All posts in Python

使用 MIMEApplication 並設置 attachment 的 header
不然如果檔名有中文的話
用 Gmail 收到的附件檔名會是 noname

def withdraw_send_email(request, pk):
    withdraw = get_object_or_404(Withdraw, pk=pk)

    email = '[email protected]'
    subject = _(u'Packer 數位發行服務')
    body = render_to_string('dps/email/withdraw_notice.html', {})

    message = EmailMessage(
        subject=subject,
        body=body,
        to=[email, ],
    )
    message.content_subtype = 'html'

    from email.mime.application import MIMEApplication

    # 檔名包含中文的話，要用這種方式 Gmail 收到的附件檔名才不會是 noname
    filename = '%s 結算表.xlsx' % (withdraw.serial_number[:6].encode('utf-8'))
    file_data = withdraw.file.read()
    attach_file = MIMEApplication(file_data, _subtype='vnd.ms-excel')
    attach_file.add_header('Content-Disposition', 'attachment; filename="%s"' % (filename))

    message.attach(attach_file)

    message.send()

    return HttpResponse('OK')

ref:
https://docs.python.org/2/library/email.mime.html

Creating a custom template tag for assigning variables in Django template.

in app/templatetags/common.py

from django import template
register = template.Library()

class SetVarNode(template.Node):

    def __init__(self, var_name, var_value):
        self.var_name = var_name
        self.var_value = var_value

    def render(self, context):
        try:
            value = template.Variable(self.var_value).resolve(context)
        except template.VariableDoesNotExist:
            value = ""
        context[self.var_name] = value

        return u""

@register.tag(name='set')
def set_var(parser, token):
    """
    {% set some_var = '123' %}
    """
    parts = token.split_contents()
    if len(parts) < 4:
        raise template.TemplateSyntaxError("'set' tag must be of the form: {% set <var_name> = <var_value> %}")

    return SetVarNode(parts[1], parts[3])

in app/templates/xxx.html

{% load common %}

{% if work and is_public_work %}
    {% ifequal link_class 'info_box pull-right' %}
        {% set ga_label = 'card' %}
    {% else %}
        {% set ga_label = ga_label_detail %}
    {% endifequal %}
    <a class="{{ ga_label }}">123</a>
{% endif %}