Question

我有Meteor.method检查现有文档。当它没有找到它插入文件时，第二次发现它更新并插入。请帮助检查并修复以下代码：

'upload': function upload(data, name, eventId) {
    const wb = XLSX.read(data, {type:'binary'});
    var checkUpdate;
    XLSX.utils.sheet_to_json(wb.Sheets[wb.SheetNames[0]]).forEach(r => {
        r.owner = this.userId,
        r.username = Meteor.user().username,
        r.updatedAt = new Date(),
        r.amount = Number(r.amount),
        r.eventid = eventId,
        r.firstname = r.firstname.trim(),
        r.lastname = r.lastname.trim(),
        Registers.findOne({ firstname: r.firstname, lastname: r.lastname, eventid: eventId }) ? 
        Registers.update({ firstname: r.firstname, lastname: r.lastname, eventid: eventId }, { $set: {updatedAt: r.updatedAt, amount: r.amount } })
        : 
        r.createdAt = new Date(),
        Registers.insert(r)
    })

    return wb;
},

第一次，如果数据库为空，则插入新文档。第二次，如果它找到了文档然后更新文档，并且还插入具有更新功能的新文档而不插入功能。

meteor:PRIMARY> db.registers.find({ eventid: "aZrumf45q8sBGGrY2" })
{ "_id" : "MzqD73vsgyxRTyekJ", "salution" : "Mr.", "firstname" : "qwer", "lastname" : "asdf", "gender" : "Male", "age" : "38", "province" : "chiangmai", "amount" : 1000, "owner" : "rBjWm4PRTHwAo2vRS", "username" : "mai", "updatedAt" : ISODate("2017-09-11T12:28:36.966Z"), "eventid" : "aZrumf45q8sBGGrY2", "createdAt" : ISODate("2017-09-11T12:20:49.731Z") }
{ "_id" : "suzPhYkvQQcYjZj5p", "salution" : "Mr.", "firstname" : "abcd", "lastname" : "efgh", "gender" : "Male", "age" : "30", "province" : "chiangmai", "amount" : 500, "owner" : "rBjWm4PRTHwAo2vRS", "username" : "mai", "updatedAt" : ISODate("2017-09-11T12:28:37.017Z"), "eventid" : "aZrumf45q8sBGGrY2", "createdAt" : ISODate("2017-09-11T12:20:49.739Z") }
{ "_id" : "QYgF7aLvBDwo5amuA", "salution" : "Mr.", "firstname" : "qwer", "lastname" : "asdf", "gender" : "Male", "age" : "38", "province" : "chiangmai", "amount" : 1000, "owner" : "rBjWm4PRTHwAo2vRS", "username" : "mai", "updatedAt" : ISODate("2017-09-11T12:28:36.966Z"), "eventid" : "aZrumf45q8sBGGrY2" }
{ "_id" : "XYSBxgiz5T9QXad6r", "salution" : "Mr.", "firstname" : "abcd", "lastname" : "efgh", "gender" : "Male", "age" : "30", "province" : "chiangmai", "amount" : 500, "owner" : "rBjWm4PRTHwAo2vRS", "username" : "mai", "updatedAt" : ISODate("2017-09-11T12:28:37.017Z"), "eventid" : "aZrumf45q8sBGGrY2" }

从代码中，当我第二次添加两次时，我丢失了createdAt字段。我不知道为什么。????

我有它!!!!非常感谢您的所有评论

'upload': function upload(data, name, eventId) {
    const wb = XLSX.read(data, {type:'binary'});
    var checkUpdate;
    XLSX.utils.sheet_to_json(wb.Sheets[wb.SheetNames[0]]).forEach(r => {
        if (!Registers.findOne({ firstname: r.firstname, lastname: r.lastname, eventid: eventId })) {
        r.owner = this.userId,
        r.username = Meteor.user().username,
        r.updatedAt = new Date(),
        r.amount = Number(r.amount),
        r.eventid = eventId,
        r.firstname = r.firstname.trim(),
        r.lastname = r.lastname.trim(),
        r.createdAt = new Date(),
        Registers.insert(r)
        } else {
        r.owner = this.userId,
        r.username = Meteor.user().username,
        r.updatedAt = new Date(),
        r.amount = Number(r.amount),
        r.eventid = eventId,
        r.firstname = r.firstname.trim(),
        r.lastname = r.lastname.trim(),
        Registers.update({ firstname: r.firstname, lastname: r.lastname, eventid: eventId }, { $set: {updatedAt: r.updatedAt, amount: r.amount } })
        }
    })
    return wb;
},

Answer 1

我认为您正在寻找Collection.upsert方法。

基本上它会修改集合中的一个或多个文档，或者如果找不到匹配的文档则插入一个文档。返回一个对象，其中numberAffected键（已修改的文档数）和insertedId（已插入文档的唯一_id，如果有）。

如何防止更新功能从Meteor插入到MongoDB？

1 个答案: