fields.py 文件源码

def __init__(self, fields=(), keys=(), require_all_fields=False, max_value_length=25, *args, **kwargs):
        if (fields and keys) or (not fields and not keys):
            raise ValueError("NestedFormField requires either a tuple of fields or keys but not both")

        if keys:
            fields = []
            for key in keys:
                field = CharField(max_length=max_value_length, required=False)
                fields.append((key, field))
        form_fields = []
        widgets = []
        self.labels = []
        self.names = {}
        for field in fields:
            label = field[1].label or field[0]
            self.names[label] = field[0]
            self.labels.append(label)
            form_fields.append(field[1])
            widgets.append(field[1].widget)
        widget = NestedFormWidget(self.labels, widgets, self.names)
        super(NestedFormField, self).__init__(*args, fields=form_fields, widget=widget,
                                              require_all_fields=require_all_fields, **kwargs)