How to upgrade my version of my rails application

Rails
1

Hello experts!

               I am having problem while upgrading my rails

version from 1.2.3 to 2.3.4.
To tell clearly, my problem is

I have upgraded my rails version from 1.2.3 to 2.3.4. But i was not
able to run the application. When i tries to run the application by
ruby script/server am getting the following error

Undefined method ‘cache_template_extensions’ for
Actionview::Base::class.

And also its showing error in ruby/tasks which presents in the
rakefile of my application.

For these two issues i have removed ‘cache_template_extensions’ from
the config/environments/development.rb and as well as I had upgraded
the rake and rake-tasks gem according to the latest version of rails.

After doing the above steps i tried to run the application, but still
am getting the same error.

To check on which version the application to run, I tried to run ruby
script/about command, in which I ends up with the same error.

SO could u please help me with this.

Thank you.

2

Quoting sam [email protected]:

Hello experts!

               I am having problem while upgrading my rails

version from 1.2.3 to 2.3.4.

I suggest upgrading from 1.2.3 to 1.2.6, fix the deprecation warnings;
upgrade
to 2.0.X, fix any problems, then go to 2.3.4 (or even better 2.3.5, the
current stable release). You are making too big a jump at once. Take
smaller
bites and chew throughly before taking the next :wink:

HTH,
Jeffrey