削除フラグが誤って付与されるバグ修正（#20） (#21)

#20

#20

#20

#020

Co-authored-by: miteruzo <miteruzo@naver.com>
Reviewed-on: #21

db/my_eloquent.py

@@ -19,13 +19,32 @@ class Model (eloquent.Model):
             self,
             *args:  str,
     ) -> None:
-        q = self.query ()
-        for arg in args:
-            q = q.where (arg, getattr (self, arg))
-        row = q.first ()
+        row = self._find_upsert_row (*args)
         if row is not None:
             self.id = row.id
             # pylint: disable = invalid-name
             # pylint: disable = attribute-defined-outside-init
             self._Model__exists = True
-        self.save ()
+            self.save ()
+            return
+
+        try:
+            self.save ()
+        except Exception:
+            row = self._find_upsert_row (*args)
+            if row is None:
+                raise
+            self.id = row.id
+            # pylint: disable = invalid-name
+            # pylint: disable = attribute-defined-outside-init
+            self._Model__exists = True
+            self.save ()
+
+    def _find_upsert_row (
+            self,
+            *args:  str,
+    ):
+        q = self.query ()
+        for arg in args:
+            q = q.where (arg, getattr (self, arg))
+        return q.first ()