heroku db:pull cant connect to my DB in ubuntu

Question

So I recently updated ubuntu to 11.04 and then downgraded back to 11.04 because I hated unity. Anyway, after I reinstalled 11.40 I had to clone all my old heroku apps and tried

Answer 1

run :

gem install taps then heroku db:pull again

It may be work?

Answer 2

You may have mysql2 in your Gemfile but have you done a bundle install - i.e. do you have the mysql2 gem installed ?

Answer 3

run :

gem install mysql2 than heroku db:pull again ...

if you get this error with the previous "gem install mysql2" :

Building native extensions.  This could take a while...
ERROR:  Error installing mysql2:
  ERROR: Failed to build gem native extension.

probably libmysqlclient-dev package should be installed :

sudo apt-get install mysql-server mysql-server-5.1 libmysqlclient-dev mysql-client-5.1 mysql-common

than

gem install mysql2

... or eventually run

locate mysql_config

then replace the resulting path, with in the following command path :

sudo gem install mysql -- --with-mysql-config=/usr/local/mysql/bin/mysql_config