If you have an SQLAlchemy session, you would write this:
session.query(Model.array[1]).all()
Assuming your "Model.query" is a shorthand for "session.query(Model)",
you might be able to use:
Model.query.with_entities(Model.array[1]).all()
Simon
On Tue, Nov 8, 2016 at 10:12 AM, Dorian Hoxha <dorian.ho...@gmail.com> wrote:
> Hi Simon,
>
> It all works. All I need is how to do:
>
> Model.query.options(load_only(Model.array[1])).all() ?
>
>
> Thanks
>
>
> On Tue, Nov 8, 2016 at 10:56 AM, Simon King <si...@simonking.org.uk> wrote:
>>
>> On Tue, Nov 8, 2016 at 9:31 AM, Dorian Hoxha <dorian.ho...@gmail.com>
>> wrote:
>> > So,
>> >
>> > I want to do "SELECT array[1] FROM table;". Meaning to select only 1
>> > element. Is this possible (didn't find by searching
>> > docs,mailing-list,google).
>> > Though I can do it by normal query.
>> >
>>
>> I haven't used arrays with postgresql, so I've no idea if this works,
>> but for documentation you probably want to start here:
>>
>>
>> http://docs.sqlalchemy.org/en/latest/core/type_basics.html#sqlalchemy.types.ARRAY
>>
>> According to those docs, if you've declared a table with a column
>> using the ARRAY type, you should be able to query elements of the
>> array using python indexing operators. For example:
>>
>> table = sa.Table('mytable', metadata, sa.Column('array',
>> sa.ARRAY(sa.Integer)))
>> sa.select([table.c.array[1]])
>>
>> Hope that helps,
>>
>> Simon
>>
>> --
>> SQLAlchemy -
>> The Python SQL Toolkit and Object Relational Mapper
>>
>> http://www.sqlalchemy.org/
>>
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>
> http://www.sqlalchemy.org/
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SQLAlchemy -
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http://www.sqlalchemy.org/
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