fix:Invalid post search criteria

models/post.go

@@ -90,6 +90,9 @@ func (e *Post) GetPage(pageSize int, pageIndex int) ([]Post, int, error) {
 	if e.PostName != "" {
 		table = table.Where("post_name = ?", e.PostName)
 	}
+	if e.PostCode != "" {
+		table = table.Where("post_code = ?", e.PostCode)
+	}
 	if e.Status != "" {
 		table = table.Where("status = ?", e.Status)
 	}