11-14T08:08:46.260Z","objectId":"j1wfWfQabv","ACL":{"*":{"read":true},"dA73DS733H":{"read":true,"write":true}}}
Result: Success
我看到有些人有问题，因为他们在afterSave函数中重新保存了-但我的保存只保存到了ReviewAverage对象，所以应该没有理由再次触发吗？
我想念什么吗？
最佳答案
我也有afterSave的问题，在其中使用指向现有对象（Y型）的指针创建新对象（X型）会导致触发对象（Y型）上的afterSave。
因此，如果我保存两个对象，似乎afterSave被触发了两次。
您在ReviewAverage类中的指针中是否有任何类型的列？