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HTML.ActionLink method
... What's strange is if you miss out the last parameter, it appends for me ?Length=8 to the current action
– Chris S
Aug 19 '09 at 10:22
32
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Django database query: How to get object by id?
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If you want to get an object, using get() is more straightforward:
obj = Class.objects.get(pk=this_object_id)
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Check if PHP session has already started
... session and sometimes from a page that doesn't have session started. Therefore when I have session_start() on this script I sometimes get the error message for "session already started". For that I've put these lines:
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How to break a line of chained methods in Python?
I have a line of the following code (don't blame for naming conventions, they are not mine):
8 Answers
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Send message to specific client with socket.io and node.js
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Well you have to grab the client for that (surprise), you can either go the simple way:
var io = io.listen(server);
io.clients[sessionID].send()
Which may break, I doubt it, but it's always a possibility that io.clients might get changed, so use the above...
How do you check if a certain index exists in a table?
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You can do it using a straight forward select like this:
SELECT *
FROM sys.indexes
WHERE name='YourIndexName' AND object_id = OBJECT_ID('Schema.YourTableName')
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How to set initial value and auto increment in MySQL?
How do I set the initial value for an "id" column in a MySQL table that start from 1001?
10 Answers
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How to implement has_many :through relationships with Mongoid and mongodb?
...ld model that differently in MongoDB using a field containing an array of 'foreign' keys on either side. For example:
class Physician
include Mongoid::Document
has_and_belongs_to_many :patients
end
class Patient
include Mongoid::Document
has_and_belongs_to_many :physicians
end
In other w...
How to continue a Docker container which has exited
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For those new to Linux, the `docker ps -q -l` bit is an expansion. It will be replaced with the id of the last (-l) docker container created. -q merely suppresses other info (bedsides the id) usually output by `docker ps`....
SQL UPDATE SET one column to be equal to a value in a related table referenced by a different column
...s you might want
I recommend to check what the result set to update is before running the update (same query, just with a select):
select *
from QuestionTrackings q
inner join QuestionAnswers a
on q.AnswerID = a.AnswerID
where q.QuestionID is null -- and other conditions you might want
Particul...