def itemAddOrUpdate(request, item_id=None):
"""Adds an item if not present, otherwise updates with values from request
instance.
Arg:
request: request instance from user interaction on page
item_id: If present, the record for this id will be updated.
Returns:
If item is added/updated, redirects to parent category.
If item add/update fails, page reloads with error message.
If informatin is missing, page reloads with error message.
"""
name, category_id, description = itemAdminFields(request)
user = getUser()
if name and description and category_id and user:
item = Item.add_or_update(name, description, category_id, user.user_id,
item_id)
if item:
msg = 'New Item Successfully Updated'
flash(msg)
return redirect('/category/' + category_id)
else:
msg = 'An Error Occurred, Item did not update or add'
flash(msg)
# Reload page with their values
return render_template('item_admin.html',
name=name,
category_id=category_id,
description=description,
user_curr=getUser())
else:
msg = 'Please provide a value in all fields'
flash(msg)
return render_template('item_admin.html', user_curr=getUser())