大约有 44,000 项符合查询结果（耗时：0.0461秒） [XML]
find() with nil when there are no records
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Yes, just do:
Challenge.find_by_id(10)
For Rails 4 and 5:
Challenge.find_by(id: 10)
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What are sessions? How do they work?
...y to store user data between HTTP requests.
Cookies or URL parameters ( for ex. like http://example.com/myPage?asd=lol&boo=no ) are both suitable ways to transport data between 2 or more request.
However they are not good in case you don't want that data to be readable/editable on client side...
How to dismiss notification after action has been clicked
...r intent which gets started when your action is pressed. With that extra information, you can check in the starting activity whether it was started via a notifcation action.
– endowzoner
Dec 19 '12 at 8:43
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Django select only rows with duplicate field values
... .filter(id__count__gt=1)
Literal.objects.filter(name__in=[item['name'] for item in dupes])
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Map enum in JPA with fixed values?
I'm looking for the different ways to map an enum using JPA. I especially want to set the integer value of each enum entry and to save only the integer value.
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Get checkbox value in jQuery
...is:
$("input[type='checkbox']").val();
Or if you have set a class or id for it, you can:
$('#check_id').val();
$('.check_class').val();
However this will return the same value whether it is checked or not, this can be confusing as it is different to the submitted form behaviour.
To check whet...
Javascript - remove an array item by value [duplicate]
...y.indexOf(id_tag);
if ( ~position ) tag_story.splice(position, 1);
P.S. For an explanation of that cool ~ tilde shortcut, see this post:
Using a ~ tilde with indexOf to check for the existence of an item in an array.
Note: IE < 9 does not support .indexOf() on arrays. If you want to make s...
Cannot insert explicit value for identity column in table 'table' when IDENTITY_INSERT is set to OFF
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You're inserting values for OperationId that is an identity column.
You can turn on identity insert on the table like this so that you can specify your own identity values.
SET IDENTITY_INSERT Table1 ON
INSERT INTO Table1
/*Note the column list i...
Should I use PATCH or PUT in my REST API?
I want to design my rest endpoint with the appropriate method for the following scenario.
6 Answers
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MongoDB: Combine data from multiple collections into one..how?
...You need to have some key in both collections that you can use as an _id.
For example, let's say you have a users collection and a comments collection and you want to have a new collection that has some user demographic info for each comment.
Let's say the users collection has the following fields...