Allow skipping user warnings globally

issue7442
review318871002

CHANGELOG

@@ -1,3 +1,4 @@
+* Allow skipping user warnings globally
 * Add validate option to trytond-admin
 * Refresh pool of other processes
 * Add clear_all method to Cache

doc/topics/user_errors_warnings.rst

@@ -63,3 +63,7 @@ Example:
             warning_name = 'mywarning,%s' % self
             if Warning.check(warning_name):
                 raise UserWarning(warning_name, "Process cannot be canceled.")
+
+.. note::
+    If there is no user interaction the warnings can be skipped by setting the
+    ``_skip_warnings`` key of the context to ``True``.

trytond/res/user.py

@@ -909,8 +909,10 @@ class Warning_(ModelSQL, ModelView):
 
     @classmethod
     def check(cls, warning_name):
-        user = Transaction().user
-        if not user:
+        transaction = Transaction()
+        user = transaction.user
+        context = transaction.context
+        if not user or context.get('_skip_warnings'):
             return False
         warnings = cls.search([
             ('user', '=', user),