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Flask SQLAlchemy query, specify column names
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An example here:
movies = Movie.query.filter(Movie.rating != 0).order_by(desc(Movie.rating)).all()
I query the db for movies with rating <> 0, and then I order them by rating with the higest rating first.
Take a look here: Select, Insert, Delete in Flask-SQLAlchemy
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How to overload std::swap()
...Abrahams: If you specialize (without explicit template arguments), partial ordering will cause it to be a specialization of the vector version and it will be used.
– Davis Herring
Mar 13 '18 at 13:54
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How can you do paging with NHibernate?
...ed to execute a separate transaction for retrieving the total row count in order to render your pager.
– Kevin Pang
Jan 7 '09 at 0:44
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Using column alias in WHERE clause of MySQL query produces an error
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You can only use column aliases in GROUP BY, ORDER BY, or HAVING clauses.
Standard SQL doesn't allow you to
refer to a column alias in a WHERE
clause. This restriction is imposed
because when the WHERE code is
executed, the column value may not yet
be dete...
JPA eager fetch does not join
...loading when constructing a customer class with a collection for customer orders. If you retrieved every order for a customer when you wanted to get a customer list this may be a expensive database operation when you only looking for customer name and contact details. Best to leave the db access ti...
Fastest way to get the first object from a queryset in django?
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also, first() and last() enforce an ORDER BY clause on a query. It will make the results deterministic but will most probably slow the query down.
– Phil Krylov
Jun 27 '17 at 19:24
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How exactly does __attribute__((constructor)) work?
...that code in .init is run before .ctors and code in .fini after .dtors. If order is relevant that's at least one crude but easy way to distinguish between init/exit functions.
A major drawback is that you can't easily have more than one _init and one _fini function per each loadable module and woul...
how to put focus on TextBox when the form load?
... not. Not sure why Tab Index = 0 won't work but there are probably strange order of operations going on while loading the form/showing dialog.
– David Carrigan
Sep 16 '15 at 18:07
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trying to animate a constraint in swift
....3, according to your needs, you may choose one of the 3 following ways in order to solve your problem.
#1. Using UIView's animate(withDuration:animations:) class method
animate(withDuration:animations:) has the following declaration:
Animate changes to one or more views using the specified ...
How do I see active SQL Server connections?
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I like to ORDER BY 1, 2 DESC, 3
– slartidan
Jul 10 '19 at 14:56
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