Timo Martinson Posts - Answer Overflow

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CC#

•Created by Timo Martinson on 3/3/2024 in #help

Annotate Props for Entity Framework

Which annotations do exist and how do I import them? I especially need UNIQUE contraints for the columns: [slug, id]

47 replies

CC#

•Created by Timo Martinson on 3/1/2024 in #help

Breaking a cycle (Post > Blog > Post > Blog > ...)

Hey fellows! I stumbled into a cycle and don't know how to break it. It occurs between posts and blogs. This is the controller action:

[HttpPost("/blog/{blogSlug}/post")]
    public async Task<Post> CreatePost([FromBody] PostInput postInput, [FromRoute] string blogSlug)
    {
        User user = await _dataContext.Users.FirstAsync((u) => u.Slug == "timo");
        Blog blog = await _dataContext.Blogs.FirstAsync((b) => b.Slug == blogSlug);
        Post newPost = PostMapper.ToPost(postInput, user: user, blog: blog);
        _dataContext.Posts.Add(newPost);
        await _dataContext.SaveChangesAsync();

        return newPost;
    }

[HttpPost("/blog/{blogSlug}/post")]
    public async Task<Post> CreatePost([FromBody] PostInput postInput, [FromRoute] string blogSlug)
    {
        User user = await _dataContext.Users.FirstAsync((u) => u.Slug == "timo");
        Blog blog = await _dataContext.Blogs.FirstAsync((b) => b.Slug == blogSlug);
        Post newPost = PostMapper.ToPost(postInput, user: user, blog: blog);
        _dataContext.Posts.Add(newPost);
        await _dataContext.SaveChangesAsync();

        return newPost;
    }

How to break the cycle? Thanks.

47 replies

CC#

•Created by Timo Martinson on 3/1/2024 in #help

Warning: NULL literal or a possible NULL value is being converted to a non-nullable type.

Ladies and gentlemen, I am confronted with a new type of warning, that I would like to understand. What should I do? This is the code:

    [HttpGet("/{userSlug}")]
    public async Task<User> ShowUser(string userSlug)
    {
        User user = await _dataContext.Users.FirstOrDefaultAsync((u) => u.Slug == userSlug);

        return user;
    }

    [HttpGet("/{userSlug}")]
    public async Task<User> ShowUser(string userSlug)
    {
        User user = await _dataContext.Users.FirstOrDefaultAsync((u) => u.Slug == userSlug);

        return user;
    }

This is the message: NULL literal or a possible NULL value is being converted to a non-nullable type

8 replies

CC#

•Created by Timo Martinson on 3/1/2024 in #help

Preparing Models for an API (How to setup relationships)

Hey fellows! I wonder how to set the properties for related models ... Here is my model:

public class Comment(string name, string content)
{
    public Guid Id { get; set; } = Guid.NewGuid();

    public string Name { get; set; } = name;
    public string Content { get; set; } = content;

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

    public User? User { get; set; }
    public Post? Post { get; set; }
}

public class Comment(string name, string content)
{
    public Guid Id { get; set; } = Guid.NewGuid();

    public string Name { get; set; } = name;
    public string Content { get; set; } = content;

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

    public User? User { get; set; }
    public Post? Post { get; set; }
}

Thank you for your help.

190 replies

CC#

•Created by Timo Martinson on 11/24/2023 in #help

how to split code to multiple files in minimal api?

How to do that?

5 replies

CC#

•Created by Timo Martinson on 9/27/2023 in #help

❔ Make Entity Framework Property Unique

namespace Textopia.Models;

public class Blog(string slug, string? name = null, string? description = null)
{
    public Guid Id { get; set; } = Guid.NewGuid();

    public string Slug { get; set; } = slug;
    public string? Name { get; set; } = name;
    public string? Description { get; set; } = description;

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

    public ICollection<User>? Users { get; set; }
    public ICollection<Post>? Posts { get; set; }
}

namespace Textopia.Models;

public class Blog(string slug, string? name = null, string? description = null)
{
    public Guid Id { get; set; } = Guid.NewGuid();

    public string Slug { get; set; } = slug;
    public string? Name { get; set; } = name;
    public string? Description { get; set; } = description;

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

    public ICollection<User>? Users { get; set; }
    public ICollection<Post>? Posts { get; set; }
}

How can I make slugs unique!?

12 replies

CC#

•Created by Timo Martinson on 9/27/2023 in #help

❔ 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. 😉

17 replies

CC#

•Created by Timo Martinson on 8/31/2023 in #help

❔ Setting up a One-To-Many-Relationship in EntityFramework Core

namespace GetOut.Models;

public class Provider(string slug, string name, string? description)
{
    public Guid Id { get; set; } = Guid.NewGuid();

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

    public string Slug { get; set; } = slug;
    public string Name { get; set; } = name;
    public string? Description { get; set; } = description;
    
    public bool Verified { get; set; } = false;

    public City City { get; set; }
    public ICollection<Event>? Events { get; set; }
}

namespace GetOut.Models;

public class Provider(string slug, string name, string? description)
{
    public Guid Id { get; set; } = Guid.NewGuid();

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

    public string Slug { get; set; } = slug;
    public string Name { get; set; } = name;
    public string? Description { get; set; } = description;
    
    public bool Verified { get; set; } = false;

    public City City { get; set; }
    public ICollection<Event>? Events { get; set; }
}

I want to establish a relation between Providers and City. 😉 Thanks.

15 replies

CC#

•Created by Timo Martinson on 8/30/2023 in #help

❔ How to bring in DbContext?

app.MapPost("/cities", async ([FromBody] City city) => {
    ...
});

app.MapPost("/cities", async ([FromBody] City city) => {
    ...
});

21 replies

CC#

•Created by Timo Martinson on 8/29/2023 in #help

❔ how to get city data from request body?

app.MapPost("/cities", async (DataContext dataContext) => {
    dataContext.Cities.Add(city);
    await dataContext.SaveChangesAsync();
    return Results.Created();
});

app.MapPost("/cities", async (DataContext dataContext) => {
    dataContext.Cities.Add(city);
    await dataContext.SaveChangesAsync();
    return Results.Created();
});

10 replies

CC#

•Created by Timo Martinson on 8/4/2023 in #help

❔ Initializing a relation in Entity Framework Core?

public class Post : Model
{
    public string Slug { get; set; }
    public string? Name { get; set; }
    public string? Content { get; set; }
    public bool Draft { get; set; } = true;
    public DateTime PublishedAt { get; set; } = DateTime.Now;

    public User User { get; set; }
    public Blog Blog { get; set; }
    public ICollection<Comment>? Comments { get; set; }
    public ICollection<Label>? Labels { get; set; }

    public Post(string slug, string? name, string? content) : base()
    {
        Slug = slug;
        Name = name;
        Content = content;
    }
}

public class Post : Model
{
    public string Slug { get; set; }
    public string? Name { get; set; }
    public string? Content { get; set; }
    public bool Draft { get; set; } = true;
    public DateTime PublishedAt { get; set; } = DateTime.Now;

    public User User { get; set; }
    public Blog Blog { get; set; }
    public ICollection<Comment>? Comments { get; set; }
    public ICollection<Label>? Labels { get; set; }

    public Post(string slug, string? name, string? content) : base()
    {
        Slug = slug;
        Name = name;
        Content = content;
    }
}

How can I initialize User and Blog with EntityFrameworkCore?

17 replies

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