misc: add .strip method to lazy variables (#44381)

tests/test_formdata.py

@@ -956,6 +956,18 @@ def test_lazy_map_variable(pub, variable_test_data):
             assert WorkflowStatusItem.compute('{{ "1;2"|distance:form_var_map|floatformat }}', raises=True) == ''
 
 
+def test_lazy_strip_method(pub, variable_test_data):
+    formdef = FormDef.select()[0]
+    formdata = formdef.data_class().select()[0]
+    formdata.data['0'] = ' bar '
+    for mode in (None, 'lazy'):
+        pub.substitutions.reset()
+        pub.substitutions.feed(formdef)
+        with pub.substitutions.temporary_feed(formdata, force_mode=mode):
+            assert WorkflowStatusItem.compute('{{ form_var_foo_foo }}', raises=True) == ' bar '
+            assert WorkflowStatusItem.compute('{{ form_var_foo_foo.strip }}', raises=True) == 'bar'
+
+
 def test_lazy_conditions(pub, variable_test_data):
     condition = Condition({'type': 'django', 'value': 'form_var_foo_foo == "bar"'})
     assert condition.evaluate() is True

wcs/variables.py

@@ -588,6 +588,10 @@ class LazyFieldVar(object):
     def startswith(self, other):
         return self.get_value().startswith(other)
 
+    def strip(self, *args):
+        warnings.warn('Deprecated use of .strip method', DeprecationWarning)
+        return self.get_value().strip(*args)
+
     def __getstate__(self):
         raise AssertionError('lazy cannot be pickled')