mongodb queries both with AND and OR

Question

can I use combination of OR and AND in mongodb queries?

the code below doesn\'t work as expected

db.things.find({
           $and:[
                {         


        

Answer 1

This is possible in following manner (mongodb 3.4)

Here is the good example

https://docs.mongodb.com/manual/reference/operator/query/and/#and-queries-with-multiple-expressions-specifying-the-same-operator

        db.getCollection('tbl_menu_items').find({
        $and : [
            { $or : [ { price : 0.99 }, { price : 1.99 } ] },
            { $or : [ { sale : true }, { qty : { $lt : 20 } } ] }
        ]
    } )

This query will select all documents where:

the price field value equals 0.99 or 1.99, and the sale field value is equal to true or the qty field value is less than 20.

Here is the example of $and condition with $or query i.e matching any of condition for example

consider following query...

        db.getCollection('tbl_menu_items').find(

        { '$or': 
           [ { '$and': 
                [ { location: { '$in': [ ObjectId("588054c63879f2e767a1d553")  ] } },
                  { is_ryward: 1 },
                  { points_reqiured_to_redeem_reward: { '$lte': 500 } } ] },
             { '$and': 
                [ { location: { '$in': [ ObjectId("588054c63879f2e767a1d553")  ] } },
                  { is_freebie: 1 } ] } ] }
        )

This query will select all documents where:

location array in 588054c63879f2e767a1d553 and is_ryward = 1 and points_reqiured_to_redeem_reward < 500

Or

location array in 588054c63879f2e767a1d553 and is_freebie