我的收藏名称是employee,我的收藏如下
{
"Title":"IssueFixingTeam",
"TeamLead":"Mr.Bean",
"workers":["xxx","yyy","zzz"]
},
{
"Title":"DevelopmentTeam",
"TeamLead":"Mr.John Doe",
"workers":["aa","dd","ss"]
}
如何查询查找,TeamLead“憨 bean 先生”下有多少 worker 提前致谢
最佳答案
如果您只对属于“Mr.Bean”的一条记录感兴趣(否则,请参阅@felix 的回答),那么这可以为您提供所需的计数:
db.employee.findOne({'TeamLead': 'Mr.Bean'}).workers.length
关于mongodb - 如何在Mongodb中单独查询数组中的项目,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/42765438/