Mongodb - will $addToSet create the field?

Question

Will an array update using $addToSet create the field if it doesn't exist? In other words, if `field2` in the line below does not exist, will it be created by this command: ``` db.collection.update({id: }, {: {$addToSet: }}) ```

Accepted Answer

Yes, it will create. But the proper syntax is: ``` db.collection.update({id: }, {$addToSet: {: }}) ```

Mongodb - will $addToSet create the field?

Solution

Problem