If I have a collection of documents, can I use the schema to add a field to all the documents in that collection at once?
Thanks.
Hey @Sarah_39095
Short answer no. And more can be found here
There really is no schema to update in mongodb. It has a flexible data model which will allow you to add any field of any type to a document. There are no restrictions with the model(“schema”).
Therefore if you wanted to add a new field, value pair to each document in a collection, you would run an db.collection.updateMany({}, {fieldToUpdate: newValue, ...})
To Add from the docs:
In practice, however, the documents in a collection share a similar structure
And you could look at Schema Validations.
Welcome and best of luck in the rest of the course(s)! 
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