我想使用Django .annotate显示TIdMultipartFormDataStream
天。
在下面的代码中,
http.Request.ContentType := 'application/octet-stream';
http.Request.Accept := '*/*';
http.Request.AcceptLanguage := 'ru-RU,ru;q=0.9,en-US;q=0.8,en;q=0.7';
//http.Request.AcceptEncoding := 'gzip, deflate';
http.Request.Referer := 'https://flagma.ru/my/1538481/podat-obyavlenie.html';
fnShort := ExtractFileName(fn); // fn - full image file
url := 'https://flagma.ru/messageuploadphoto.php?qqfile=' + fnShort;
http.Request.CustomHeaders.Values['X-Mime-Type'] := GetMIMETypeFromFile(fn);
http.Request.CustomHeaders.Values['X-File-Name'] := fnShort;
http.Request.CustomHeaders.Values['X-Requested-With'] := 'XMLHttpRequest';
fs := TFileStream.Create(fn, fmOpenRead or fmShareDenyWrite);
try
try
response := http.Post(url, fs);
except
response := '';
end;
finally
fs.Free;
end;
{ alternatively: you can pass the full file path to Post()...
try
response := http.Post(url, fn);
except
response := '';
end;}
工作正常,可以给我加一年,但是我想要日期加上345天。
代码:
my_date + 345
删除代码中的#后,我的页面将不会生成。
四处搜寻之后,我也尝试过:
date_plus_1=ExtractYear('my_date')+1,
但是那也不起作用。
在.annotate中使用timedelta的正确方法是什么?
答案 0 :(得分:2)
您忘记指定ExpressionWrapper
expression [Django-doc]的output_field=...
参数:
from datetime import timedelta
from django.db.models import DateTimeField, ExpressionWrapper, F
MyModel.objects.annotate(
date_plus345=ExpressionWrapper(
F('creation_date') + timedelta(days=345),
output_field=DateTimeField()
)
)