Aokiri 🐸 Posts - Answer Overflow

Aokiri 🐸

•Created by Aokiri 🐸 on 11/25/2023 in #help

Difference between await & GetAwaiter()/GetResult()

I'm actually doing a simple task that checks if a role exists in the database and create it if the role doesn't exists. Code:

if (!_roleManager.RoleExistsAsync(SD.Role_Customer).GetAwaiter().GetResult())
  {
    _roleManager.CreateAsync(new IdentityRole(SD.Role_User)).GetAwaiter().GetResult();
    _roleManager.CreateAsync(new IdentityRole(SD.Role_Moderator)).GetAwaiter().GetResult();
    _roleManager.CreateAsync(new IdentityRole(SD.Role_Admin)).GetAwaiter().GetResult();
    _roleManager.CreateAsync(new IdentityRole(SD.Role_Invited)).GetAwaiter().GetResult();
  }

if (!_roleManager.RoleExistsAsync(SD.Role_Customer).GetAwaiter().GetResult())
  {
    _roleManager.CreateAsync(new IdentityRole(SD.Role_User)).GetAwaiter().GetResult();
    _roleManager.CreateAsync(new IdentityRole(SD.Role_Moderator)).GetAwaiter().GetResult();
    _roleManager.CreateAsync(new IdentityRole(SD.Role_Admin)).GetAwaiter().GetResult();
    _roleManager.CreateAsync(new IdentityRole(SD.Role_Invited)).GetAwaiter().GetResult();
  }

Here's how it looks like with await:

if (!await _roleManager.RoleExistsAsync(SD.Role_Customer).GetAwaiter().GetResult())
  {
    await _roleManager.CreateAsync(new IdentityRole(SD.Role_User));
    await _roleManager.CreateAsync(new IdentityRole(SD.Role_Moderator));
    await _roleManager.CreateAsync(new IdentityRole(SD.Role_Admin));
    await _roleManager.CreateAsync(new IdentityRole(SD.Role_Invited));
  }

if (!await _roleManager.RoleExistsAsync(SD.Role_Customer).GetAwaiter().GetResult())
  {
    await _roleManager.CreateAsync(new IdentityRole(SD.Role_User));
    await _roleManager.CreateAsync(new IdentityRole(SD.Role_Moderator));
    await _roleManager.CreateAsync(new IdentityRole(SD.Role_Admin));
    await _roleManager.CreateAsync(new IdentityRole(SD.Role_Invited));
  }

10 replies

CC#

•Created by Aokiri 🐸 on 10/13/2023 in #help

Confusion about Repository Pattern and Unit of Work.

Hi there. I recently applied the Repository Pattern and Unit of Work in an API I'm creating, and everything was going well. However, I got stuck trying to understand how to pass the Database Context to the implementation of one of my interfaces. I'm trying to grasp it, but I can't figure it out. I'll attach few code for reference: (Program.cs) Here is where I'll apply Dependency Injection for my ICategoryRepository with a Scoped lifetime:

builder.Services.AddScoped<ICategoryRepository, CategoryRepository>();

builder.Services.AddScoped<ICategoryRepository, CategoryRepository>();

(DataAccess/Repository/Repository.cs) Here is my implementation of my Repository Interface (only constructor and fields):

    public class Repository<T> : IRepository<T> where T : class
    {
        private readonly ApplicationDbContext _db;
        internal DbSet<T> dbSet;

        public Repository(ApplicationDbContext db)
        {
            _db = db;
            this.dbSet = _db.Set<T>();
            // For example, _db.Categories == dbSet
        }

    public class Repository<T> : IRepository<T> where T : class
    {
        private readonly ApplicationDbContext _db;
        internal DbSet<T> dbSet;

        public Repository(ApplicationDbContext db)
        {
            _db = db;
            this.dbSet = _db.Set<T>();
            // For example, _db.Categories == dbSet
        }

(DataAccess/Repository/CategoryRepository.cs) And here is my implementation of my Category Repository Interface (only constructor, as always):

    public class CategoryRepository : Repository<Category>, ICategoryRepository
    {
        private readonly ApplicationDbContext _db;

        public CategoryRepository(ApplicationDbContext db) : base(db)
        {
            _db = db;
        }

    public class CategoryRepository : Repository<Category>, ICategoryRepository
    {
        private readonly ApplicationDbContext _db;

        public CategoryRepository(ApplicationDbContext db) : base(db)
        {
            _db = db;
        }

Look how these two has inyected with the DbContext, but here comes my confusion... In the controller, I created an ICategoryRepository object, but I don't understand how it pass the DbContext to the controller itself...

19 replies

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