How to model this correctly in Entity Framework? - asp.net-core

Question

I have a requirement that I am not sure how to accomplish, in my existing data I have a list of customers, each customer should be assigned a staffMember to work with them, so would this be a 1 to 1 relationship or a 1 to many relationship, having trouble wrapping my head around how to model the data, as I want to figure out how to model this correctly. Since a staff member can be assigned to many different customers How should I model this? Does this look correct?
What I would like is to have the form pull the list of staff members available from the staff table, when inputting a new customer, ideally by the name
which I figure I could probably do using linq..
public class Customer
{
public int CustomerId { get; set; }
public string Name { get; set; }
public string BusinessName { get; set; }
public string Phone { get; set; }
public string Email { get; set; }
public DateTime RequestDate { get; set; }
public Staff Staff { get; set; }
public List<CustomerJob> CustomerJobs { get; set; }
}
public class Staff
{
public int ID { get; set; }
public string Name { get; set; }
public string Phone { get; set; }
public string EMail { get; set; }
public int CustomerId { get; set; }
}

Answer 1

Customer have exactly 1 Staff while a single Staff maybe assigned to more than 1 Customer. So this is a one-to-many relation.
It is better that Customer be aware of its Staff. It could be called AssignedStaff. Staff itslef does not need to have a property to show all its Csutomers. Tough you can extract Customer list of a Staff using a simple query.
My recommended class structure is as follow:
public class Customer
{
[Key]
public int Id { get; set; }
public string Name { get; set; }
public string BusinessName { get; set; }
public string Phone { get; set; }
public string Email { get; set; }
public DateTime RequestDate { get; set; }
public Staff AssignedStaff { get; set; }
public List<CustomerJob> CustomerJobs { get; set; }
}
public class Staff
{
[Key]
public int Id { get; set; }
public string Name { get; set; }
public string Phone { get; set; }
public string EMail { get; set; }
}
A query for extracting Customer list of a Staff:
var customers = _dbContext.Customers.Where(x => x.AssignedStaff.Id == staffId);