```ruby
# coding: utf-8
lib = File.expand_path('../lib', __FILE__)
$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
require 'settings_on_rails/version'

Gem::Specification.new do |spec|
  spec.name          = 'settings_on_rails'
  spec.version       = SettingsOnRails::VERSION
  spec.authors       = ['ALLEN WANG QIANG']
  spec.email         = ['qwang@comp.nus.edu.sg']

  spec.summary       = %q{Handle Model specific Settings for Rails.}
  spec.description   = %q{Ruby Gem help to handle model specific settings for ActiveRecord, settings are stored as hashes. Supports multiple keys and default values.}
  spec.homepage      = 'https://github.com/allenwq/settings_on_rails'
  spec.license       = 'MIT'

  spec.files         = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
  spec.bindir        = 'exe'
  spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
  spec.require_paths = ["lib"]

  spec.required_ruby_version = '>= 1.9'

  spec.add_dependency 'activerecord', '>= 3.1'
  spec.add_development_dependency 'bundler'
  spec.add_development_dependency 'rake'
  spec.add_development_dependency 'rspec', '~> 3'
end
```

Add sqlite3 as test db
user
```ruby
# coding: utf-8
lib = File.expand_path('../lib', __FILE__)
$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
require 'settings_on_rails/version'

Gem::Specification.new do |spec|
  spec.name          = 'settings_on_rails'
  spec.version       = SettingsOnRails::VERSION
  spec.authors       = ['ALLEN WANG QIANG']
  spec.email         = ['qwang@comp.nus.edu.sg']

  spec.summary       = %q{Handle Model specific Settings for Rails.}
  spec.description   = %q{Ruby Gem help to handle model specific settings for ActiveRecord, settings are stored as hashes. Supports multiple keys and default values.}
  spec.homepage      = 'https://github.com/allenwq/settings_on_rails'
  spec.license       = 'MIT'

  spec.files         = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
  spec.bindir        = 'exe'
  spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
  spec.require_paths = ["lib"]

  spec.required_ruby_version = '>= 1.9'

  spec.add_dependency 'activerecord', '>= 3.1'
  spec.add_development_dependency 'sqlite3', '~> 1.3'
  spec.add_development_dependency 'bundler', '~> 1.6'
  spec.add_development_dependency 'rspec', '~> 3'
  spec.add_development_dependency 'rake', '~> 10'
end
```
assistant