I have a query where I derive an object based on some dynamic filters on a
relationship:
sql_ors = [
sqlalchemy.func.lower(Bar.string_id) == id_search.lower(),
sqlalchemy.func.lower(Bar.numeric_id) == id_search.lower(),
]
query = dbSession.query(Foo)\
.join(Bar,
Foo.bar_id == Bar.id
)\
.filter(
Foo.bash.op('IS')(True),
sqlalchemy.sql.expression.or_(*sql_ors),
)
This generally works fine.
Because of how the app stores data, I need to expand this query in the
following way:
1. I need to join another instance of Bar onto the query
2. I need to filter against that instance of Bar
After reading the docs, I was hoping something like this would work -- it
did not, but I'm sharing this to explain the actions I was trying to
accomplish
_aliased = sqlalchemy.orm.alias(Bar, name='bar2')
sql_ors.extend([
sqlalchemy.func.lower(_aliased.string_id) == id_search.lower(),
sqlalchemy.func.lower(_aliased.numeric_id) == id_search.lower(),
])
query = query.join(_aliased, Foo.bar_id == _aliased.id)
A better query would handle this entire section with some CASE clauses, but
I'm hoping to just patch in the right functionality for a bit without
rewriting too much.
Anyone have a clue which ORM api elements I should be using?
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