build_attrs() 得到了意外的关键字参数“type”

Question

我正在使用 django 框架并尝试集成 paypal 支付网关。但我收到这个错误

build_attrs() got an unexpected keyword argument 'type'

Django 版本：1.11.11
Python 版本：3.6.3
异常值：build_attrs() 获得意外的关键字参数“type”
异常位置：/home/iuser/anaconda3/lib/python3.6/site-packages/paypal/standard/渲染中的 widgets.py，第 35 行

from django import forms
try:
    from django.forms.utils import flatatt # Django 1.7 and later
except ImportError:
    from django.forms.util import flatatt # earlier

from django.utils.safestring import mark_safe
from django.utils.encoding import force_text


class ValueHiddenInput(forms.HiddenInput):
    """
    Widget that renders only if it has a value.
    Used to remove unused fields from PayPal buttons.
    """

    def render(self, name, value, attrs=None):
        if value is None:
            return u''
        else:
            return super(ValueHiddenInput, self).render(name, value, attrs)


class ReservedValueHiddenInput(ValueHiddenInput):
    """
    Overrides the default name attribute of the form.
    Used for the PayPal `return` field.
    """

    def render(self, name, value, attrs=None):
        if value is None:
            value = ''
        final_attrs = self.build_attrs(attrs, type=self.input_type)
        if value != '':
            final_attrs['value'] = force_text(value)
        return mark_safe(u'<input%s />' % flatatt(final_attrs))

Answer 1

在django-1.11中，函数已按照发行说明 [Django-doc]build_attrs中的指定进行了更改：

私有API的签名Widget.build_attrs() 由extra_attrs=None, **kwargs改为base_attrs, extra_attrs=None.

您需要将调用更改为：

class ReservedValueHiddenInput(ValueHiddenInput):
    """
    Overrides the default name attribute of the form.
    Used for the PayPal `return` field.
    """

    def render(self, name, value, attrs=None):
        if value is None:
            value = ''
        final_attrs = self.build_attrs(attrs, {'type': self.input_type})
        if value != '':
            final_attrs['value'] = force_text(value)
        return mark_safe(u'<input%s />' % flatatt(final_attrs))