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Legal Studies如何在 MongoDB 中利用 for 循环推送值？
要推送值，请将 save() 与 for 循环一起使用。让我们使用文档创建集合 −
> for(var v=1; v<7; v++) {
... db.demo739.save({Name:"Chris",SubjectName:"MongoDB"});
... }
WriteResult({ "nInserted" : 1 })利用 find() 方法显示某个集合中的所有文档 −
> db.demo739.find();
这将产生以下输出 −
{ "_id" : ObjectId("5ead6e7857bb72a10bcf0666"), "Name" : "Chris", "SubjectName" : "MongoDB" }
{ "_id" : ObjectId("5ead6e7857bb72a10bcf0667"), "Name" : "Chris", "SubjectName" : "MongoDB" }
{ "_id" : ObjectId("5ead6e7857bb72a10bcf0668"), "Name" : "Chris", "SubjectName" : "MongoDB" }
{ "_id" : ObjectId("5ead6e7857bb72a10bcf0669"), "Name" : "Chris", "SubjectName" : "MongoDB" }
{ "_id" : ObjectId("5ead6e7857bb72a10bcf066a"), "Name" : "Chris", "SubjectName" : "MongoDB" }
{ "_id" : ObjectId("5ead6e7857bb72a10bcf066b"), "Name" : "Chris", "SubjectName" : "MongoDB" }
更新时间： 2020-06-30
914 次浏览
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