Question

我正在处理从学生表到＆＃34;文件＆＃34;的数据。表
目前我的条件是doc.isDeleted == true？true：false
如何添加检查以查看isDeleted是否存在，如果不存在则将其视为false？

 db.students.find({"studentPicture":{$ne:null}}, { studentPicture:1,studentId:1,isDeleted:1,_id:0}).forEach(function (doc) {

db.documents.insertOne(
            { 
                "className" : "com.model.ModuleDocument", 
                "documentId" : doc.studentPicture, 
                "studentId":doc.studentId,
                "documentTypeStr" : "LICENCE",      
                 "isDeleted": doc.isDeleted==true?true:false
                });

}）;

这似乎错误/不会编译

"isDeleted": if (doc.isDeleted == null){false} else if(doc.isDeleted==true){true} else { false }

Answer 1

简单：

"isDeleted": doc.isDeleted === null ? false : (doc.isDeleted === true ? true : false)

mongodb创建新记录 - 如果字段不存在

1 个答案: