Dependency Injection and Entities

Question

I have two classes and have one to many relationship as shown below

public class User
{
    public string Name{get;set;}
    public IList<Address> Addresses{get;set}
}

public class Address
{
   public string StreetAddress{get;set;}
   public User User{get;set;}
}

To add address to user I need to initiate Addresses property in User constructor as

public User()
{
   this.Addresses=new List<Address>();

}

Is this scenario good candidate to use DI to initiate List or should I initiate the Address list in constructor as shown.

I doubt it, are you just initialising it to an empty list? If so, what is there to inject here? I'm not sure you quite understand what dependency injection is. — DavidG, Nov 19 '14 at 16:14

score 0 · Accepted Answer · answered Nov 19 '14 at 16:19

0

If the the address data itself is required to construct an instance of User, it may be a candidate for DI. But if's just a matter of making sure the list is instantiated, then your code is correct as-is.

answered Nov 19 '14 at 16:19

Phil Sandler

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score 0 · Answer 2 · answered Dec 11 '19 at 09:31

In this case Dependency Injection would be overkill. Dependency Injection is usually used to initialize complex networks of services. Here you are dealing with a network of data objects that map to the piece of world you are translating into code: a composition between User and Address is therefore sufficient, and you must initialize collections in the constructor.

Dependency Injection and Entities

2 Answers2