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How do I use pagination with Django class based generic ListViews?
... I have been doing this, but the problem I find, is when I do extra processing on objects in the queryset, it applys them to all of the results in the database. So for a query that returns 100 objects, but shows only ten objects per page, the extra processing will be done on 100 objects...
SQL Server, convert a named instance to default instance?
... applications.
If you want to access a named instance from any connection string without using the instance name, and using only the server name and/or IP address, then you can do the following:
Open SQL Server Configuration Manager
Click SQL Server Network Configuration
Click Protocols for INSTA...
Where am I? - Get country
...the country code set for the phone (phones language, NOT user location):
String locale = context.getResources().getConfiguration().locale.getCountry();
can also replace getCountry() with getISO3Country() to get a 3 letter ISO code for the country. This will get the country name:
String locale...
MySQL CONCAT returns NULL if any field contain NULL
...
convert the NULL values with empty string by wrapping it in COALESCE
SELECT CONCAT(COALESCE(`affiliate_name`,''),'-',COALESCE(`model`,''),'-',COALESCE(`ip`,''),'-',COALESCE(`os_type`,''),'-',COALESCE(`os_version`,'')) AS device_name
FROM devices
...
App Inventor 2 串口调试 App 全方案技术调研 - App应用开发 - 清泛IT社区，为创新赋能！
...256）
- IsOpen / IsInitialized 状态属性
局限性：
- 不支持端口选择（自动打开第一个 USB 设备）
- 不支持数据位/停止位/校验位设置
- 无事件回调（需 Clock 轮询读取）
- 仅文本模式，二进制支持较弱
- 不支持 PL2303 芯片
二...
Detecting a mobile browser
...() just to put the more common cases first and let early bailout save some extra processing?
– Rob_vH
Mar 12 '15 at 14:33
2
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Solving a “communications link failure” with JDBC and MySQL [duplicate]
... connecting to the server. Maybe the problem is because of the wrong query string or too many connections to the database.
So I suggest you to try all the solutions one by one and don't give up!
Here are the solutions that I found on the internet and for each of them, there is at least on person w...
How do I fix the error 'Named Pipes Provider, error 40 - Could not open a connection to' SQL Server'
...
Solved my issue. Working connection string: Server=MyServerName\DOLPHIN=Trusted_Connection=True;Database=DolphinPlatform While in development (C#) I was connecting to a locally installed MSSQL 2017 server, but when I went to deploy it, the remote server install...
Get city name using geolocation
...
For V3, the {'latlng':latlng} string should be changed to 'location', as in ...geocode({'location':latlng}). This example got me almost there, but the 'latlng' string no longer seems to be valid in newer apis. See: developers.google.com/maps/documentati...
how to detect search engine bots with php?
...
Check the $_SERVER['HTTP_USER_AGENT'] for some of the strings listed here:
http://www.useragentstring.com/pages/useragentstring.php
Or more specifically for crawlers:
http://www.useragentstring.com/pages/useragentstring.php?typ=Crawler
If you want to -say- log the number of ...