我的诺言总是拒绝即使我传递的参数_name与集合中的_name都不总是相同的，任何帮助将不胜感激，谢谢！
myCheckUser(_name) {
var self = this;
return new Promise((resolve, reject) => {
self.db.collection("USER").find({ "username": _name }, { $exists: true }).toArray(function (err, doc) //find if a value exists
{
console.log("DOC USERNAME: " + doc.username);
if (doc) //if it does
{
reject("Found user");
console.log(doc.username); // print out what it sends back
}
else // if it does not
{
console.log("Not in docs");
resolve("Not found continue logic!")
}
}
)
});
};如果找到数据，您必须解决承诺并拒绝承诺。我已更正以下代码：
myCheckUser(_name) {
var self = this;
return new Promise((resolve, reject) => {
self.db.collection("USER").find({ "username": _name }, { $exists: true }).toArray(function (err, doc) //find if a value exists
{
if (doc && doc.length) //if it does
{
console.log(doc); // print out what it sends back
resolve("Found user");
}
else // if it does not
{
console.log("Not in docs");
reject("Not found continue logic!")
}
}
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我来说两句