# Nesting exception **URL:** \ **Category:** ruby-talk\ **Created:** [22 August 2008 09:48 UTC](https://rubytalk.org/t/nesting-exception/48529 "2008-08-22T09:48:09Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Sijo\_Kg](https://avatars.discourse-cdn.com/v4/letter/s/bbe5ce/32.png) [@Sijo\_Kg](https://rubytalk.org/u/Sijo_Kg)\ **Post date:** [22 August 2008 09:48 UTC](https://rubytalk.org/t/nesting-exception/48529/1 "2008-08-22T09:48:09Z")
Hi    I have the following code It is working I have no file named a begin   f=File.open('a')   rescue Exception =\> exception         if exception.message == 'No such file or directory - a'          puts ' in first rescue'        else         puts 'in else case'        end end So here I get 'in first rescue' Now what i did is I deliberately changed exception.message1 .So sure I will get an excption here And How cn I handle that(This is for learning only).I tried like begin   f=File.open('a')   rescue Exception =\> exception         if exception.message1 != 'No such file or directory - a'          puts ' in first rescue'        else         puts 'in else case'         rescue NoMethodError =\> e:                 puts e.to\_s    # raise    # puts 'error'        end end       But it gives syntax error         rescue NoMethodError =\> e:    How can I solve this..Even now searching a lot in google I am not that much confident in exception handling in Ruby and also rails Thanks in advance Sijo > **···** > > -- > Posted via [http://www.ruby-forum.com/](http://www.ruby-forum.com/). ---
**Author:** ![Hemant\_Kumar](https://avatars.discourse-cdn.com/v4/letter/h/46a35a/32.png) [@Hemant\_Kumar](https://rubytalk.org/u/Hemant_Kumar)\ **Post date:** [22 August 2008 10:07 UTC](https://rubytalk.org/t/nesting-exception/48529/2 "2008-08-22T10:07:05Z")
Ignoring, whatever you are trying to do, your exception handling is wrong, it should be: rescue NoMethodError =\> e > **···** > > On Fri, 2008-08-22 at 18:48 +0900, Sijo Kg wrote: > > > Hi > >    I have the following code It is working I have no file named a > > begin > >   f=File.open('a') > >   rescue Exception =\> exception > >         if exception.message == 'No such file or directory - a' > >          puts ' in first rescue' > >        else > >         puts 'in else case' > >        end > > end > > > > So here I get 'in first rescue' > > > > Now what i did is I deliberately changed exception.message1 .So sure I > > will get an excption here And How cn I handle that(This is for learning > > only).I tried like > > > > begin > >   f=File.open('a') > >   rescue Exception =\> exception > >         if exception.message1 != 'No such file or directory - a' > >          puts ' in first rescue' > >        else > >         puts 'in else case' > >         rescue NoMethodError =\> e: > >                 puts e.to\_s > >    # raise > >    # puts 'error' > >        end > > end > >       But it gives syntax error > >         rescue NoMethodError =\> e: > >    How can I solve this..Even now searching a lot in google I am not > > that much confident in exception handling in Ruby and also rails ---
**Author:** ![Sijo\_Kg](https://avatars.discourse-cdn.com/v4/letter/s/bbe5ce/32.png) [@Sijo\_Kg](https://rubytalk.org/u/Sijo_Kg)\ **Post date:** [22 August 2008 10:29 UTC](https://rubytalk.org/t/nesting-exception/48529/3 "2008-08-22T10:29:09Z")
I tried begin   f=File.open('a')   rescue Exception =\> exception        if exception.message1 == 'No such file or directory - a'           puts ' in if part of rescue'        else          puts 'in else case'          rescue NoMethodError =\> e:                 puts e.to\_s         end end        Above I purposefully changed exception.message to exception.message1. If it was exception.message and also     rescue NoMethodError =\> e:     puts e.to\_s were absent I would get 'in if part of rescue'..So as everyone know exception.message1 doesnot exists. I would like to know how to handle that exception. Where to place that rescue(Am I right?) Thanks Sijo > **···** > > -- > Posted via [http://www.ruby-forum.com/](http://www.ruby-forum.com/). ---
**Author:** ![Robert\_K1](https://yyz1.discourse-cdn.com/flex029/user_avatar/rubytalk.org/robert_k1/32/1830_2.png) [@Robert\_K1](https://rubytalk.org/u/Robert_K1)\ **Post date:** [22 August 2008 10:50 UTC](https://rubytalk.org/t/nesting-exception/48529/4 "2008-08-22T10:50:15Z")
First of all, you cannot use a symbol where you are using it as Hemant already remarked. Second, if you want to catch exceptions that occur during exception handling you need to put a begin rescue end block inside the rescue block. robert > **···** > > 2008/8/22 Sijo Kg \: > > > I tried > > begin > > f=File.open('a') > > rescue Exception =\> exception > >       if exception.message1 == 'No such file or directory - a' > >          puts ' in if part of rescue' > >       else > >         puts 'in else case' > >         rescue NoMethodError =\> e: > >                puts e.to\_s > >        end > > end > >       Above I purposefully changed exception.message to > > exception.message1. If it was exception.message and also > >    rescue NoMethodError =\> e: > >    puts e.to\_s > > were absent I would get 'in if part of rescue'..So as everyone know > > exception.message1 doesnot exists. I would like to know how to handle > > that exception. Where to place that rescue(Am I right?) > > -- > use.inject do |as, often| as.you\_can - without end ---
**Author:** ![Sijo\_Kg](https://avatars.discourse-cdn.com/v4/letter/s/bbe5ce/32.png) [@Sijo\_Kg](https://rubytalk.org/u/Sijo_Kg)\ **Post date:** [22 August 2008 11:09 UTC](https://rubytalk.org/t/nesting-exception/48529/5 "2008-08-22T11:09:05Z")
Hi    Thanks for the reply .The following is working and prints 'Also this error caught' begin   f=File.open('a')   rescue Exception =\> exception      begin          if exception.message1 == 'No such file or directory - a'            puts ' in if part of rescue'          else            puts 'in else case'          end         rescue NoMethodError =\> e:                puts 'Also this error caught'       end end Sijo > **···** > > -- > Posted via [http://www.ruby-forum.com/](http://www.ruby-forum.com/).