fix

Tsi1.Api/Tsi1.BusinessLayer/Helpers/ErrorMessages.cs

@@ -59,5 +59,6 @@ namespace Tsi1.BusinessLayer.Helpers
         public const string SurveyIsNull = "La encuesta es nula";
         public const string SurveyHasNoQuestions = "La encuesta no tiene preguntas";
         public const string InvalidSurvey = "La encuesta no pertenece a la facultad con id '{0}'";
+        public const string SurveyResponseAlreadyExist = "El usuario '{0}' ya completo la encuesta '{1}'";
     }
 }

Tsi1.Api/Tsi1.BusinessLayer/Services/SurveyService.cs

@@ -154,14 +154,15 @@ namespace Tsi1.BusinessLayer.Services
 
             if (existingSurveyResponse != null)
             {
-                _mapper.Map(surveyResponse, existingSurveyResponse);
-            }
-            else
-            {
-                var newSurveyResponse = _mapper.Map<SurveyResponse>(surveyResponse);
-                _context.Add(newSurveyResponse);
+                result.HasError = true;
+                result.AddMessage(string.Format(ErrorMessages.SurveyResponseAlreadyExist, surveyResponse.UserId, surveyResponse.SurveyId));
+                return result;
             }
 
+            var newSurveyResponse = _mapper.Map<SurveyResponse>(surveyResponse);
+            _context.Add(newSurveyResponse);
+            
+
             await _context.SaveChangesAsync();
 
             return result;
@@ -172,7 +173,6 @@ namespace Tsi1.BusinessLayer.Services
             var result = new ServiceResult<List<SurveyResponseDetailDto>>();
 
             var tenant = await _context.Tenants.FirstOrDefaultAsync(x => x.Id == tenantId);
-            var tenantAdmin = await _context.Tenants.FirstOrDefaultAsync(x => x.Name == TenantAdmin.Name);
 
             if (tenant == null)
             {