大约有 40,000 项符合查询结果（耗时：0.0466秒） [XML]
Rails where condition using NOT NIL
...
The canonical way to do this with Rails 3:
Foo.includes(:bar).where("bars.id IS NOT NULL")
ActiveRecord 4.0 and above adds where.not so you can do this:
Foo.includes(:bar).where.not('bars.id' => nil)
Foo.includes(:bar).where.not(bars: { id: nil })
When working...
Remove json element
...
Where's foo in the test data? Well, the first line is actually pseudocode. Instead of json = {...}, it would be something like json = {foo: 'value'}
– aharris88
Mar 20 '14 at 23:38
...
Difference between a user and a schema in Oracle?
...Tom
You should consider a schema to be the user account and collection of all objects therein
as a schema for all intents and purposes.
SCOTT is a schema that includes the EMP, DEPT and BONUS tables with various grants, and
other stuff.
SYS is a schema that includes tons of tables, views, grant...
ReadOnlyCollection or IEnumerable for exposing member collections?
...pe to be an immutable collection, and then expose that directly - assuming Foo itself is immutable, of course.
Updated answer to address the question more directly
Is there any reason to expose an internal collection as a ReadOnlyCollection rather than an IEnumerable if the calling code only it...
Debug code-first Entity Framework migration codes
....
If you, like me, some times have problems in the Seed() method what I usually do is simply create a public method that calls the Protect Seed().
public void SeedDebug(AppDbContext context)
{
Seed(context);
}
then in my HomeController I call this method in Debug mode.
public class HomeContr...
jQuery's .click - pass parameters to user function
... the following example:
function myHandler( event ) {
alert( event.data.foo );
}
$( "p" ).on( "click", { foo: "bar" }, myHandler );
share
|
improve this answer
|
follow
...
How to add display:inline-block in a jQuery show() function?
...
I would take it a step further and take care of all the hiding/showing using CSS classes, not jQuery. $('.tab-content').addClass('hidden'); (...) $('#' + id).removeClass('hidden'); In the CSS: .hidden { display: none !important }
– Joe Maffei
...
Why does the C# compiler not fault code where a static method calls an instance method?
The following code has a static method, Foo() , calling an instance method, Bar() :
3 Answers
...
How do I get the last inserted ID of a MySQL table in PHP?
...s the last id inserted in the current connection
mysql_query('INSERT INTO FOO(a) VALUES(\'b\')');
$id = mysql_insert_id();
plus using max is a bad idea because it could lead to problems if your code is used at same time in two different sessions.
That function is called mysql_insert_id
...
How to call a method defined in an AngularJS directive?
...="MainCtrl">
<button ng-click="focusinControl.takeTablet()">Call directive function</button>
<p>
<b>In controller scope:</b>
{{focusinControl}}
</p>
<p>
<b>In directive scope:</b>
<focusin con...