[FIX] cetmix_tower_server: resolve conflict

Task: 4055

cetmix_tower_server/models/cx_tower_access_mixin.py

@@ -38,4 +38,3 @@ def _default_access_level(self):
             Char: `access_level` field selection value
         """
         return "2"
-

cetmix_tower_server/models/cx_tower_variable_value.py

@@ -239,6 +239,35 @@ def _inverse_value_char(self):
                         )
                     )
 
+    @api.constrains("access_level", "variable_id")
+    def _check_access_level_consistency(self):
+        """
+        Ensure that the access level of the variable value is not lower than
+        the access level of the associated variable.
+        """
+        for rec in self:
+            if rec.variable_id and rec.access_level < rec.variable_id.access_level:
+                raise ValidationError(
+                    _(
+                        "The access level for Variable Value '%(value)s' cannot be"
+                        "lower than the access level of its Variable '%(variable)s'.\n"
+                        "Variable Access Level: %(var_level)s\n"
+                        "Variable Value Access Level: %(val_level)s",
+                        value=rec.value_char or "Undefined",
+                        variable=rec.variable_id.name,
+                        var_level=dict(
+                            rec.fields_get(["access_level"])["access_level"][
+                                "selection"
+                            ]
+                        )[rec.variable_id.access_level],
+                        val_level=dict(
+                            rec.fields_get(["access_level"])["access_level"][
+                                "selection"
+                            ]
+                        )[rec.access_level],
+                    )
+                )
+
     def _used_in_models(self):
         """Returns information about models which use this mixin.
 

cetmix_tower_server/views/cx_tower_variable_view.xml

@@ -72,7 +72,6 @@
         </field>
     </record>
 
-
     <record id="cx_tower_variable_view_tree" model="ir.ui.view">
         <field name="name">cx.tower.variable.view.tree</field>
         <field name="model">cx.tower.variable</field>