我如何在Node.js中将查询转换为与mongodb一起使用

Question

this is how my mongo query looks like

db.test.findOne({"User.David":{$elemMatch:{"action":"todo","status":"Done"}}})

I'm implementing this in a node.js api where the user can retrieve docs based on username and status

below is what I've tried.

var query = {};
var value = `User.${userName}`;
query[value] = `{$elemMatch:{"action":"todo","status":"${status}"}}`

db.collection(test).findOne(query).then((result)=>{

}

problem with this is the query looks like

db.test.findOne({'User.David':'{$elemMatch:{"action":"todo","status":"Done"}}'})

the quotes are a problem ' ' here.

Answer 1

You shouldn't use a string template around the whole query value expression since that will result in a string. Instead, just construct your query like so:

query[value] = { $elemMatch: { action: "todo", status } }