put text() in there:

func.discounted_price(text("packages.*"))


On Sep 8, 2014, at 9:59 AM, Tyler Bondy <ty.bo...@gmail.com> wrote:

> I have a PostgreSQL function discounted_price(packages%ROWTYPE), where 
> packages is a table. I would like to add a property on the model 
> corresponding 
> to the packages table which returns the result of the discounted_price 
> function.
> 
> Currently I have this which works:
> 
> @property
> def discounted_price(self):
>     return connection.execute('select discounted_price(packages.*) from 
> packages '
>                                           'where package_id=' + 
> str(self.package_id)).first()
> 
> But I'd like to call the function with sqlalchemy.sql.func, I'm just unsure 
> of how to
> pass the packages%ROWTYPE corresponding to the model instance. Something
> like this:
> 
> @property
> def discounted_price(self):
>     return connection.query(func.discounted_price(**I don't know what goes 
> here**))
> 
> Is it possible to do this?
> 
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