feat: Fixed errors

LctMonolith/Database/Repositories/GenericRepository.cs

@@ -0,0 +1,56 @@
+using System.Linq.Expressions;
+using LctMonolith.Database.Data;
+using Microsoft.EntityFrameworkCore;
+
+namespace LctMonolith.Database.Repositories;
+
+/// <summary>
+/// Generic repository implementation for common CRUD and query composition.
+/// </summary>
+public class GenericRepository<TEntity> : IGenericRepository<TEntity> where TEntity : class
+{
+    protected readonly AppDbContext Context;
+    protected readonly DbSet<TEntity> Set;
+
+    public GenericRepository(AppDbContext context)
+    {
+        Context = context;
+        Set = context.Set<TEntity>();
+    }
+
+    public IQueryable<TEntity> Query(
+        Expression<Func<TEntity, bool>>? filter = null,
+        Func<IQueryable<TEntity>, IOrderedQueryable<TEntity>>? orderBy = null,
+        params Expression<Func<TEntity, object>>[] includes)
+    {
+        IQueryable<TEntity> query = Set;
+        if (filter != null) query = query.Where(filter);
+        if (includes != null)
+        {
+            foreach (var include in includes)
+                query = query.Include(include);
+        }
+        if (orderBy != null) query = orderBy(query);
+        return query;
+    }
+
+    public async Task<TEntity?> GetByIdAsync(object id) => await Set.FindAsync(id) ?? null;
+
+    public ValueTask<TEntity?> FindAsync(params object[] keyValues) => Set.FindAsync(keyValues);
+
+    public async Task AddAsync(TEntity entity, CancellationToken ct = default) => await Set.AddAsync(entity, ct);
+
+    public async Task AddRangeAsync(IEnumerable<TEntity> entities, CancellationToken ct = default) => await Set.AddRangeAsync(entities, ct);
+
+    public void Update(TEntity entity) => Set.Update(entity);
+
+    public void Remove(TEntity entity) => Set.Remove(entity);
+
+    public async Task RemoveByIdAsync(object id, CancellationToken ct = default)
+    {
+        var entity = await Set.FindAsync([id], ct);
+        if (entity == null) throw new KeyNotFoundException($"Entity {typeof(TEntity).Name} id={id} not found");
+        Set.Remove(entity);
+    }
+}
+

LctMonolith/Database/Repositories/IGenericRepository.cs

@@ -0,0 +1,25 @@
+using System.Linq.Expressions;
+
+namespace LctMonolith.Database.Repositories;
+
+/// <summary>
+/// Generic repository abstraction for aggregate root / entity access. Read operations return IQueryable for composition.
+/// </summary>
+public interface IGenericRepository<TEntity> where TEntity : class
+{
+    IQueryable<TEntity> Query(
+        Expression<Func<TEntity, bool>>? filter = null,
+        Func<IQueryable<TEntity>, IOrderedQueryable<TEntity>>? orderBy = null,
+        params Expression<Func<TEntity, object>>[] includes);
+
+    Task<TEntity?> GetByIdAsync(object id);
+    ValueTask<TEntity?> FindAsync(params object[] keyValues);
+
+    Task AddAsync(TEntity entity, CancellationToken ct = default);
+    Task AddRangeAsync(IEnumerable<TEntity> entities, CancellationToken ct = default);
+
+    void Update(TEntity entity);
+    void Remove(TEntity entity);
+    Task RemoveByIdAsync(object id, CancellationToken ct = default);
+}
+