blocks.py 文件源码

def __init__(self, target_model, filter_name=None, **kwargs):
        super(ModelChooserBlock, self).__init__(**kwargs)
        self._target_model = target_model

        self.filter_name = filter_name

        if self.meta.icon == 'placeholder':
            # Get the icon from the chooser.
            # The chooser may not have been registered yet, depending upon
            # import orders and things, so get the icon lazily
            self.meta.icon = lazy(lambda: self.chooser.icon, str)()