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Difference between Django's annotate and aggregate methods?
...jects.annotate(num_authors=Count('authors'))
>>> q[0].num_authors
2
>>> q[1].num_authors
1
q is the queryset of books, but each book has been annotated with the number of authors.
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Rails nested form with has_many :through, how to edit attributes of join model?
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ArcolyeArcolye
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Convert JSON style properties names to Java CamelCase names with GSON
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answered Aug 4 '12 at 16:26
HampeiHampei
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How Do I Convert an Integer to a String in Excel VBA?
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265
CStr(45) is all you need (the Convert String function)
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In absence of preprocessor macros, is there a way to define practical scheme specific flags at proje
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472
In Swift you can still use the "#if/#else/#endif" preprocessor macros (although more constrained...
How to generate a range of numbers between two numbers?
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28 Answers
28
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What does flushing the buffer mean?
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123
Consider writing to a file. This is an expensive operation. If in your code you write one byte ...
What does the double colon (::) mean in CSS?
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112
It means pseudo element selector. It means the element to the right doesn't exist in the normal ...
Update or Insert (multiple rows and columns) from subquery in PostgreSQL
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For the UPDATE
Use:
UPDATE table1
SET col1 = othertable.col2,
col2 = othertable.col3
FROM othertable
WHERE othertable.col1 = 123;
For the INSERT
Use:
INSERT INTO table1 (col1, col2)
SELECT col1, col2
FROM othertable
You don't need the VALUES syntax if you are us...
C++ where to initialize static const
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edited Apr 9 '10 at 12:18
answered Apr 9 '10 at 6:48
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