大约有 42,000 项符合查询结果（耗时：0.0441秒） [XML]
How to reset a single table in rails?
...
In case anyone tried this and got an error, I did ActiveRecord::Base.connection.execute("DELETE from 'yourtablename'") and it worked because it would give me an error that said sqlite_sequence where name = 'yourtablename' is not a valid table name or something like that.
...
Populating a razor dropdownlist from a List in MVC
...o your view has cleaner separation.
First create a viewmodel to store the Id the user will select along with a list of items that will appear in the DropDown.
ViewModel:
public class UserRoleViewModel
{
// Display Attribute will appear in the Html.LabelFor
[Display(Name = "User Role")]
...
What is causing this ActiveRecord::ReadOnlyRecord error?
... the :include is helpful in reducing the # of queries done, I didn't know about that; but I tried to fix it by changing the Tableau/Deckcards association to a has_many: through, and now I'm getting a 'could not find association' msg; I may have to post another question for that
...
How to set margin of ImageView using code, not xml
...
android.view.ViewGroup.MarginLayoutParams has a method setMargins(left, top, right, bottom). Direct subclasses are: FrameLayout.LayoutParams, LinearLayout.LayoutParams and RelativeLayout.LayoutParams.
Using e.g. LinearLayout:
Li...
JSON Array iteration in Android/Java
I am building an android app that needs to download and synchronise with an online database, I am sending my query from the app to a php page which returns the relevant rows from a database in JSON format.
...
PDO support for multiple queries (PDO_MYSQL, PDO_MYSQLND)
...PDO::ATTR_EMULATE_PREPARES is set to 1 (default). Alternatively you can avoid using prepared statements and use $pdo->exec directly.
Using exec
$db = new PDO("mysql:host=localhost;dbname=test", 'root', '');
// works regardless of statements emulation
$db->setAttribute(PDO::ATTR_EMULATE_PREPA...
Empty set literal?
...
Why?! Performance is almost identical: $ python3.7 -m timeit 'set()' 2000000 loops, best of 5: 177 nsec per loop $ python3.7 -m timeit '{*()}' 2000000 loops, best of 5: 171 nsec per loop
– ogurets
Mar 3...
RESTful Authentication via Spring
...edentials (user/pass combo) with each request is not desirable. Per REST guidelines (and internal business requirements), the server must remain stateless. The API will be consumed by another server in a mashup-style approach.
...
How to export all data from table to an insertable sql format?
... another (which might or might not have similar design).
If you dont have identity column in table B_table:
INSERT INTO A_db.dbo.A_table
SELECT * FROM B_db.dbo.B_table
If you have identity column in table B_table, you have to specify columns to insert. Basically you select all except identity co...
Trigger change() event when setting 's value with val() function
...n(){
if($('#selectField').val() == 'N'){
$('#secondaryInput').hide();
} else {
$('#secondaryInput').show();
}
});
Then I take the value from the database (this is used on a form for both new input and editing existing records), set it as the selected value, and add the piec...