我的MongoDBCollection 中有一个嵌套很深的Collection .
当我运行以下查询时:
db.countries.findOne({},{'data.country.neighbor.name':1,'_id':0})
我在这里得到了一个嵌套的结果:
{"data" : {
"country" : [
{
"neighbor" : [
{
"name" : "Austria"
},
{
"name" : "Switzerland"
}
]
},
{
"neighbor" : {
"name" : "Malaysia"
}
},
{
"neighbor" : [
{
"name" : "Costa Rica"
},
{
"name" : "Colombia"
}
]
}
]
}}
这就是我想要的:
['Austria', 'Switzerland', 'Malaysia', 'Costa Rica', 'Colombia']
或者这个:
{'name':['Austria', 'Switzerland', 'Malaysia', 'Costa Rica', 'Colombia']}
或者其他类似的东西...这可能吗?