After_validation question

Rails
1

Hello,

Lets say you’re going to do validates_uniqueness_of on a model’s e-mail
address attribute.

If the e-mail address already exists how do I tell the model to just do
an update instead of redirecting back to the new/create page indicating
that the address already exists? I see a callback called
after_validation but I’m just not sure how to use it; it indeed it is
the method to use.

Any help would be much appreciated.

Thanks,

Binh

2

the more important question is why are you validating for uniquness if
you are going to update any way?

3

i find the simplist/DRYist way to do create/update is to use a define
method
in you application controller put the function

def define(object,get?,id,vals)
if id
model = Object.const_get(object).find(id)
else
model = Object.const_get(object).new
end

if not get?
if id
model.update_attributes(vals)
end
if model.save
flash[:note] = ‘’
else
flash[:note] = ‘’
end
end
return model
end

then in the child controller you call

@model = super(‘model name’, request.get?, params[:id], params[:model])

lastly you need to edit routs to say

map.connect ‘/:controller/edit/:id’, :action => ‘define’
map.connect ‘/:controller/create’, :action => ‘define’

4

hello keynan,

thanks for your response. perhaps i’m thinking about the problem in the
wrong way then. the scenario is, if a visitor comes back to the site
and sign up for a different event, i want to check to see if he’s
already in the DB, and if he is i’ll just update his record instead of
creating a new one. but, perhaps that shoudl be done at the controller
level instead of the model?

binh

Keynan P. wrote:

oh and if validation fails the after_validation event will not fire

5

oh and if validation fails the after_validation event will not fire