diff --git a/flask_admin/contrib/sqla/view.py b/flask_admin/contrib/sqla/view.py
index e3bbbba11..320af0c1c 100644
--- a/flask_admin/contrib/sqla/view.py
+++ b/flask_admin/contrib/sqla/view.py
@@ -1329,7 +1329,13 @@ def get_one(self, id):
             Model id
         """
         session = _get_deprecated_session(self.session)
-        return session.get(self.model, tools.iterdecode(id))
+        _id = tools.iterdecode(id)
+        if isinstance(self._primary_key, tuple):
+            _id = tools.iterdecode(id)
+        else:
+            _id = (tools.escape(id),)
+
+        return session.get(self.model, _id)
 
     # Error handler
     def handle_view_exception(self, exc: Exception) -> bool:
diff --git a/flask_admin/tests/sqla/test_basic.py b/flask_admin/tests/sqla/test_basic.py
index 4b4954bf3..90ce3a00f 100644
--- a/flask_admin/tests/sqla/test_basic.py
+++ b/flask_admin/tests/sqla/test_basic.py
@@ -892,6 +892,16 @@ def test_details_view(app, db, admin, session_or_db):
         assert "test2_val_1" in data
         assert "test1_val_1" in data
 
+        # test single-PK with multiple IDs in query string
+        rv = client.get(
+            "/admin/model2/details/?url=%2Fadmin%2Fmodel2%2F&id=1,2",
+            follow_redirects=True,
+        )
+        data = rv.data.decode("utf-8")
+        assert "String Field" in data
+        assert "test2_val_1" in data
+        assert "test1_val_1" in data
+
         # test column_details_list
         rv = client.get("/admin/sf_view/details/?url=%2Fadmin%2Fsf_view%2F&id=1")
         data = rv.data.decode("utf-8")