I have written a couple queries in SQL, and I request assistance
in translating them into SQL Alchemy.
The first query concerns the mail filtering algorithm for a mail user
agent. I want to run something like this SQL.
select mailfiling.manual_folder_id
from mail
natural join mailfiling
join emailaddress on emailaddress.id = mail.sender_id
where emailaddress.id in (7, 12)
group by emailaddress.id, mailfiling.manual_folder_id
order by count(*) desc limit 1;
Here are the relevant SQLAlchemy models.
https://thomaslevine.com/scm/pgmh/artifact/e278d413b3dd7661
I would probably use it as hybrid_property or a column_property
in the Mail class, returning the folder associated with a particular
mail.
The second query concerns the search index for the same mail user agent.
How do I assign the result of SQL functions? This SQL does what I want.
create table test (t tsvector);
insert into test (t) values (
setweight(to_tsvector('english', 'Thomas Levine'), 'A') ||
setweight(to_tsvector('english', 'blah blah'), 'B')
);
I would use it in the initialization of the Mail model from the same
file as above.
--
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The Python SQL Toolkit and Object Relational Mapper
http://www.sqlalchemy.org/
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