80 lines
2.5 KiB
Ruby
80 lines
2.5 KiB
Ruby
#-- encoding: UTF-8
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#-- copyright
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# ChiliProject is a project management system.
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#
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# Copyright (C) 2010-2013 the ChiliProject Team
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# See doc/COPYRIGHT.rdoc for more details.
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#++
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module ChiliProject
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# This module provides some information about the currently used database
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# adapter. It can be used to write code specific to certain database
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# vendors which, while not not encouraged, is sometimes necessary due to
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# syntax differences.
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module Database
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# This method returns a hash which maps the identifier of the supported
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# adapter to a regex matching the adapter_name.
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def self.supported_adapters
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@adapters ||= ({
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:mysql => /mysql/i,
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:postgresql => /postgres/i,
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:sqlite => /sqlite/i
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})
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end
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# Get the raw name of the currently used database adapter.
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# This string is set by the used adapter gem.
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def self.adapter_name
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ActiveRecord::Base.connection.adapter_name
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end
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# returns the identifier of the currently used database type
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def self.name
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supported_adapters.find(proc{ [:unknown, //] }) { |adapter, regex|
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self.adapter_name =~ regex
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}[0]
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end
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# Provide helper methods to quickly check the database type
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# ChiliProject::Database.mysql? returns true, if we have a MySQL DB
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supported_adapters.keys.each do |adapter|
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(class << self; self; end).class_eval do
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define_method(:"#{adapter.to_s}?"){ send(:name) == adapter }
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end
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end
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# Return the version of the underlying database engine.
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# Set the +raw+ argument to true to return the unmangled string
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# from the database.
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def self.version(raw = false)
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case self.name
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when :mysql
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version = ActiveRecord::Base.connection.select_value('SELECT VERSION()')
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when :postgresql
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version = ActiveRecord::Base.connection.select_value('SELECT version()')
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raw ? version : version.match(/^PostgreSQL (\S+)/i)[1]
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when :sqlite
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if Object.const_defined?('RUBY_ENGINE') && ::RUBY_ENGINE == 'jruby'
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Jdbc::SQLite3::VERSION
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else
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if SQLite3.const_defined? 'SQLITE_VERSION'
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SQLite3::SQLITE_VERSION
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else
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SQLite3::Driver::Native::API.sqlite3_libversion
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end
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end
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end
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end
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end
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end
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