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Django rest framework nested self-referential objects
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70
Instead of using ManyRelatedField, use a nested serializer as your field:
class SubCategorySeri...
PHP + MySQL transactions examples
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answered Apr 25 '10 at 12:49
Pascal MARTINPascal MARTIN
366k6767 gold badges624624 silver badges641641 bronze badges
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Can table columns with a Foreign Key be NULL?
... INTO child (id, parent_id) VALUES (1, NULL);
-- Query OK, 1 row affected (0.01 sec)
INSERT INTO child (id, parent_id) VALUES (2, 1);
-- ERROR 1452 (23000): Cannot add or update a child row: a foreign key
-- constraint fails (`t/child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY
-- (`parent_id`) REFE...
Mysql order by specific ID values
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203
You can use ORDER BY and FIELD function.
See http://lists.mysql.com/mysql/209784
SELECT * FROM...
Twitter Bootstrap - how to center elements horizontally or vertically
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Update: while this answer was likely correct back in early 2013, it should not be used anymore. The proper solution uses offsets.
As for other users suggestion there are also native bootstrap classes available like:
class="text-center"
class="pagination-centered"
thanks to @Henn...
Checking length of dictionary object [duplicate]
...what I needed! Cheers
– Gesias
Mar 30 '13 at 7:00
12
FYI for the others still supporting IE8: No ...
Vertically centering Bootstrap modal window
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This does the job : http://jsfiddle.net/sRmLV/1140/
It uses a helper-div and some custom css. No javascript or jQuery required.
HTML (based on Bootstrap's demo-code)
<button class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal">Launch demo modal...
Python Linked List
...lambda lst, el: cons(el, lst), reversed(args), None)
car = lambda lst: lst[0] if lst else lst
cdr = lambda lst: lst[1] if lst else lst
nth = lambda n, lst: nth(n-1, cdr(lst)) if n > 0 else car(lst)
length = lambda lst, count=0: length(cdr(lst), count+1) if lst else count
begin = lambda *args: ...
Using column alias in WHERE clause of MySQL query produces an error
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440
You can only use column aliases in GROUP BY, ORDER BY, or HAVING clauses.
Standard SQL doesn...
Split value from one field to two
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edited Aug 31 '16 at 10:07
joshweir
3,86422 gold badges2727 silver badges4545 bronze badges
answered...