KeyTakeAways About MongoDB All Postional Operator ($[])
- The $[] positional operator in MongoDB is used to modify all elements within a specified array field.
- It facilitates updates to arrays that contain embedded documents, allowing for comprehensive updates across arrays with embedded documents.
- You can also use this operator for those queries which traverse more than one array and nested arrays.
- If upsert is set to true, then the query must contain an exact equality match on the array field in order to use $[] operator in the update statement. If upsert operation doesnot include the exact equality match on the array field, then upsert will give an error.
- You can use $[] operator with update(), findAndModify(), etc., methods to modify all the array items for the document or documents that match the specified query condition.
MongoDB All Positional Operator ($[])
MongoDB All Positional Operator allows bulk updates to all elements in an array field that matches the given query condition.