1。查看数据库show dbs
,,,,,“pincode": 123456,
,,,,,“city":“洛Angeles",
,,,,,“state":“California"
}, {
“building":“23,印第安纳州Apt",
,,,,,“pincode": 123457,
,,,,,“city":“洛Angeles2",
,,,,,“state":“California2"
},
])
“contact":“987654321”,
“address_ids": [
ObjectId (“5 bd27e95abb45c7371f36ed3"),
ObjectId (“5 bd27e95abb45c7371f36ed4")
]
})
的var地址=db.address.find ({“_id": {“in"美元:结果[“address_ids"]}})
地址[0]
地址[1]
