fix: support up to 6-ary composite primary key (#423)

src/entity/active_model.rs

@@ -138,7 +138,31 @@ pub trait ActiveModelTrait: Clone + Debug {
                 let s3 = next!();
                 Some(ValueTuple::Three(s1, s2, s3))
             }
-            _ => panic!("The arity cannot be larger than 3"),
+            4 => {
+                let s1 = next!();
+                let s2 = next!();
+                let s3 = next!();
+                let s4 = next!();
+                Some(ValueTuple::Four(s1, s2, s3, s4))
+            }
+            5 => {
+                let s1 = next!();
+                let s2 = next!();
+                let s3 = next!();
+                let s4 = next!();
+                let s5 = next!();
+                Some(ValueTuple::Five(s1, s2, s3, s4, s5))
+            }
+            6 => {
+                let s1 = next!();
+                let s2 = next!();
+                let s3 = next!();
+                let s4 = next!();
+                let s5 = next!();
+                let s6 = next!();
+                Some(ValueTuple::Six(s1, s2, s3, s4, s5, s6))
+            }
+            _ => panic!("The arity cannot be larger than 6"),
         }
     }