text: db.createCollection("m_souvenir", {
     validator: {
        $jsonSchema: {
           bsonType: "object",
           required: [ "code", "name"],
           properties: {
              code: {
                 bsonType: "string",
                 description: "must be a string and is required"
              },
              name: {
                 bsonType: "string",
                 description: "must be a string and is required"
              },
              description: {
                 bsonType: "string",
                 description: "must be a string and is not required"
              }
           }
        }
     }
  });