forms.py 文件源码

def __init__(self, *args, **kwargs):
        super(ExhibitorGeneralForm, self).__init__(*args, **kwargs)
        self.helper = FormHelper()
        if self.instance and self.instance.logo:
            self.helper.layout = Layout(
                Field("projectName"),
                Field("logo"),
                Div(
                    HTML("<p>Current logo:</p><img src=\"{{object.logo.url}}\" style=\"max-height:200px\"/>"),
                    css_class = "control-group"),
                Field("homepage"),
#               FormActions(Submit("Save", "Save changes"))
            )
        else:
            self.helper.layout = Layout(
                Field("projectName"),
                Div(
                    Div(Field("logo"),css_class = "col-md-2"),
                    css_class = "row"
                ),
                Field("homepage"),
#               FormActions(Submit("Save", "{% if object %}Save changes{% else %}Register{% endif %}"))
            )

        if self.instance is not None and self.instance.id is not None:
            self.helper.add_input(Submit("Save", "Save changes"))
        else:
            self.helper.add_input(Submit("Save", "Register"))