fix campaign rules

internal/mappers/campaign_mapper.go

@@ -68,14 +68,6 @@ func ToCampaignEntity(request *contract.CreateCampaignRequest) *entities.Campaig
 		return nil
 	}
 
-	var rules []entities.CampaignRule
-	if request.Rules != nil {
-		for _, rule := range request.Rules {
-			// For create request, we'll use a temporary UUID that will be set by the repository
-			rules = append(rules, *ToCampaignRuleEntity(&rule, uuid.Nil))
-		}
-	}
-
 	return &entities.Campaign{
 		Name:        request.Name,
 		Description: request.Description,
@@ -86,7 +78,7 @@ func ToCampaignEntity(request *contract.CreateCampaignRequest) *entities.Campaig
 		ShowOnApp:   request.ShowOnApp,
 		Position:    request.Position,
 		Metadata:    request.Metadata,
-		Rules:       rules,
+		Rules:       nil, // Rules will be managed separately
 	}
 }
 
@@ -95,13 +87,6 @@ func ToCampaignEntityFromUpdate(request *contract.UpdateCampaignRequest) *entiti
 		return nil
 	}
 
-	var rules []entities.CampaignRule
-	if request.Rules != nil {
-		for _, rule := range request.Rules {
-			rules = append(rules, *ToCampaignRuleEntityFromUpdate(&rule, request.ID))
-		}
-	}
-
 	return &entities.Campaign{
 		ID:          request.ID,
 		Name:        request.Name,
@@ -113,7 +98,7 @@ func ToCampaignEntityFromUpdate(request *contract.UpdateCampaignRequest) *entiti
 		ShowOnApp:   request.ShowOnApp,
 		Position:    request.Position,
 		Metadata:    request.Metadata,
-		Rules:       rules,
+		Rules:       nil, // Rules will be managed separately
 	}
 }
 
@@ -129,7 +114,7 @@ func ToCampaignRuleEntity(request *contract.CampaignRuleStruct, campaignID uuid.
 	}
 
 	return &entities.CampaignRule{
-		ID:             uuid.New(), // Generate unique UUID for each campaign rule
+		ID:             uuid.Nil, // Let GORM's BeforeCreate hook generate the UUID
 		CampaignID:     campaignID,
 		RuleType:       entities.RuleType(request.RuleType),
 		ConditionValue: request.ConditionValue,
@@ -153,7 +138,7 @@ func ToCampaignRuleEntityFromUpdate(request *contract.CampaignRuleStruct, campai
 	}
 
 	return &entities.CampaignRule{
-		ID:             uuid.New(), // Generate new UUID for each campaign rule
+		ID:             uuid.Nil, // Let GORM's BeforeCreate hook generate the UUID
 		CampaignID:     campaignID,
 		RuleType:       entities.RuleType(request.RuleType),
 		ConditionValue: request.ConditionValue,