Mongodb match code example

Example 1: $in mongodb

{ field: { $in: [<value1>, <value2>, ... <valueN> ] } }

Example 2: mongodb array field contains

db.inventory.find( { tags: { $all: ["red", "blank"] } } )

Example 3: find string element in an array mongodb

db.articles.find({
    "stock.country" : "01",
    "stock.warehouse.code" : "02"
}).pretty();