Add Form.show_cancel flag, for hiding that button

also use fields from schema by default, if fields not provided

tailbone/forms2/core.py

@@ -321,6 +321,7 @@ class Form(object):
     Base class for all forms.
     """
     update_label = "Save"
+    show_cancel = True
 
     def __init__(self, fields=None, schema=None, request=None, readonly=False, readonly_fields=[],
                  model_instance=None, model_class=None, nodes={}, enums={}, labels={}, renderers=None,
@@ -331,6 +332,8 @@ class Form(object):
         if fields is not None:
             self.set_fields(fields)
         self.schema = schema
+        if self.fields is None and self.schema:
+            self.set_fields([f.name for f in self.schema])
         self.request = request
         self.readonly = readonly
         self.readonly_fields = set(readonly_fields or [])

tailbone/templates/forms2/deform.mako

@@ -76,7 +76,9 @@ ${h.csrf_token(request)}
 ##         % if form.creating and form.allow_successive_creates:
 ##             ${h.submit('create_and_continue', form.successive_create_label)}
 ##         % endif
-      ${h.link_to("Cancel", form.cancel_url, class_='button autodisable')}
+      % if getattr(form, 'show_cancel', True):
+          ${h.link_to("Cancel", form.cancel_url, class_='button autodisable')}
+      % endif
     </div>
 % endif