Mongodb查询从多个键中选择记录

Question

让数据库中的记录为

{"_id":"1","unit":"a1", "vehicle1" : "car"}
{"_id":"2","unit":"a2", "vehicle1" : "truck", "vehicle2" : "bike"}
{"_id":"3","unit":"b1", "vehicle1" : "car"}
{"_id":"4","unit":"zz", "vehicle1" : "truck", "vehicle2" : "car", "vehicle3" : "car" }

是否有一个命令可以找到具有以下参数的条目或所有条目:

db.accidents.find( { vehicle*: "bike" } );

Answer 1

取而代之的是一个车辆数组。

这是您可以插入的示例 JSON

{"_id":"2", "unit":"a2", "vehicle": ["truck", "bike"]}

你可以查询的方式是:

db.accidents.find({"vehicle":"bike"});