.

VizhTalk.Learning.Application/CommandHandlers/LanguageCommandHandler.cs

@@ -16,7 +16,7 @@ public class CreateLanguageCommandHandler(IUnitOfWork unitOfWork) : ICommandHand
     public async Task<LanguageDTO> Handle(CreateLanguageCommand request, CancellationToken cancellationToken)
     {
         var title = request.Title.Trim();
-        if (await unitOfWork.Language.Exists(x => x.Title.Equals(title)))
+        if (await unitOfWork.Language.Exists(x => x.Title == title))
             throw new LanguageTitleAlreadyExistsException();
 
         var language = Language.CreateNew(new LanguageTitle(title));

VizhTalk.Learning.Application/QueryHandlers/LanguageQueryHandler.cs

@@ -1,6 +1,7 @@
 using VizhTalk.BuildingBlocks.Application.Configuration.Query;
 using VizhTalk.BuildingBlocks.Application.Data;
 using VizhTalk.Grpc.Learning.Language;
+using VizhTalk.Learning.Domain.Entities;
 
 namespace VizhTalk.Learning.Application.QueryHandlers;
 
@@ -19,8 +20,10 @@ public class GetLanguageByTitleQueryHandler(IGenericDapper<LanguageDTO> language
 {
     public async Task<LanguageDTO> Handle(GetLanguageByTitleQuery request, CancellationToken cancellationToken)
     {
-        var sql = "select * from Learning.Languages where Title = @title";
-        var language = await languageDapper.GetAsync(sql, request.Title);
+        var sql = $"select * from Learning.Languages where Title = " +
+            $" @{nameof(Language.Title)}";
+
+        var language = await languageDapper.GetAsync(sql, new { request.Title });
         return language;
     }
 }

VizhTalk.Learning.Domain/ValueObjects/LanguageTitle.cs

@@ -11,18 +11,16 @@ namespace VizhTalk.Learning.Domain.ValueObjects
         }
         public LanguageTitle(string title)
         {
+            title = title.Trim();
             Guard.NullOrEmpty(title, nameof(LanguageTitle));
             Guard.MaxLength(title, nameof(LanguageTitle), 60);
 
             Value = title;
         }
         public string Value { get; private set; }
-        public override bool Equals(object? obj)
-        {
-            if (obj is string value)
-                return Value == value;
 
-            return base.Equals(obj);
-        }
+
+        public static implicit operator string(LanguageTitle title) => title.Value;
+
     }
 }

VizhTalk.Learning.Infrastructure/Dapper/GenericDapper.cs

@@ -12,7 +12,7 @@ public class GenericDapper<T> : IGenericDapper<T>
     {
         connection = sqlConnectionFactory.GetOpenConnection();
     }
-    public async Task<T?> GetAsync(string sql, object? param = null)
+    public async Task<T?> GetAsync(string sql,  object? param = null)
     {
         return await connection.QueryFirstOrDefaultAsync<T>(sql, param);
     }