refactor: add field to APIError struct

docs/docs.go

@@ -303,6 +303,11 @@ const docTemplate = `{
                     "description": "Additional error details",
                     "type": "string"
                 },
+                "field": {
+                    "description": "Field name if applicable",
+                    "type": "string",
+                    "example": "name"
+                },
                 "message": {
                     "description": "Human-readable error message",
                     "type": "string"

docs/swagger.json

@@ -297,6 +297,11 @@
                     "description": "Additional error details",
                     "type": "string"
                 },
+                "field": {
+                    "description": "Field name if applicable",
+                    "type": "string",
+                    "example": "name"
+                },
                 "message": {
                     "description": "Human-readable error message",
                     "type": "string"

docs/swagger.yaml

@@ -8,6 +8,10 @@ definitions:
       details:
         description: Additional error details
         type: string
+      field:
+        description: Field name if applicable
+        example: name
+        type: string
       message:
         description: Human-readable error message
         type: string

internal/handler/contact_handler.go

@@ -97,17 +97,23 @@ func (h *ContactHandler) create(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if contact.Name == "" {
-		BadRequest(w, ErrMissingRequired, RequiredFieldErr("name"))
+		err := ErrMissingRequired
+		err.Field = "name"
+		BadRequest(w, err, RequiredFieldErr("name"))
 		return
 	}
 
 	if contact.Company == "" {
-		BadRequest(w, ErrMissingRequired, RequiredFieldErr("company"))
+		err := ErrMissingRequired
+		err.Field = "company"
+		BadRequest(w, err, RequiredFieldErr("company"))
 		return
 	}
 
 	if contact.Phone == "" {
-		BadRequest(w, ErrMissingRequired, RequiredFieldErr("phone"))
+		err := ErrMissingRequired
+		err.Field = "phone"
+		BadRequest(w, err, RequiredFieldErr("phone"))
 		return
 	}
 

internal/handler/response.go

@@ -23,6 +23,8 @@ type APIError struct {
 	Message string `json:"message"`
 	// Additional error details
 	Details string `json:"details,omitempty"`
+	// Field name if applicable
+	Field string `json:"field,omitempty" example:"name"`
 }
 
 const content_type = "Content-Type"