diff --git a/src/entity/base_entity.rs b/src/entity/base_entity.rs
index cf7df8b7..e0f92b09 100644
--- a/src/entity/base_entity.rs
+++ b/src/entity/base_entity.rs
@@ -246,8 +246,13 @@ pub trait EntityTrait: EntityName {
             if let Some(key) = keys.next() {
                 let col = key.into_column();
                 select = select.filter(col.eq(v));
+            } else {
+                panic!("primary key arity mismatch");
             }
         }
+        if keys.next().is_some() {
+            panic!("primary key arity mismatch");
+        }
         select
     }