我是一个MongoDB新手,使用Mongoose在MongoDB中删除数组中的团队对象时遇到了问题。我的用户集合如下:
{ "orders":[],
"teams":[
{
"teamname":"Team One",
"_id":{"$oid":"566a038404ebcdc344c5136c"},
"members":[
{
"firstname":"Member ",
"lastname":"Three",`enter code here`
"email":"memberthree@team.com",
"initials":"MT",
"_id":{"$oid":"566a038404ebcdc344c5136d"}
},
]
},
{
"teamname":"Team Two",
"_id":{"$oid":"566a07f404ebcdc344c51370"},
"members":[
{
"firstname":"Member",
"lastname":"Two",
"email":"membertwo@team.com",
"initials":"MT",
"_id":{"$oid":"566a07f404ebcdc344c51371"}
},
]
},
{
"teamname":"Team Three",
"_id":{"$oid":"566a083504ebcdc344c51373"},
"members":[
{
"firstname":"Member",
"lastname":"Four",
"email":"memberfour@team.com",
"initials":"MF",
"_id":{"$oid":"566a083504ebcdc344c51374"}
},
]
}
],
}
我的删除路径如下:
exports.getTeamDelete = function(req, res) {
User.findById(req.user.id, function(err, user) {
if (err) return next(err);
var selectedTeamIndex;
for (i = 0; i < user.teams.length; i++){
if (user.teams[i]._id==req.params.teamid){
selectedTeamIndex=i;
break
}
}
console.log("before", user.teams)
console.log(req.params.teamid)
teamID=req.params.teamid;
userID=req.user.id;
User.update(
{'_id': userID},
{ $pull: { "teams" : { teamID } } },
{ multi: true },
function(err, data){
console.log(err, data);
}
);
user.markModified("teams");
user.save(function(err) {
console.log("after", user.teams)
if (err) return next(err);
req.flash('success', { msg: 'Team deleted' });
});
});
};
控制台在User.update之前和之后记录的内容完全相同,我没有收到任何错误提示。console.log(err,data) 的输出结果是:
null { ok: 1, nModified: 0, n: 1 }
我不太确定如何解释这个问题。我已经尝试按照这里建议的方式,不传递userID,但结果相同。此外,我还尝试了以下用户更新方法;
User.update(
{'_id': userID},
{ $pull: { "teams" : { id: teamID } } },
false,
true
);
正如在这里提到的https://dev59.com/gmUo5IYBdhLWcg3w9TTb#15641895,会导致以下错误:
/Users/markbreneman/Desktop/GatherRoundApp/node_modules/mongoose/lib/query.js:2022
oldCb(error, result ? result.result : { ok: 0, n: 0, nModified: 0 });
^
TypeError: oldCb is not a function
我也不确定如何解释它。如果有人能够解释我做错了什么,或者如何轻松地从我的团队数组中移除一个团队,我将不胜感激。