[IMP] base: constraint to check view root node is matching the view type

This PR follows odoo/odoo#108073

Just ensure the root node of the view architecture matches
the view type.

e.g.

Valid:
```xml
<form>
...
</form>
```

Invalid:
```xml
<data>
  <div>
    ...
  </div>
  <form>
    ...
  </form>
</data>
```

closes odoo/odoo#108525

Related: odoo/upgrade#4155
Related: odoo/enterprise#35501
Signed-off-by: Denis Ledoux (dle) <dle@odoo.com>

odoo/addons/base/models/ir_ui_view.py

@@ -1394,7 +1394,7 @@ actual arch.
     # view validation
     #-------------------------------------------------------------------
 
-    def _validate_view(self, node, model_name, editable=True, full=False):
+    def _validate_view(self, node, model_name, view_type=None, editable=True, full=False):
         """ Validate the given architecture node, and return its corresponding
         NameManager.
 
@@ -1407,6 +1407,13 @@ actual arch.
         """
         self.ensure_one()
 
+        view_type = view_type or self.type
+        if node.tag != view_type:
+            self._raise_view_error(_(
+                'The root node of a %(view_type)s view should be a <%(view_type)s>, not a <%(tag)s>',
+                view_type=view_type, tag=node.tag,
+            ), node)
+
         if model_name not in self.env:
             self._raise_view_error(_('Model not found: %(model)s', model=model_name), node)
 
@@ -1492,7 +1499,7 @@ actual arch.
             if len(searchpanels) > 1:
                 self._raise_view_error(_('Search tag can only contain one search panel'), node)
             node.remove(searchpanels[0])
-            self._validate_view(searchpanels[0], name_manager.model._name,
+            self._validate_view(searchpanels[0], name_manager.model._name, view_type="searchpanel",
                                 editable=False, full=node_info['validate'])
 
     def _validate_tag_field(self, node, name_manager, node_info):
@@ -1531,7 +1538,7 @@ actual arch.
                     continue
                 node.remove(child)
                 sub_manager = self._validate_view(
-                    child, field.comodel_name, editable=node_info['editable'], full=validate,
+                    child, field.comodel_name, view_type=child.tag, editable=node_info['editable'], full=validate,
                 )
                 for fname, groups_uses in sub_manager.mandatory_parent_fields.items():
                     for groups, use in groups_uses.items():
@@ -1645,7 +1652,7 @@ actual arch.
             groupby_node = E.groupby(*node)
             # validate the node as a nested view
             sub_manager = self._validate_view(
-                groupby_node, field.comodel_name, editable=False, full=node_info['validate'],
+                groupby_node, field.comodel_name, view_type="groupby", editable=False, full=node_info['validate'],
             )
             name_manager.has_field(node, name)
             for fname, groups_uses in sub_manager.mandatory_parent_fields.items():

odoo/addons/base/tests/test_views.py

@@ -1548,6 +1548,11 @@ class TestViews(ViewCase):
         kw.setdefault('active', True)
         if 'arch_db' in kw:
             arch_db = kw['arch_db']
+            if kw.get('inherit_id'):
+                self.cr.execute('SELECT type FROM ir_ui_view WHERE id = %s', [kw['inherit_id']])
+                kw['type'] = self.cr.fetchone()[0]
+            else:
+                kw['type'] = etree.fromstring(arch_db).tag
             kw['arch_db'] = Json({'en_US': arch_db}) if self.env.lang == 'en_US' else Json({'en_US': arch_db, self.env.lang: arch_db})
 
         keys = sorted(kw)
@@ -1558,6 +1563,32 @@ class TestViews(ViewCase):
         self.cr.execute(query, kw)
         return self.cr.fetchone()[0]
 
+    def test_view_root_node_matches_view_type(self):
+        view = self.View.create({
+            'name': 'foo',
+            'model': 'ir.ui.view',
+            'arch': """
+                <form>
+                </form>
+            """,
+        })
+        self.assertEqual(view.type, 'form')
+
+        with self.assertRaises(ValidationError):
+            self.View.create({
+                'name': 'foo',
+                'model': 'ir.ui.view',
+                'type': 'form',
+                'arch': """
+                    <data>
+                        <div>
+                        </div>
+                        <form>
+                        </form>
+                    </data>
+                """,
+            })
+
     def test_custom_view_validation(self):
         model = 'ir.actions.act_url'
         validate = partial(self.View._validate_custom_views, model)