How do you create a relationship between a user and the objects they have added?
I am building a gas tracking application, and I have a vehicle object which contains multiple mpg objects, and I want to make it so that every user can have their own vehicles with their own gas mileage data. What is the best way to approach this being that a user can have multiple vehicles and the vehicles can have multiple mpgs? I have attached my data models as they are currently. Thank you for any help.