deletions update

SurveyLib.Core/Repositories/IAnswerRepository.cs

@@ -4,5 +4,5 @@ namespace SurveyLib.Core.Repositories;
 
 public interface IAnswerRepository : IGenericRepository<Answer>
 {
-    
+    Task DeleteAsync(int questionId, int completionId);
 }

SurveyLib.Core/Repositories/IGenericRepository.cs

@@ -8,5 +8,5 @@ public interface IGenericRepository<T> where T : class
     Task<IEnumerable<T>> GetAllAsync();
     Task AddAsync(T entity);
     Task UpdateAsync(T entity);
-    Task DeleteAsync(T entity);
+    Task DeleteAsync(int id);
 }

SurveyLib.Infrastructure.EFCore/Data/SurveyDbContext.cs

@@ -7,12 +7,14 @@ namespace SurveyLib.Infrastructure.EFCore.Data;
 public class SurveyDbContext : DbContext
 {
     public DbSet<Survey> Surveys { get; set; }
-    
+
     public DbSet<QuestionBase> Questions { get; set; }
     public DbSet<SingleAnswerQuestion> SingleAnswerQuestions { get; set; }
     public DbSet<MultipleAnswerQuestion> MultipleAnswerQuestions { get; set; }
     public DbSet<TextQuestion> TextQuestions { get; set; }
-    
+
+    public DbSet<AnswerVariant> AnswerVariants { get; set; }
+
     public DbSet<Completion> Completions { get; set; }
     public DbSet<Answer> Answers { get; set; }
 

SurveyLib.Infrastructure.EFCore/Repositories/AnswerRepository.cs

@@ -36,9 +36,15 @@ public class AnswerRepository : IAnswerRepository
         await _context.SaveChangesAsync();
     }
 
-    public async Task DeleteAsync(Answer entity)
+    public async Task DeleteAsync(int id)
     {
-        _context.Answers.Remove(entity);
+        throw new NotImplementedException();
+    }
+
+    public async Task DeleteAsync(int questionId, int completionId)
+    {
+        await _context.Answers.Where(a => a.QuestionId == questionId && a.CompletionId == completionId)
+            .ExecuteDeleteAsync();
         await _context.SaveChangesAsync();
     }
 }

SurveyLib.Infrastructure.EFCore/Repositories/AnswerVariantsRepository.cs

@@ -0,0 +1,49 @@
+using Microsoft.EntityFrameworkCore;
+using SurveyLib.Core.Models;
+using SurveyLib.Core.Repositories;
+using SurveyLib.Infrastructure.EFCore.Data;
+
+namespace SurveyLib.Infrastructure.EFCore.Repositories;
+
+public class AnswerVariantsRepository : IAnswerVariantsRepository
+{
+    private readonly SurveyDbContext _context;
+
+    public AnswerVariantsRepository(SurveyDbContext context)
+    {
+        _context = context;
+    }
+
+    public async Task<AnswerVariant?> GetByIdAsync(int id)
+    {
+        return await _context.AnswerVariants.FindAsync(id);
+    }
+
+    public async Task<IEnumerable<AnswerVariant>> GetAllAsync()
+    {
+        return await _context.AnswerVariants.ToListAsync();
+    }
+
+    public async Task AddAsync(AnswerVariant entity)
+    {
+        await _context.AnswerVariants.AddAsync(entity);
+        await _context.SaveChangesAsync();
+    }
+
+    public async Task UpdateAsync(AnswerVariant entity)
+    {
+        _context.AnswerVariants.Update(entity);
+        await _context.SaveChangesAsync();
+    }
+
+    public async Task DeleteAsync(int id)
+    {
+        await _context.AnswerVariants.Where(av => av.Id == id).ExecuteDeleteAsync();
+        await _context.SaveChangesAsync();
+    }
+
+    public async Task<IEnumerable<AnswerVariant>> GetAnswerVariantsByQuestionIdAsync(int questionId)
+    {
+        return await _context.AnswerVariants.Where(av => av.QuestionId == questionId).ToListAsync();
+    }
+}

SurveyLib.Infrastructure.EFCore/Repositories/CompletionRepository.cs

@@ -36,9 +36,9 @@ public class CompletionRepository : ICompletionRepository
         await _context.SaveChangesAsync();
     }
 
-    public async Task DeleteAsync(Completion entity)
+    public async Task DeleteAsync(int id)
     {
-        _context.Completions.Remove(entity);
+        await _context.Completions.Where(c => c.Id == id).ExecuteDeleteAsync();
         await _context.SaveChangesAsync();
     }
 }

SurveyLib.Infrastructure.EFCore/Repositories/QuestionRepository.cs

@@ -36,9 +36,9 @@ public class QuestionRepository : IQuestionRepository
         await _context.SaveChangesAsync();
     }
 
-    public async Task DeleteAsync(QuestionBase entity)
+    public async Task DeleteAsync(int id)
     {
-        _context.Questions.Remove(entity);
+        await _context.Questions.Where(q => q.Id == id).ExecuteDeleteAsync();
         await _context.SaveChangesAsync();
     }
 

SurveyLib.Infrastructure.EFCore/Repositories/SurveyRepository.cs

@@ -36,9 +36,9 @@ public class SurveyRepository : ISurveyRepository
         await _context.SaveChangesAsync();
     }
 
-    public async Task DeleteAsync(Survey entity)
+    public async Task DeleteAsync(int id)
     {
-        _context.Surveys.Remove(entity);
+        await _context.Surveys.Where(s => s.Id == id).ExecuteDeleteAsync();
         await _context.SaveChangesAsync();
     }
 

SurveyLib.Services/Services/QuestionService.cs

@@ -25,9 +25,7 @@ public class QuestionService : IQuestionService
 
     public async Task DeleteQuestionAsync(int id)
     {
-        var question = await GetQuestionByIdAsync(id);
-
-        await _questionRepository.DeleteAsync(question);
+        await _questionRepository.DeleteAsync(id);
     }
 
     public async Task<QuestionBase> GetQuestionByIdAsync(int id)

SurveyLib.Services/Services/SurveyService.cs

@@ -25,13 +25,7 @@ public class SurveyService : ISurveyService
 
     public async Task DeleteSurveyAsync(int id)
     {
-        var survey = await _surveyRepository.GetByIdAsync(id);
-        if (survey == null)
-        {
-            throw new NullReferenceException($"Survey with id: {id} was not found");
-        }
-
-        await _surveyRepository.DeleteAsync(survey);
+        await _surveyRepository.DeleteAsync(id);
     }
 
     public async Task<IEnumerable<Survey>> GetSurveysAsync()