I discovered an interesting issue with Merb's Controller#resource
today. I posted about this to the merb list, but it seemed relevant
for DM as well. The issue is this:
resource(Company.first, :teams)
works fine but
resource(@team.company, :teams)
fails to find the route.
After some digging, I discovered the problem. To find the route,
#resource uses the object's class name as part of the route key.
Company.first is of class Company, and @team.company is of class
DataMapper::Associations::ManyToOne::Proxy. The interesting thing is
that calling inspect on each of them gives the same results, since
Proxy overrides #kind_of?, so this problem took me a while to find.
I suppose DataMapper::Associations::ManyToOne::Proxy should forward
#class as well, unless there is another solution anyone could propose.
Is there a different method that #resource could be using to turn the
class into a key?
The workaround for getting the right class is:
company = Company.get!(team.company_id)
(Another workaround in Merb is to use named URLs with the #url method
and avoid this problem
entirely, but I want to be consistent and use #resource for all
resource
links.)
My colleague suggested another interesting workaround that Merb could
implement:
class Object
def real_class_name
class.to_s
end
end
class Proxy
def real_class_name
parent.class.to_s
end
end
And then #resource would use real_class_name instead of class_name.
..tony..
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