为什么Django发送错误的电子邮件模板？

Question

我无法找到此代码中的错误。我试过隔离这个问题，但它工作当我将相关的代码复制到一个单独的文件。问题必须与周围的代码，但我不明白它甚至是相关的。这里的一切：

问题是与“激活您的PROJECT帐户”电子邮件。它向我发送一封电子邮件，它是这样的：

--===============1413769924== 
Content-Type: text/plain; charset="utf-8" 
MIME-Version: 1.0 
Content-Transfer-Encoding: quoted-printable 

text here 

--===============1413769924== 
Content-Type: text/html; charset="utf-8" 
MIME-Version: 1.0 
Content-Transfer-Encoding: quoted-printable 

text here 

其中“文本这里”是电子邮件的两个版本是相同的，但它是不是在实际文件和ISN” t当我尝试从不同的脚本发送电子邮件。下面的代码：

def join_transporter(request): 
    form = TransporterJoinForm(request.POST) 

    if request.POST and form.is_valid(): 
     user = User(
      username = form.username.val, 
      first_name = form.first_name.val, 
      last_name = form.last_name.val, 
      email = form.email.val, 
      is_active = False, 
     ) 
     user.set_password(form.password1.val) 
     user.save() 

     Profile.objects.create(
      user = user, 
      phone = form.phone.val, 
      company_name = form.company_name.val, 
      details = Transporter.objects.create(), 
      address = Address.objects.create(
       city = form.address.city.val, 
       province = form.address.province.val, 
       country = form.address.country.val, 
       street = form.address.street.val, 
       postal_code = form.address.postal.val 
      ) 
     ) 

     e = send_multipart_email('Activate Your PROJECT Account', 
      'emails/transporter_joined', 
      {'user':user, 'fee': settings.PROJECT_FEE * Decimal('100.00'),'settings':settings}, 
      [user.email], 
      send_immediately=False 
     ) 
     e.attach_file('/home/PROJECT/webapps/media/files/InsuranceLetter.pdf') 
     e.send() # <------- PROBLEM IS HERE 

     send_multipart_email('Transporter Joined', 
      'emails/staff_transporter_joined', 
      {'trans':user,'settings':settings}, 
      ['[email protected]','[email protected]'] 
     ) 
     messages.info(request, 'Thank you for registering. Please check your email for details on how to activate your account.') 
     return redirect('home') 





def send_multipart_email(subject, template, data_dict, recipient_list, from_email=settings.DEFAULT_FROM_EMAIL, send_immediately=True): 
    if not isinstance(recipient_list, list): recipient_list = [recipient_list] 

    d = {'settings':settings} # default context vars 
    d.update(data_dict) 
    c = Context(d) 

    try: 
     tt = loader.get_template(template+'.txt') 
    except: 
     try: 
      ht = loader.get_template(template+'.html') 
     except: 
      raise Exception('Neither `%(tmpl)s.txt` or `%(tmpl)s.html` could be found.' % {'tmpl':template}) 
     else: 
      e = EmailMultiAlternatives(subject, ht.render(c), from_email, recipient_list) 
      e.content_subtype = 'html' 
    else: 
     e = EmailMultiAlternatives(subject, tt.render(c), from_email, recipient_list) 

     try: 
      ht = loader.get_template(template+'.html') 
     except: 
      pass 
     else: 
      e.attach_alternative(ht.render(c), 'text/html') 

    if send_immediately: 
     e.send() 

    return e 




[[email protected] emails]$ ls 
account_activated.txt  shipper_accepted_bid.txt   transporter_awarded_shipment.txt 
base.html     shipper_joined.html    transporter_bid_declined.html 
base.txt     shipper_joined.txt    transporter_bid_declined.txt 
forgot_password.html  staff_transporter_joined.html transporter_joined.html 
forgot_password.txt  staff_transporter_joined.txt  transporter_joined.txt 
invoice_generated.html  transporter_approved.html  transporter_lost_auction.html 
invoice_generated.txt  transporter_auction_closed.html transporter_lost_auction.txt 
shipper_accepted_bid.html transporter_auction_closed.txt 

票：http://code.djangoproject.com/ticket/13364

Answer 1

我不能重新像你所描述的任何（类似拉米罗谁回答的票，并且也不能再现问题）。如果我有两个具有相同基本名称，不同扩展名，不同内容的模板，并从代码中剪切和粘贴以从视图发送电子邮件，我会在发送的邮件中显示不同的内容（在Gmail上并检查“原始” ）。

你说你的.html和.txt文件是不同的，但是根据你所说的一切，它确实听起来你的.html文件有.txt内容。您已经列出了文件系统和应用程序目录加载器：哪一个应该是查找这些文件？也许在另一个人看起来有错误内容的地方有一个流浪文件？

shell中的一些实验可能会帮助您进行调试。加载.html模板，看看它是否真的包含你认为它的作用。例如：

>>> from django.template import loader 
>>> from pprint import pprint 
>>> template = 'emails/dun' 
>>> ht = loader.get_template(template+'.html') 
>>> pprint(ht.nodelist) 
[<Text Node: '<p><strong>Mr. '>, 
<Variable Node: user>, 
<Text Node: '</strong>: Pay us $ '>, 
<Variable Node: amt>, 
<Text Node: ' before next Friday.</p> 
'>] 

验证html的版本是从.TXT版本不同：

>>> tt = loader.get_template(template+'.txt') 
>>> pprint(tt.nodelist) 
[<Variable Node: user>, 
<Text Node: ': This is an important me'>, 
<Variable Node: amt>, 
<Text Node: '. 
'>] 

如果在加载时一样，那么你需要考虑为什么正确的模板文件ISN找不到，或者为什么找到的内容有错误，答案与render（）代码无关。只有当它们在加载时不同并且在渲染时相同才会查看render（）是必要的。

更新：因此根据问题更新，加载的模板是不同的，因为每个模板扩展了一个不同名称的基本模板。所以下一个问题就是，这些基本模板是不同的？更改我的娱乐场景以匹配您的场景，至少就原始加载的模板扩展基本模板而言，我仍然无法重新创建问题。我看到不同的模板装：

>>> from django.template import loader, Context 
>>> from pprint import pprint 
>>> template = 'emails/dun' 
>>> ht = loader.get_template(template+'.html') 
>>> pprint(ht.nodelist) 
[<ExtendsNode: extends "emails/base.html">] 
>>> tt = loader.get_template(template+'.txt') 
>>> pprint(tt.nodelist) 
[<ExtendsNode: extends "emails/base.txt">] 

这使得不同：

>>> c = Context({'user': 'Joe', 'amt': '50.00'}) 
>>> tt.render(c) 
u'\nJoe: This is an important message. You owe us $ 50.00.\n\n' 
>>> ht.render(c) 
u'<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xm 
lns="http://www.w3.org/1999/xhtml">\n<head>\n<title></title>\n</head>\n<body>\n\n<p><strong>Mr. Joe</strong>: Pay us $ 5 
0.00 before next Friday.</p>\n\n</body>\n</html>\n' 

因为引用的基本模板有不同的内容：

>>> template = 'emails/base' 
>>> ht = loader.get_template(template+'.html') 
>>> pprint(ht.nodelist) 
[<Text Node: '<!DOCTYPE html PUBLIC "-/'>, 
<Block Node: title. Contents: []>, 
<Text Node: '</title> 
</head> 
<body> 
'>, 
<Block Node: content. Contents: []>, 
<Text Node: ' 
</body> 
</html> 
'>] 
>>> tt = loader.get_template(template+'.txt') 
>>> pprint(tt.nodelist) 
[<Block Node: content. Contents: []>, <Text Node: ' 
'>] 
>>> 

Answer 2

get_template()查找第一个匹配模板settings.TEMPLATE_LOADERS

TEMPLATE_LOADERS通常是从filesystem和app_directories

app_directories检查内置所有INSTALLED_APPS为模板

所以，我会检查所有的settings.INSTALLED_APPS为模板，有一个“邮件”文件夹中，并重命名您的模板，或将首先在INSTALLED_APPS列表中选择一个。

Answer 3

仅供参考，我想我终于算出这是一个Django开发服务器的bug！当我切换到生产环境并在我的apache服务器上运行时，我似乎没有这个问题。