大约有 49,000 项符合查询结果（耗时：0.0694秒） [XML]
Laravel Schema onDelete set null
...
If you want to set null on delete:
$table->...->onDelete('set null');
First make sure you set the foreign key field as nullable:
$table->integer('foreign_id')->unsigned()->nullable();
...
Why does PostgreSQL perform sequential scan on indexed column?
...
If the SELECT returns more than approximately 5-10% of all rows in the table, a sequential scan is much faster than an index scan.
This is because an index scan requires several IO operations for each row (look up the row ...
Basic HTTP and Bearer Token Authentication
... -H "Authorization: Bearer mytoken123"
^^^^^^^^^^^^^^^^^^
If above one doesn't work, then you have nothing to do with it. So try the following alternates.
You can pass the token under another name. Because you are handling the authorization from your Application. So you can easily ...
wpf: how to show tooltip when button disabled by command?
...nsures that for any class inheriting from Control, tooltips are shown even if Control instance is disabled
– sacha barber
Jan 22 '19 at 18:24
...
Tracking Google Analytics Page Views with AngularJS
...
If you're using ng-view in your Angular app you can listen for the $viewContentLoaded event and push a tracking event to Google Analytics.
Assuming you've set up your tracking code in your main index.html file with a name of...
git ignore all files of a certain type, except those in a specific subfolder
...tching file excluded by
a previous pattern will become
included again. If a negated pattern
matches, this will override lower
precedence patterns sources.
http://schacon.github.com/git/gitignore.html
*.json
!spec/*.json
...
How to keep/exclude a particular package path when using proguard?
...
You don't specify in what way it doesn't work. Your configuration keeps the names of all public classes in the specified package:
-keep public class com.myapp.customcomponents.*
The following configuration keeps the names of all public ...
Confused about __str__ on list in Python [duplicate]
...
Python has two different ways to convert an object to a string: str() and repr(). Printing an object uses str(); printing a list containing an object uses str() for the list itself, but the implementation of list.__str__() calls repr() for ...
List of Java class file format major version numbers?
...
These come from the class version. If you try to load something compiled for java 6 in a java 5 runtime you'll get the error, incompatible class version, got 50, expected 49. Or something like that.
See here in byte offset 7 for more info.
Additional info c...
How do I use an INSERT statement's OUTPUT clause to get the identity value?
If I have an insert statement such as:
1 Answer
1
...