Deploy RoR to Heroku and Sqlite3 fails - ruby-on-rails

Question

I've found a number of posts on this same subject (here's one) and thought I made the right changes but I still can't solve the issue.
After completing the bundle install, I push to heroku, I get the following error when it reaches the sqlite3 install.
Installing sqlite3 (1.3.5) with native extensions
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
/usr/local/bin/ruby extconf.rb
checking for sqlite3.h... no
sqlite3.h is missing. Try 'port install sqlite3 +universal'
or 'yum install sqlite-devel' and check your shared library search path (the
location where your sqlite3 shared library is located).
*** 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
--without-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=/usr/local/bin/ruby
--with-sqlite3-dir
--without-sqlite3-dir
--with-sqlite3-include
--without-sqlite3-include=${sqlite3-dir}/include
--with-sqlite3-lib
--without-sqlite3-lib=${sqlite3-dir}/lib
--enable-local
--disable-local
Gem files will remain installed in /tmp/build_13nbwv3kitbub/vendor/bundle/ruby/1.9.1/gems/sqlite3-1.3.5 for inspection.
Results logged to /tmp/build_13nbwv3kitbub/vendor/bundle/ruby/1.9.1/gems/sqlite3-1.3.5/ext/sqlite3/gem_make.out
An error occured while installing sqlite3 (1.3.5), and Bundler cannot continue.
Make sure that `gem install sqlite3 -v '1.3.5'` succeeds before bundling.
!
! Failed to install gems via Bundler.
!
! Heroku push rejected, failed to compile Ruby/rails app
To git#heroku.com:morning-dawn-1372.git
! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'git#heroku.com:morning-dawn-1372.git'
My Gemfile looks like this:
source 'https://rubygems.org'
gem 'rails', '3.2.2'
# Bundle edge Rails instead:
# gem 'rails', :git => 'git://github.com/rails/rails.git'
gem 'json'
group :development, :test do
gem 'sqlite3-ruby', :require => 'sqlite3'
gem 'sqlite3', '1.3.5'
end
# Gems used only for assets and not required
# in production environments by default.
group :assets do
gem 'sass-rails', '~> 3.2.3'
gem 'coffee-rails', '~> 3.2.1'
# See https://github.com/sstephenson/execjs#readme for more supported runtimes
# gem 'therubyracer'
gem 'uglifier', '>= 1.0.3'
end
gem 'jquery-rails'
group :production do
gem 'pg', '0.12.2'
end
# To use ActiveModel has_secure_password
# gem 'bcrypt-ruby', '~> 3.0.0'
# To use Jbuilder templates for JSON
# gem 'jbuilder'
# Use unicorn as the app server
# gem 'unicorn'
# Deploy with Capistrano
# gem 'capistrano'
# To use debugger
# gem 'ruby-debug'
it looks like I have both
Using sqlite3 (1.3.5)
Using sqlite3-ruby (1.3.3)
on my system. Not sure if this is creatign an issue, but explains why I excluded both in the gemfile.
Environmental info:
$ ruby -v
ruby 1.8.7 (2012-02-08 patchlevel 358) [i386-cygwin]
$ rails -v
Rails 3.2.2

Answer 1

Run the bundle command and then make sure that both the Gemfile and Gemfile.lock are checked into the repo before pushing to Heroku.

Answer 2

You will also get this error if sqlite is specified in your Gemfile without a group- for example
gem 'rails', '3.2.13'
# Bundle edge Rails instead:
# gem 'rails', :git => 'git://github.com/rails/rails.git'
# below is the line that's giving you trouble
gem "sqlite3", "~> 1.3.7"
Heroku does not allow sqlite in production, so you must either delete this line or change this to something like
...
group :development, :test do
gem "sqlite3", "~> 1.3.7", :require => "sqlite3"
end
then do bundle install, then git add and git commit your changes to Gemfile and Gemfile.lock.
After you have done this, your git push heroku master should work.

Answer 3

Try this:
Open the Gemfile.lock and scroll down to sqlite3 (1.3.x) under 'specs:'
Make sure it appears only as sqlite3 (1.3.x) with no extra jazz.
If any extra tags such as "-x86-mingw32" is displayed then delete it.
Run Bundle Install.
Then try pushing Heroku master.
Worked for me.
Edit
Now that I know better, please don't ever change the Gemfile.lock manually.
This was written when I started coding in Rails on Windows.
Try updating the particular gem or lock it to a version in your Gemfile.