Ok - This one is a bit hard to explain in words, especially since I
only dabble in RoR when the job requires it, but here goes:
These models are the ones I'm having an issue with:
class Farm < ActiveRecord::Base
belongs_to :vserver
has_many :reals, :foreign_key => 'farm_id',
:class_name => 'FarmsReal',
:dependent => :destroy
end
class FarmsReal < ActiveRecord::Base
belongs_to :farm
belongs_to :real
end
class Real < ActiveRecord::Base
belongs_to :switch
has_many :farms, :foreign_key => 'real_id',
:class_name => 'FarmsReal'
end
Background: I'm writing a web interface to help us manage load
balancing on our Cisco core switches. Basically, the ActiveScaffold
app would be the way that changes would be planned out, then another
program will read the database, determine the way it should be
configured, and put that config in place on the switch.
Back to the program: Basically a server farm (Farm, above) has many
Real servers associated with it and Real servers can be associated
with multiple farms, so they both have a has_many relationship to each
other, through the FarmReals model. In addition, the FarmReals model
stores the status of that individual connection between the farm and
the real (whether it's in service, or out of service).
Anyhow, with ActiveScaffold, when I add a record, this works just
fine. I get the "Reals" subform pre-populated with a dropdown to
select one of the already created Reals. I can select one and it
works just as I'd expect. When I edit a Farm, I get the "Reals"
subform pre-populated with all the Reals that are already assigned,
and one more new one at the bottom, allowing me to add another Real.
The problem is that if I want to change something about the farm, or
if I want to delete a Real from the farm, when I try to perform the
update, I get an error "Reals is invalid", and it's complaining about
the Real that I intentionally left blank at the bottom of the Reals
form. There's not an "X" by it, like the other ones that have been
already added, so I can't manually delete it each time I edit (though
that's not the solution I really want anyhow).
How can I fix this so that it will not pre-populate a blank dropdown
list at the bottom of the Reals subform? So, when I want to add a
real, I will hit the "Create Another" button thats at the bottom of
that subform. If it worked that way, this would be just fine.
Thanks,
Paul Taylor
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