On Fri, Jun 23, 2023, at 9:38 AM, Julien Cigar wrote:
> On Fri, Jun 23, 2023 at 09:29:27AM -0400, Mike Bayer wrote:
>>
>> Hi Julien -
>
> Hi Mike,
>
>>
>> OK, if we're going to do one of your big queries, can we please start fresh,
>> make a new discussion at
>> https://github.com/sqlalchemy/sqlalchemy/discussions , give me **really
>> really succinct** models + the query you want, etc.
>>
>> the google groups thing here is not exactly going away but it's an
>> antiquated interface at this point.
>>
>
> I think you missed one message, I added nesting=True to the cte()
> expression and it does what I want :)
hooray! onto the weekend then
>
> Next time I'll use https://github.com/sqlalchemy/sqlalchemy/discussions
>
> Thanks!
>
> Julien
>
>>
>>
>> On Fri, Jun 23, 2023, at 4:48 AM, Julien Cigar wrote:
>> > On Wed, Jun 21, 2023 at 08:35:36AM -0400, Mike Bayer wrote:
>> >>
>> >>
>> >>
>> >> On Wed, Jun 21, 2023, at 5:12 AM, Julien Cigar wrote:
>> >> > Hello,
>> >> >
>> >> > I'm trying to add a column_property to recursively load and merge some
>> >> > json column.
>> >> >
>> >> > I have the following:
>> >> > https://gist.github.com/silenius/1af1072abae5829f54584f1ea554e074 but I
>> >> > cannot figure how can I replace the '5011' at line 11 (which is the
>> >> > object primary key) with the "current" involved objet..?
>> >> >
>> >> > For example when I'm doing dbsession.get(MyClass, 1234) I cannot figure
>> >> > how reference the id in the column_property query
>> >>
>> >> well you wouldnt hardcode the id like that, you'd need to make your query
>> >> correlated to the parent.
>> >>
>> >> so it would select() from "ac" where "ac" is "aliased(class_)" , then
>> >> correlate to the class
>> >>
>> >>
>> >> .where(
>> >> class_.id == ac.id
>> >> ).
>> >
>> > Thank you Mike, it _almost_ work.
>> > With (1) SQLAlchemy now generates (2). I'm still getting an error:
>> >
>> > sqlalchemy.exc.ProgrammingError: (psycopg2.errors.UndefinedTable)
>> > invalid reference to FROM-clause entry for table "content"
>> > LINE 4: WHERE content_1.id = content.id UNION ALL SELECT content.id ...
>> > ^
>> > HINT: Perhaps you meant to reference the table alias "content_1".
>> >
>> > This is because the WITH statement appears at the "top" rather than a
>> > subselect (and cannot reference the outer table)
>> >
>> > Any idea how could I transform (1) to generate (3) rather than (2) ?
>> >
>> > (1) https://gist.github.com/silenius/43717848057d87ef7945c4d621fce5e8
>> > (2) https://gist.github.com/silenius/34d3a319a52f8fe4fcd2b6418ca9e927
>> > (3) https://gist.github.com/silenius/6d048f2b7819d39b70cc4d77237f9031
>> >
>> > Thanks a lot!
>> >
>> > Julien
>> >
>> >>
>> >>
>> >> as far as how that integrates into the CTE and all that you'd have to
>> >> arrange the geometry of the SELECT to work out correctly, I would start
>> >> with something very simple and build outwards.
>> >>
>> >> correlated subquery column_property at
>> >> https://docs.sqlalchemy.org/en/20/orm/mapped_sql_expr.html#using-column-property
>> >>
>> >> --
>> >> SQLAlchemy -
>> >> The Python SQL Toolkit and Object Relational Mapper
>> >>
>> >> http://www.sqlalchemy.org/
>> >>
>> >> To post example code, please provide an MCVE: Minimal, Complete, and
>> >> Verifiable Example. See http://stackoverflow.com/help/mcve for a full
>> >> description.
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>> >
>> > --
>> > Julien Cigar
>> > Belgian Biodiversity Platform (http://www.biodiversity.be)
>> > PGP fingerprint: EEF9 F697 4B68 D275 7B11 6A25 B2BB 3710 A204 23C0
>> > No trees were killed in the creation of this message.
>> > However, many electrons were terribly inconvenienced.
>> >
>> > --
>> > SQLAlchemy -
>> > The Python SQL Toolkit and Object Relational Mapper
>> >
>> > http://www.sqlalchemy.org/
>> >
>> > To post example code, please provide an MCVE: Minimal, Complete, and
>> > Verifiable Example. See http://stackoverflow.com/help/mcve for a full
>> > description.
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>> --
>> SQLAlchemy -
>> The Python SQL Toolkit and Object Relational Mapper
>>
>> http://www.sqlalchemy.org/
>>
>> To post example code, please provide an MCVE: Minimal, Complete, and
>> Verifiable Example. See http://stackoverflow.com/help/mcve for a full
>> description.
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>
> --
> Julien Cigar
> Belgian Biodiversity Platform (http://www.biodiversity.be)
> PGP fingerprint: EEF9 F697 4B68 D275 7B11 6A25 B2BB 3710 A204 23C0
> No trees were killed in the creation of this message.
> However, many electrons were terribly inconvenienced.
>
> --
> SQLAlchemy -
> The Python SQL Toolkit and Object Relational Mapper
>
> http://www.sqlalchemy.org/
>
> To post example code, please provide an MCVE: Minimal, Complete, and
> Verifiable Example. See http://stackoverflow.com/help/mcve for a full
> description.
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The Python SQL Toolkit and Object Relational Mapper
http://www.sqlalchemy.org/
To post example code, please provide an MCVE: Minimal, Complete, and Verifiable
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