On Oct 12, 2010, at 12:19 PM, Conrad Taylor wrote: > Hi, you can do the following: > > unless appointment.client.email.blank? > # do something > end > > Next, you may want to do additional because some objects in the chain could > be nil.
try() comes in handy for this... unless appointment.client.try(:email).blank? -philip > Good luck, > > -Conrad > > Sent from my iPhone > > On Oct 12, 2010, at 10:53 AM, "Leonel *.*" <[email protected]> wrote: > >> (MOVED FROM RUBY FORUM) >> >> How can I create an if statement to check if a variable contains a >> value? If it does contain a value, I want to send an email. I'm doing >> the following but it doesn't work... >> >> -------------------------------------------------------- >> EXTRACT >> -------------------------------------------------------- >> def create >> @appointment = Appointment.new(params[:appointment]) >> >> respond_to do |format| >> if @appointment.save >> >> # send email only if a client email is set >> if defined?(appointment.client.email) >> Notifier.appointment_booked(@appointment).deliver >> end >> -------------------------------------------------------- >> >> >> Alex Stahl wrote in post #949576: >>> Looks like you're checking whether or not the variable itself exists, as >>> opposed to if it contains a value. >>> >>> Try this instead: >>> >>> if appointment.client.email >>> #do stuff & things >>> end >>> >>> In this instance, if 'email == nil', the statement will evaluate to >>> false. >> >> appointment belongs to client. so the appointments table has a client_id >> column. and the clients table has an email column. >> >> I think the variable its supposed to be set and empty. I tried your >> suggestion... >> def create >> @appointment = Appointment.new(params[:appointment]) >> >> respond_to do |format| >> if @appointment.save >> >> # send email only if a client email is set >> if @appointment.client.email >> Notifier.appointment_booked(@appointment).deliver >> end >> >> But I see the logs and it seems that it tries to send an email even if >> there is no email for the client. >> >> -- >> Posted via http://www.ruby-forum.com/. >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Ruby on Rails: Talk" group. >> To post to this group, send email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]. >> For more options, visit this group at >> http://groups.google.com/group/rubyonrails-talk?hl=en. >> > > -- > You received this message because you are subscribed to the Google Groups > "Ruby on Rails: Talk" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/rubyonrails-talk?hl=en. > -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
