'Rails is not currently installed' after editing path variable

Hi,

last week I still had a functioning rails development environment installed on my mac. Since I had issues with creating a mysql database (it was always aborted because the a library could not be found, I created a symbolic link following this post: https://stackoverflow.com/questions/6383310/python-mysqldb-library-not-loaded-libmysqlclient-18-dylib. This did enable me to create the database and migrations, however, I could not use the mysql commands and was unable to start the mysql prompt from the terminal. I would always get a warning the the command was not found. So today I edited my path variable, by inputting the following into my .bash_profile file:

export PATH=${PATH}:/usr/local/mysql/bin

This did admittedly fix the issue with mysql. However, when I did try to continue on the project I realised that my system can't find any rails installation. The actual message I get is:

Rails is not currently installed on this system. To get the latest version, simply type:
    $ sudo gem install rails
You can then rerun your "rails" command.

While I am not 100% sure that exporting the path is the issue, I have in the meantime updated El Capitain and had some trouble agreeing to the xcode license (clang: error: no input files; I seem to only encounter errors these days ... ), it might be and I have no idea how to fix it. Because surely rails must be hidden somewhere on my system?!?!?

Does anyone know how to find and fix it, or whether I should install it again??

I appreciate any kind of help because I am absolutely lost.

Thanks!