[Sqlalchemy-tickets] Issue #3290: ORM class attributes that are mapped to database table: provide as built-in method. Generally, provide ORM class-level info. (zzzeek/sqlalchemy)

[taibit <iss...@bi...>]

New issue 3290: ORM class attributes that are mapped to database table: provide as built-in method.  Generally, provide ORM class-level info.
https://bitbucket.org/zzzeek/sqlalchemy/issue/3290/orm-class-attributes-that-are-mapped-to

taibit:

I wanted a list of ORM class attributes that are mapped to db columns.

I found the built-in (private) function _orm_columns() in the source code file /lib/sqlalchemy/orm/base.py 
which worked when my ORM class attributes were not re-named.

But when I made an ORM attribute different from the db column, the _orm_columns() no longer worked.

Generally, there seems to be a need for info about the ORM class that is distinct from the mapping of that class to a db table.
There does not seem to be a place for that info that is provided out-of-the-box as far as I can tell.

My a solution for my particular issue that includes my code is posted on stackoverflow at: 
http://stackoverflow.com/questions/27947294/when-the-sqlalchemy-orm-class-attributes-are-different-from-database-columns-ho


BTW, is there a reason that the function  _orm_columns()  is private and not documented?
Otherwise, users struggle to come up with their own solution as in: 
http://stackoverflow.com/questions/1958219/convert-sqlalchemy-row-object-to-python-dict/24748320#24748320


On the positive side, it's nice that sqlalchemy and python provide the flexible structure for me to create a simple solution for my particular need as is documented in Mixin and Custom Base Classes http://docs.sqlalchemy.org/en/rel_0_9/orm/extensions/declarative/mixins.html