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请参阅my previous question。我根据Kevin P的回答更新了代码,但现在我无法将最新的标签排在最前面。我的意见如下query.order("date")
。你知道为什么带有减号的日期有效,但没有减号不起作用吗?按日期排序时的PropertyError(Google App Engine - Python)
我的模式是:
class Owner(db.Model):
owner = db.UserProperty()
owner_tag = db.StringProperty()
tag_value = db.IntegerProperty()
url = db.StringProperty()
处理程序,提请标签表:
class UserAdminPage(webapp.RequestHandler):
def get(self):
order_by = self.request.get("order")
...
#-----------tags table-----------------#
query = Owner.all()
query.filter("owner =", user)
if not order_by:
query.order("owner_tag")
#-----------when both "date" has a minus sign the table is sorted correctly
#-----------when I remove the minus signs I get `PropertyError: Invalid property name 'date'`
elif order_by == "-date":
query.order("-date")
w = query.fetch(500)
user_tag_list = []
for item in w:
user_tag_list.append(item.owner_tag)
# unique_tags = sorted(f1.f2(user_tag_list))
unique_tags = f1.f2(user_tag_list)
#-----------holding table start--------#
self.response.out.write("""
<table border="0" cellpadding="0" cellspacing="20" >
<tr>
<td>""")
#-----------tags table start--------#
self.response.out.write("""<table border="1">
<tr>
<th colspan="3">tags<br />
<a href="/useradminpage?order=date"><span id=small>most recent</span></a></th>
</tr>
""")
for tag in unique_tags:
self.response.out.write("""
<tr>
<td><a href="/tag?tag=%s">%s</a></td>
</tr>
""" %
(tag, tag)
)
self.response.out.write("""</table>""")
...
太好了!谢谢。现在所有的作品。 – Zeynel
很高兴帮助:) –