add StrippingFieldRenderer

edbob/pyramid/forms/formalchemy/__init__.py

@@ -50,7 +50,8 @@ from edbob.pyramid.forms.formalchemy.renderers import *
 __all__ = ['ChildGridField', 'PropertyField', 'EnumFieldRenderer',
            'PrettyDateTimeFieldRenderer', 'AutocompleteFieldRenderer',
            'FieldSet', 'make_fieldset', 'required', 'pretty_datetime',
-           'AssociationProxyField', 'YesNoFieldRenderer']
+           'AssociationProxyField', 'StrippingFieldRenderer',
+           'YesNoFieldRenderer']
 
 
 class TemplateEngine(formalchemy.templates.TemplateEngine):

edbob/pyramid/forms/formalchemy/renderers.py

@@ -32,7 +32,7 @@ from pyramid.renderers import render
 
 
 __all__ = ['AutocompleteFieldRenderer', 'EnumFieldRenderer',
-           'YesNoFieldRenderer']
+           'StrippingFieldRenderer', 'YesNoFieldRenderer']
 
 
 def AutocompleteFieldRenderer(service_url, field_value=None, field_display=None, width='300px'):
@@ -83,6 +83,17 @@ def EnumFieldRenderer(enum):
     return Renderer
 
 
+class StrippingFieldRenderer(formalchemy.TextFieldRenderer):
+    """
+    Standard text field renderer, which strips whitespace from either end of
+    the input value on deserialization.
+    """
+
+    def deserialize(self):
+        value = super(StrippingFieldRenderer, self).deserialize()
+        return value.strip()
+
+
 class YesNoFieldRenderer(formalchemy.fields.CheckBoxFieldRenderer):
 
     def render_readonly(self, **kwargs):