SVN revision 1666 I am looking at "More on Mapper Options" on
http://sqlalchemy.org/docs/adv_datamapping.myt I have a generic wsgi middleware that takes a table name and returns data from that table. For one table, I want to hide one field. That is, for table named 'coordinator' I want to NOT return the c_password field (but only when accessed via wsgi) So from the above URL it looks like I could do this from sqlalchemy import * from sqlalchemy.mods.threadlocal import * from sqlalchemy.schema import default_metadata Tcoordinator = Table('coordinator', metadata, Column('region_id', Integer, primary_key=True, nullable=False, ), Column('id', Integer, Sequence("coordinator_id", optional=True), primary_key=True, nullable=False, ), Column('c_password', String(12), nullable=False, ), ) class coordinator(object): pass assign_mapper(coordinator, Tcoordinator) # now, coordinator should be a mapper object itself?) if request_method == 'GET': if table_name == 'coordinator': table = coordinator # actually done via a getattr on a module # modify the mapper table = table.options(noload('c_password')) record = table.get(int(id)) results = { 'table_name':table_name, 'id':id, 'record':record or None, } But this doesn't work, I get: File 'E:\\prj\\src\\eclipse\\parent_to_parent\\Web\\p2pserver\\p2pserver\\dbaccess.py', line 50 in __call__ table = table.options(noload('c_password')) exceptions.AttributeError: type object 'coordinator' has no attribute 'options' I thought that assign_mapper assigned all the attributes of a mapper to it's class (get, select, etc) But maybe options was left out? So then I tried this: if table_name == 'coordinator': # modify the mapper table = table.mapper.options(noload('c_password')) But now I get this error: File 'E:\\prj\\src\\eclipse\\parent_to_parent\\Web\\p2pserver\\p2pserver\\database.py', line 42 in __call__ ok_callback=manager.finish) File 'e:\\prj\\src\\paste\\paste\\wsgilib.py', line 114 in catch_errors app_iter = application(environ, start_response) File 'e:\\prj\\src\\paste\\paste\\urlmap.py', line 202 in __call__ return app(environ, start_response) File 'E:\\prj\\src\\eclipse\\parent_to_parent\\Web\\p2pserver\\p2pserver\\dbaccess.py', line 51 in __call__ table = table.mapper.options(noload('c_password')) File 'e:\\prj\\src\\sqlalchemy\\lib\\sqlalchemy\\orm\\mapper.py', line 717 in options option.process(mapper) File 'e:\\prj\\src\\sqlalchemy\\lib\\sqlalchemy\\orm\\properties.py', line 643 in process self.process_by_key(mapper, self.key) File 'e:\\prj\\src\\sqlalchemy\\lib\\sqlalchemy\\orm\\properties.py', line 652 in process_by_key self.create_prop(mapper, tokens[0]) File 'e:\\prj\\src\\sqlalchemy\\lib\\sqlalchemy\\orm\\properties.py', line 729 in create_prop mapper._compile_property(key, newprop) File 'e:\\prj\\src\\sqlalchemy\\lib\\sqlalchemy\\orm\\mapper.py', line 602 in _compile_property prop.init(key, self) File 'e:\\prj\\src\\sqlalchemy\\lib\\sqlalchemy\\orm\\mapper.py', line 1167 in init self.do_init(key, parent) File 'e:\\prj\\src\\sqlalchemy\\lib\\sqlalchemy\\orm\\properties.py', line 198 in do_init if isinstance(self.argument, type): exceptions.AttributeError: 'PropertyLoader' object has no attribute 'argument' So then I tried this instead (pretty much copied from the website) if table_name == 'coordinator': # modify the mapper table = class_mapper(table).options(noload('c_password')) But I get the same exception: exceptions.AttributeError: 'PropertyLoader' object has no attribute 'argument' What am I doing wrong? -- Brad Clements, [EMAIL PROTECTED] (315)268-1000 http://www.murkworks.com AOL-IM or SKYPE: BKClements Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Sqlalchemy-users mailing list Sqlalchemy-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/sqlalchemy-users
