source: WAeUP_SRP/trunk/skins/waeup_utilities/getNonImageKeys.py

## Script (Python) "getNonImageKeys"
##bind container=container
##bind context=context
##bind namespace=
##bind script=script
##bind subpath=traverse_subpath
##parameters=
##title=
##

info = context.waeup_tool.getAccessInfo(context)
student_id = info['student_id']
if student_id is None:
    return None

stool = context.portal_schemas
ttool = context.portal_types
#student_id = context.getStudentId()
students_folder = context.portal_url.getPortalObject().campus.students
student_obj = getattr(students_folder,student_id)
student_subobject_ids = student_obj.objectIds() 
non_image_keys = {}
for sub_obj_id in student_subobject_ids:
    sub_obj = getattr(student_obj,sub_obj_id)
    sub_pt = sub_obj.portal_type
    pt_ob = getattr(ttool,sub_pt)
    sub_schemas = pt_ob.schemas
    for i in sub_schemas:
        if i.startswith('student_'):
            schema_id = i
            schema = getattr(stool,schema_id)
            non_image_keys[schema_id] = [key for key in schema.keys()
                             if schema[key].meta_type != "CPS Image Field"]

return non_image_keys