C#•15mo ago

❔ Initializing Entity Relationship Properties

namespace Textopia.Models;

public class Post(string slug)
{
    public Guid Id { get; set; } = Guid.NewGuid();

    public string Slug { get; set; } = slug;
    public string? Name { get; set; }
    public string? Content { get; set; }

    public DateTime CreatedAt { get; set; } = DateTime.Now;
    public DateTime UpdatedAt { get; set; } = DateTime.Now;
    public DateTime? DeletedAt { get; set; }

    public User User { get; set; }
    public Blog Blog { get; set; }
}

namespace Textopia.Models;

public class Post(string slug)
{
    public Guid Id { get; set; } = Guid.NewGuid();

    public string Slug { get; set; } = slug;
    public string? Name { get; set; }
    public string? Content { get; set; }

    public DateTime CreatedAt { get; set; } = DateTime.Now;
    public DateTime UpdatedAt { get; set; } = DateTime.Now;
    public DateTime? DeletedAt { get; set; }

    public User User { get; set; }
    public Blog Blog { get; set; }
}

How to initialize User and Blog property? Thaaaaaaaanks. 😉

6 Replies

Angius•15mo ago

Make those properties required and don't initialize them

Timo MartinsonOP•15mo ago

cool what does this lead to ? and where should I put it ?

public required User User { get; set; }
public required Blog Blog { get; set; }

public required User User { get; set; }
public required Blog Blog { get; set; }

is that fine?

Angius•15mo ago

ye It won't allow you to initialize this object without those properties

MODiX•15mo ago

Angius

REPL Result: Failure

class Foo {
    public int Bar { get; set; }
    public required int Baz { get; set; }
}

new Foo {
    Bar = 69,
    // no Baz
}

class Foo {
    public int Bar { get; set; }
    public required int Baz { get; set; }
}

new Foo {
    Bar = 69,
    // no Baz
}

Exception: CompilationErrorException

- Required member 'Foo.Baz' must be set in the object initializer or attribute constructor.

- Required member 'Foo.Baz' must be set in the object initializer or attribute constructor.

Compile: 464.230ms | Execution: 0.000ms | React with ❌ to remove this embed.

Timo MartinsonOP•15mo ago

ok buuuuuuut: ... The required member "Post.User" must be set in the object initializer or attribute constructor. !?!!??! when I try to set it in

app.MapPost("/blogs/{blogSlug}/posts", (string blogSlug) => {
    Post post = new(slug: "timo");
});

app.MapPost("/blogs/{blogSlug}/posts", (string blogSlug) => {
    Post post = new(slug: "timo");
});

naaa? ok, I finally figured it out! 😉 Thank you nevertheless!

Accord•15mo ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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❔ Initializing Entity Relationship Properties