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How do I execute inserts and updates in an Alembic upgrade script?
...ly straightforward to adapt this to the other forms.
Note that Alembic provides some basic data functions: op.bulk_insert() and op.execute(). If the operations are fairly minimal, use those. If the migration requires relationships or other complex interactions, I prefer to use the full power of mo...
How to get Core Data object from specific Object ID?
I can easily get an object's ID in Core Data using the following code:
3 Answers
3
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Why do we need tuples in Python (or any immutable data type)?
...
@musicfreak, see the edit I just did where building a tuple is over 7.6 times faster than building the equivalent list -- now you can't say you've "never seen a noticeable difference" any more, unless your definition of "noticeable" is truly peculiar...
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How to delete cookies on an ASP.NET website
...
Try something like that:
if (Request.Cookies["userId"] != null)
{
Response.Cookies["userId"].Expires = DateTime.Now.AddDays(-1);
}
But it also makes sense to use
Session.Abandon();
besides in many scenarios.
...
How do I determine the size of an object in Python?
...s to define
a value which will be returned if the
object type does not provide means to
retrieve the size and would cause a
TypeError.
getsizeof calls the object’s
__sizeof__ method and adds an additional garbage collector overhead
if the object is managed by the
garbage collector.
See recursive s...
Return 0 if field is null in MySQL
...(SELECT SUM(uop.price * uop.qty) FROM uc_order_products uop WHERE uo.order_id = uop.order_id) AS products_subtotal, 0)?
– Kevin
Oct 22 '10 at 13:46
2
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querySelector, wildcard element match?
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[id^='someId'] will match all ids starting with someId.
[id$='someId'] will match all ids ending with someId.
[id*='someId'] will match all ids containing someId.
If you're looking for the name attribute just substitute id ...
ERROR: permission denied for sequence cities_id_seq using Postgres
...ce PostgreSQL 8.2 you have to use:
GRANT USAGE, SELECT ON SEQUENCE cities_id_seq TO www;
GRANT USAGE - For sequences, this privilege allows the use of the currval and nextval functions.
Also as pointed out by @epic_fil in the comments you can grant permissions to all the sequences in the schema ...
How to pass an array into a SQL Server stored procedure
...irst, in your database, create the following two objects:
CREATE TYPE dbo.IDList
AS TABLE
(
ID INT
);
GO
CREATE PROCEDURE dbo.DoSomethingWithEmployees
@List AS dbo.IDList READONLY
AS
BEGIN
SET NOCOUNT ON;
SELECT ID FROM @List;
END
GO
Now in your C# code:
// Obtain your list of ids to ...
What do querySelectorAll and getElementsBy* methods return?
...etElementsByTagName and querySelectorAll ) work the same as getElementById or do they return an array of elements?
10 A...