cms_status_message: add method to clear status messages

cms_form/models/cms_form.py

@@ -233,3 +233,6 @@ def form_process_POST(self, render_values):
 
     def add_status_message(self, msg, **kw):
         self.env["ir.http"].add_status_message(msg, request=self.o_request, **kw)
+
+    def clear_status_messages(self):
+        self.env["ir.http"].clear_status_messages()

cms_status_message/models/ir_http.py

@@ -105,3 +105,16 @@ def get_status_message(self, session=None):
         if session:
             return session.pop("status_message", [])
         return []
+
+    @api.model
+    def clear_status_messages(self, session=None):
+        """Clear status messages from current session.
+
+        :param session: odoo http session.
+        By default is taken from the current request.
+        """
+        session = session or http.request.session
+        if session:
+            session["status_message"] = []
+        if hasattr(session, "touch"):
+            session.touch()

cms_status_message/tests/test_message.py

@@ -30,6 +30,10 @@ def get_status_message(self, **kw):
         with self.mock_request():
             return self.env["ir.http"].get_status_message(**kw)
 
+    def clear_status_messages(self, **kw):
+        with self.mock_request():
+            return self.env["ir.http"].clear_status_messages(**kw)
+
     @contextmanager
     def mock_request(self):
         request = MockRequest(self.env)
@@ -69,6 +73,14 @@ def test_message_add_message_extra_args(self):
         self.assertEqual(msg["dismissible"], False)
         self.assertEqual(msg["msg"], "you cannot remove me!")
 
+    def test_message_clear_messages(self):
+        # Clear all existing messages
+        self.add_status_message("well done!")
+        self.add_status_message("once again!")
+        self.clear_status_messages()
+        msgs = self.get_status_message()
+        self.assertEqual(msgs, [])
+
     def _render(self):
         return self.env["ir.qweb"]._render("cms_status_message.status_message", {})