update an array element with an array in mongoose
db.inventory.updateOne( { _id: 2 }, { $addToSet: { tags: { $each: [ "camera", "electronics", "accessories" ] } } } )
Source: www.mongodb.com
db.inventory.updateOne( { _id: 2 }, { $addToSet: { tags: { $each: [ "camera", "electronics", "accessories" ] } } } )