$each array monoose code example

Example 1: add in to array mongoose

// With { $push: { field: element } }

// Example:
const elementToPush = { a: 1, b: 2 };
const body = { $push: { arrayField: elementToPush } };
model.patch(id, body);

Example 2: how to spread an array in mongodb

db.inventory.update(
   { _id: 2 },
   { $addToSet: { tags: { $each: [ "camera", "electronics", "accessories" ] } } }
 )