Installing rails app with sqlite on heroku - ruby-on-rails

Question

Hi i am trying to deploy my rails app to heroku using sqlite
reading previous stackoverflow answers
i changed my gemfile as follows
group :production, :staging do
gem 'pg', '0.17.1'
end
group :development, :test do
gem 'sqlite3'
end
but still it is giving error on bundle install
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
/Users/akash.bansal/.rvm/rubies/ruby-1.9.3-p448/bin/ruby extconf.rb
checking for pg_config... no
No pg_config... trying anyway. If building fails, please try again with
--with-pg-config=/path/to/pg_config
checking for libpq-fe.h... no
Can't find the 'libpq-fe.h header
* extconf.rb failed *
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers. Check the mkmf.log file for more
details. You may need configuration options.
Provided configuration options:
--with-opt-dir
--with-opt-include
--without-opt-include=${opt-dir}/include
--with-opt-lib
--without-opt-lib=${opt-dir}/lib
--with-make-prog
--without-make-prog
--srcdir=.
--curdir
--ruby=/Users/akash.bansal/.rvm/rubies/ruby-1.9.3-p448/bin/ruby
--with-pg
--without-pg
--with-pg-config
--without-pg-config
--with-pg_config
--without-pg_config
--with-pg-dir
--without-pg-dir
--with-pg-include
--without-pg-include=${pg-dir}/include
--with-pg-lib
--without-pg-lib=${pg-dir}/lib
extconf failed, exit code 1
Gem files will remain installed in /Users/akash.bansal/sites/onemustwatch/.bundle/ruby/1.9.1/gems/pg-0.17.1 for inspection.
Results logged to /Users/akash.bansal/sites/onemustwatch/.bundle/ruby/1.9.1/extensions/x86_64-darwin-13/1.9.1/pg-0.17.1/gem_make.out`

Answer 1

You need to install Postgres on your local machine in order to run bundle install. To do that run brew install postgresql. If you don't have Homebrew, you can install it here