I'm trying to write a column_property that queries a table that will be
defined after the current table is defined. I tried using raw SQL but I'm
getting an error.
On the "page" table I define a "count_posts" column_property.
count_posts = orm.column_property(text(
'SELECT count(post.id) FROM post WHERE post.page_id = page.id'))
# AttributeError: 'TextClause' object has no attribute 'label'
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SQLAlchemy -
The Python SQL Toolkit and Object Relational Mapper
http://www.sqlalchemy.org/
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