大约有 15,640 项符合查询结果（耗时：0.0301秒） [XML]
The ALTER TABLE statement conflicted with the FOREIGN KEY constraint
...you've deleted some old customers, but not their orders, you will get this error if you decide to make a foreign key from Orders.CustomerId to Customers.Id. Some orders don't have a corresponding customer any more, so it is impossible to add the foreign key.
– Chad Hedgcock
...
Installing specific package versions with pip
...r to this question - thanks for your help. Hitting a different issue now: "error: command '/usr/bin/gcc-4.2' failed with exit status 1" while building '_mysql' extension. I know that I have GCC, and the install for MySQL_python 1.2.3 goes smoothly. Have others seen this issue, specifically with 1.2....
How do I remove documents using Node.js Mongoose?
...ssage.type = 'notification!';
}
else {
message.type = 'error';
}
});
UPDATE:
As of mongoose 3.8.1, there are several methods that lets you remove directly a document, say:
remove
findByIdAndRemove
findOneAndRemove
Refer to mongoose API docs for further information.
...
PHP cURL not working - WAMP on Windows 7 64 bit
...HP version 5.3.1 with Apache 2.2.9 worked...
I was getting the consistent error of missing php5.dll. For this, I renamed all the old php.ini files which are not required (outside of the WAMP folder) to old_ohp.ini.
share
...
How to implement history.back() in angular.js
...s useful... I was hitting the "10 $digest() iterations reached. Aborting!" error when using $window.history.back(); with IE9 (works fine in other browsers of course).
I got it to work by using:
setTimeout(function() {
$window.history.back();
},100);
...
Using Node.js only vs. using Node.js with Apache/Nginx
...t Sergeant mentioned in his answer, you can more easily display meaningful error pages or fall back onto a static site if your node service crashes. Otherwise users may just get a timed out connection.
Running another web server in front of Node may help to mitigate security flaws and DoS attacks ag...
Covariance and contravariance real world example
...iantly as a mammal hat…
IHat<Mammal> mHat = rHat; // Compiler error
// …because…
mHat.hide(new Dolphin()); // Hide a dolphin in a rabbit hat??
// It also cannot be treated contravariantly as a cottontail hat…
IHat<CottonTail> cHat = rHat; // Compiler error
// …becau...
Testing whether a value is odd or even
...one outside the isEven and isOdd functions, so you don't have to duplicate error handling in both functions.
share
|
improve this answer
|
follow
|
...
Compiling problems: cannot find crt1.o
... On Ubuntu this worked sudo apt-get install gcc-multilib and it fixed my error from gfortran -m32 ...
– randwa1k
Sep 10 '14 at 1:11
1
...
Git repository broken after computer died
...ld not do anything.
After doing git fsck mentioned that the branch had an error: Invalid HEAD.
refs/heads/<branch> had an invalid sha1 pointer.
Upon following the options here, I opened .git/refs/heads/<branch> in an notepad++ editor, and each of the sha1 characters were NUL.
Fortunat...