Fix dynamic A TTL update fallback for generic validation error

internal/provider/resource_dns_record.go

@@ -587,11 +587,12 @@ func isUnsupportedEmptyContentError(err error) bool {
 	if normalizedType != "validation exception" {
 		return false
 	}
-	normalizedMessage := strings.ToLower(strings.TrimSpace(apiErr.Message))
+	normalizedMessage := strings.ToLower(strings.TrimSpace(strings.TrimSuffix(apiErr.Message, ".")))
 	return strings.Contains(normalizedMessage, "content is required") ||
 		strings.Contains(normalizedMessage, "ipv4address is required") ||
 		strings.Contains(normalizedMessage, "ipv6address is required") ||
-		strings.Contains(normalizedMessage, "invalid ip address")
+		strings.Contains(normalizedMessage, "invalid ip address") ||
+		normalizedMessage == "invalid"
 }
 
 func (r *dnsRecordResource) applyDynamicBootstrapFallback(ctx context.Context, domainID int64, req dynuclient.CreateDNSRecordRequest, diagnostics *diag.Diagnostics) (dynuclient.CreateDNSRecordRequest, bool) {

internal/provider/resource_dns_record_test.go

@@ -228,6 +228,24 @@ func TestIsUnsupportedEmptyContentError(t *testing.T) {
 			},
 			want: true,
 		},
+		{
+			name: "status 505 generic invalid with period",
+			err: &dynuclient.APIError{
+				StatusCode: 505,
+				Type:       "Validation Exception",
+				Message:    "Invalid.",
+			},
+			want: true,
+		},
+		{
+			name: "status 505 generic invalid without period",
+			err: &dynuclient.APIError{
+				StatusCode: 505,
+				Type:       "Validation Exception",
+				Message:    "Invalid",
+			},
+			want: true,
+		},
 		{
 			name: "status 505 unrelated message",
 			err: &dynuclient.APIError{
@@ -246,6 +264,24 @@ func TestIsUnsupportedEmptyContentError(t *testing.T) {
 			},
 			want: false,
 		},
+		{
+			name: "status 500 generic invalid",
+			err: &dynuclient.APIError{
+				StatusCode: 500,
+				Type:       "Validation Exception",
+				Message:    "Invalid.",
+			},
+			want: false,
+		},
+		{
+			name: "status 505 non validation generic invalid",
+			err: &dynuclient.APIError{
+				StatusCode: 505,
+				Type:       "Some Other Exception",
+				Message:    "Invalid.",
+			},
+			want: false,
+		},
 	}
 
 	for _, tc := range tests {