大约有 40,000 项符合查询结果（耗时：0.0397秒） [XML]
find vs find_by vs where
...its your needs best.
The find method is usually used to retrieve a row by ID:
Model.find(1)
It's worth noting that find will throw an exception if the item is not found by the attribute that you supply. Use where (as described below, which will return an empty array if the attribute is not foun...
How to handle anchor hash linking in AngularJS
...call it in your controller, and it will scroll you to any element with the id found in $location.hash()
app.controller('TestCtrl', function($scope, $location, $anchorScroll) {
$scope.scrollTo = function(id) {
$location.hash(id);
$anchorScroll();
}
});
<a ng-click="scrollTo('fo...
Nested JSON objects - do I have to use arrays for everything?
...rite JSON like this:
{
"stuff": {
"onetype": [
{"id":1,"name":"John Doe"},
{"id":2,"name":"Don Joeh"}
],
"othertype": {"id":2,"company":"ACME"}
},
"otherstuff": {
"thing": [[1,42],[2,2]]
}
}
You can use it like this:
obj....
Unable to open project… cannot be opened because the project file cannot be parsed
... THANK YOU. This works. In my case it wasn't ".mine" or ".r" but said something else... Ctrl-F for "===" to find the place.
– ck_
Oct 31 '12 at 17:22
...
How to generate random SHA1 hash to use as ID in node.js?
I am using this line to generate a sha1 id for node.js:
4 Answers
4
...
What does Html.HiddenFor do?
Although I have read the documentation on Html.HiddenFor, I've not grasped what is it used for...
4 Answers
...
Multiple actions were found that match the request in Web Api
...outes.MapHttpRoute(
name: "API Default",
routeTemplate: "api/{controller}/{id}",
defaults: new { id = RouteParameter.Optional });
But in order to have multiple actions with the same http method you need to provide webapi with more information via the route like so:
routes.MapHttpRoute(
name: "API...
How to set auto increment primary key in PostgreSQL?
...oobars','2012-05-01')
insert into epictable(moobars,foobars) values('worldwide interblag','2012-05-02')
Step 3, select * from your table:
el@voyager$ psql -U pgadmin -d kurz_prod -c "select * from epictable"
Step 4, interpret the output:
mytable_key | moobars | foobars
-----...
SQL Server Output Clause into a scalar variable
...
You need a table variable and it can be this simple.
declare @ID table (ID int)
insert into MyTable2(ID)
output inserted.ID into @ID
values (1)
share
|
improve this answer
|
...
T-SQL: Deleting all duplicate rows but keeping one [duplicate]
...
You didn't say what version you were using, but in SQL 2005 and above, you can use a common table expression with the OVER Clause. It goes a little something like this:
WITH cte AS (
SELECT[foo], [bar],
row_number() OVER...