db.students.batchInsert is not a function :@(shell):1:1

Posted 2020-10-25 雪山上的蒲公英

按照《mongdb权威指南》当使用version 3.4.1版本的mongodb，其中使用batchInsert函数进行对students集合进行批量插入  

db.students.batchInsert([{"classid" : 1, "age" : 20, "name" : "kobe"},  
{"classid" : 1, "age" : 23, "name" : "nash"}, 
{"classid" : 2, "age" : 18, "name" : "james"},  
{"classid" : 2, "age" : 19, "name" : "wade"},  
{"classid" : 2, "age" : 19, "name" : "bosh"},  
{"classid" : 2, "age" : 25, "name" : "allen"},  
{"classid" : 1, "age" : 19, "name" : "howard"},  
{"classid" : 1, "age" : 22, "name" : "paul" },  
{"classid" : 2, "age" : 24, "name" : "shane"}]);  

插入失败，报如下错误：

2018-02-26T21:08:40.382+0800 E QUERY [main] TypeError: db.students.batchInsert is not a function :@(shell):1:1

原因：书中示例batchInsert是按照version：2.4.0运行的，到本版本已经废弃该方法

解决方法：直接使用insert实现对students集合批量插入

db.students.insert([{"classid" : 1, "age" : 20, "name" : "kobe"},  
{"classid" : 1, "age" : 23, "name" : "nash"}, 
{"classid" : 2, "age" : 18, "name" : "james"},  
{"classid" : 2, "age" : 19, "name" : "wade"},  
{"classid" : 2, "age" : 19, "name" : "bosh"},  
{"classid" : 2, "age" : 25, "name" : "allen"},  
{"classid" : 1, "age" : 19, "name" : "howard"},  
{"classid" : 1, "age" : 22, "name" : "paul" },  
{"classid" : 2, "age" : 24, "name" : "shane"}]);  

db.students.find()

控制台输出如下，插入成功

// Command #1:
// Execution time: 0.0s
// Result:
BulkWriteResult({
    "writeErrors" : [ ],
    "writeConcernErrors" : [ ],
    "nInserted" : 9,
    "nUpserted" : 0,
    "nMatched" : 0,
    "nModified" : 0,
    "nRemoved" : 0,
    "upserted" : [ ]
})


// Command #2:
// db.students.find()
// Execution time: 0.0s
// Result:
{ "_id" : ObjectId("5a940a3f379afc334959cacc"), "classid" : 1, "age" : 20, "name" : "kobe" }
{ "_id" : ObjectId("5a940a3f379afc334959cacd"), "classid" : 1, "age" : 23, "name" : "nash" }
{ "_id" : ObjectId("5a940a3f379afc334959cace"), "classid" : 2, "age" : 18, "name" : "james" }
{ "_id" : ObjectId("5a940a3f379afc334959cacf"), "classid" : 2, "age" : 19, "name" : "wade" }
{ "_id" : ObjectId("5a940a3f379afc334959cad0"), "classid" : 2, "age" : 19, "name" : "bosh" }
{ "_id" : ObjectId("5a940a3f379afc334959cad1"), "classid" : 2, "age" : 25, "name" : "allen" }
{ "_id" : ObjectId("5a940a3f379afc334959cad2"), "classid" : 1, "age" : 19, "name" : "howard" }
{ "_id" : ObjectId("5a940a3f379afc334959cad3"), "classid" : 1, "age" : 22, "name" : "paul" }
{ "_id" : ObjectId("5a940a3f379afc334959cad4"), "classid" : 2, "age" : 24, "name" : "shane" }