How do I install gems?

How do I install gems?

To install a gem, use gem install [gem] . Browsing installed gems is done with gem list . For more information about the gem command, see below or head to RubyGems’ docs.

What is GEM mysql2?

The mysql2 gem converts MySQL field types to Ruby data types in C code, providing a serious speed benefit. The do_mysql gem also converts MySQL fields types, but has a considerably more complex API and is still ~2x slower than mysql2.

How do I downgrade a gem version?

If you want to automate it in a script (I had the same problem after a gem update ), just do the following:

  1. Install your favored version (if you don’t have already) gem install compass -v 1.2.3.
  2. Uninstall newer versions. gem uninstall compass -v ‘>1.2.3’ –force.

How do I uninstall a specific version of a gem?

Removing a specific gem

  1. sudo gem uninstall GEMNAME.
  2. sudo gem uninstall GEMNAME –version 1.1.0.
  3. sudo gem cleanup GEMNAME.
  4. sudo gem cleanup.

How do I close mysql2 connection?

Closing database connection To close a database connection gracefully, you call the end() method on the connection object. The end() method ensures that all remaining queries are always executed before the database connection closed. To force the connection close immediately, you can use the destroy() method.

How do I check my GEM version?

Since your goal is to verify a gem is installed with the correct version, use gem list . You can limit to the specific gem by using gem list data_mapper . To verify that it’s installed and working, you’ll have to try to require the gem and then use it in your code.

Do I need to close MySQL connection?

Originally Answered: Is it necessary to close an MySQL connection in PHP? No (mostly). According to the documentation , database connections are closed at the end of a PHP script for non-persistent connections. MySQL 5.3 introduced persistent connections , which should be closed when you are finished with them.