Programmatic arguments to an UrlBoundView¶
Usually, an UrlBoundView gets its arguments from the current URL. These are passed into
its assemble() method by the framework. In some cases it is useful to pass arguments directly
from your code to assemble().
For example, in the tutorial.parameterised1 example the parameterised EditView is used in AddressBookUI.assemble:
class AddressBookUI(UserInterface):
def assemble(self):
home = self.define_view('/', title='Show')
add = self.define_view('/add', title='Add')
edit = self.define_view('/edit', view_class=EditView, address_id=IntegerField())
home.set_slot('main', AddressBookPanel.factory(self))
add.set_slot('main', AddressForm.factory())
bookmarks = [f.as_bookmark(self) for f in [home, add]]
self.define_page(AddressBookPage, bookmarks)
self.define_transition(Address.events.save, add, home)
self.define_transition(Address.events.update, edit, home)
self.edit = edit
def get_edit_bookmark(self, address, description=None):
return self.edit.as_bookmark(self, address_id=address.id, description=description)
You might want to include a link on EditView for some or other Bookmark that is created in your
code at this point.
If you want to do that, just pass your Bookmark as another keyword argument to enable_refresh().
Keyword arguments of enable_refresh() that are not instances of Field are passed unchanged through
to matching keyword arguments to the EditView.assemble.
So, if you did:
edit = self.define_view('/edit', view_class=EditView, address_id=IntegerField(), some_bookmark=a_bookmark)
You can change your assemble() signature like this:
def assemble(self, address_id=None, some_bookmark=None):
… and then your Bookmark will be accessible as some_bookmark.