MongoDB jsonSchema validation additionalProperties

Question

Create Collection with validator

db.createCollection(\"claims\", 
    { validator : { $jsonSchema : { bsonType : \"object\", 
                       


        

Answer 1

As at MongoDB 3.6.2, JSON Schema validation does not automatically add the default _id property, so you need to include a rule for this when using additionalProperties: false.

For example, assuming the default ObjectID:

db.createCollection("claims",
    { validator : {
        $jsonSchema : {
            bsonType : "object",
            properties : {
                _id: { bsonType: "objectId" },
                airportCode : { bsonType: "string"}
            },
            additionalProperties: false
        }
     }}
)

Two related issues to upvote/watch on the MongoDB Jira issue tracker:

• SERVER-32160: provide warning when _id is not in list of properties and additionalProperties is false
• SERVER-20547: Expose the reason an operation fails document validation