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Can “list_display” in a Django ModelAdmin display attributes of ForeignKey fields?
I have a Person model that has a foreign key relationship to Book , which has a number of fields, but I'm most concerned about author (a standard CharField).
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What is the best way to tell if a character is a letter or number in Java without using regexes?
What is the best and/or easiest way to recognize if a string.charAt(index) is an A-z letter or a number in Java without using regular expressions? Thanks.
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Converting Storyboard from iPhone to iPad
...ryboard
Close Xcode and then open this file any text editor.
Search for targetRuntime="iOS.CocoaTouch"and change it to targetRuntime="iOS.CocoaTouch.iPad"
Change the code in the MainStoryboard_iPad.storyboard from:
<simulatedScreenMetrics key="destination" type="retina4"/> to
<simulatedS...
简单谈谈软件配置管理 - 项目管理 - 清泛网 - 专注C/C++及内核技术
简单谈谈软件配置管理一、概述 配置管理（Configuration Management， CM）的目的，在使用配置识别、配置控制、配置状态记录及配置审计，来达到建立与维护 一、概述
配置管理（Configuration Management， CM）的目的，在使用配置...
How to change string into QString?
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If by string you mean std::string you can do it with this method:
QString QString::fromStdString(const std::string & str)
std::string str = "Hello world";
QString qstr = QString::fromStdString(str);
If by string you mean Ascii...
How to get the body's content of an iframe in Javascript?
What I want to get is:
9 Answers
9
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How to save a Python interactive session?
I find myself frequently using Python's interpreter to work with databases, files, etc -- basically a lot of manual formatting of semi-structured data. I don't properly save and clean up the useful bits as often as I would like. Is there a way to save my input into the shell (db connections, varia...
MySQL SELECT only not null values
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You should use IS NOT NULL. (The comparison operators = and <> both give UNKNOWN with NULL on either side of the expression.)
SELECT *
FROM table
WHERE YourColumn IS NOT NULL;
Just for completeness I'll mention that in MySQL you can also negate the null safe equality operator bu...
How to use Python's pip to download and keep the zipped files for a package?
If I want to use the pip command to download a package (and its dependencies), but keep all of the zipped files that get downloaded (say, django-socialregistration.tar.gz) - is there a way to do that?
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How do I create a foreign key in SQL Server?
I have never "hand-coded" object creation code for SQL Server and foreign key decleration is seemingly different between SQL Server and Postgres. Here is my sql so far:
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