Module: ActiveRecord::Turntable::Compatibility

Included in:
ActiveRecordExt::AbstractAdapter, ActiveRecordExt::Persistence, ActiveRecordExt::QueryCache::ClassMethods
Defined in:
lib/active_record/turntable/compatibility.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.extended(base) ⇒ Object 



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# File 'lib/active_record/turntable/compatibility.rb', line 3

def self.extended(base)
  base.instance_variable_set(:@_compatible_versions, [])
end

Instance Method Details

#[](version = ActiveRecord.gem_version.release) ⇒ Object Also known as: compatible_module 



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# File 'lib/active_record/turntable/compatibility.rb', line 7

def [](version = ActiveRecord.gem_version.release)
  unless version.is_a?(Gem::Version)
    version = Gem::Version.new(version)
  end
  find_compatible_module(version)
end

#compatible_versions ⇒ Object 



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# File 'lib/active_record/turntable/compatibility.rb', line 31

def compatible_versions
  if @_compatible_versions.empty?
    @_compatible_versions = constants.map do |const|
      /^V(?<major>\d+)(_(?<minor>\d+)(_(?<teeny>\d))?)?/ =~ const
      nil unless major
      Gem::Version.new([major, minor, teeny].compact.join("."))
    end
    @_compatible_versions.compact!
    @_compatible_versions.sort!
  end
  @_compatible_versions
end

#find_compatible_module(version) ⇒ Object 



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# File 'lib/active_record/turntable/compatibility.rb', line 15

def find_compatible_module(version)
  module_version = find_compatible_version(version)
  const_get("V#{module_version.to_s.tr(".", "_")}")
end

#find_compatible_version(version) ⇒ Object 



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# File 'lib/active_record/turntable/compatibility.rb', line 20

def find_compatible_version(version)
  target_version = nil

  compatible_versions.each do |compatible_version|
    break if version < compatible_version
    target_version = compatible_version
  end

  target_version
end