How to Fix the 'mysql2 Gem Compiled for Wrong MySQL Client Library' Error in Rails?

Error: "mysql2 Gem Compiled for Wrong MySQL Client Library"

When attempting to connect to a MySQL server through a Rails application, developers may encounter the following error:

D:/Program_Files/Ruby192/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require': Incorrect MySQL client library version! This gem was compiled for 6.0.0 but the client library is 5.0.27. (RuntimeError)

Solution:

To rectify this issue, uninstall and reinstall the mysql2 gem using the following commands from the Rails application directory:

> gem uninstall mysql2
> bundle install

This process will fetch the latest version of the mysql2 gem, which is compiled for the correct MySQL client library. Upon completion of the reinstallation, the gem will function as expected, allowing the application to connect to the MySQL server successfully.

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