Class: ActiveWrapper::Db

Inherits:
Object
  • Object
show all
Defined in:
lib/active_wrapper/db.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ Db

Returns a new instance of Db.



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# File 'lib/active_wrapper/db.rb', line 6

def initialize(options)
  @base = options[:base]
  if File.exists?(path = "#{base}/config/database.yml")
    @config = YAML::load(File.open(path))
  else
    raise "Could not find #{path}"
  end
  @env = options[:env].to_s
  unless config[env]
    raise "Environment \"#{env}\" not found in #{path}"
  end
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args) ⇒ Object 



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# File 'lib/active_wrapper/db.rb', line 92

def method_missing(method, *args)
  ActiveRecord::Base.connection.send(method, *args)
end

Instance Attribute Details

#base ⇒ Object (readonly)

Returns the value of attribute base.



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# File 'lib/active_wrapper/db.rb', line 4

def base
  @base
end

#config ⇒ Object (readonly)

Returns the value of attribute config.



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# File 'lib/active_wrapper/db.rb', line 4

def config
  @config
end

#env ⇒ Object (readonly)

Returns the value of attribute env.



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# File 'lib/active_wrapper/db.rb', line 4

def env
  @env
end

Instance Method Details

#connected? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active_wrapper/db.rb', line 19

def connected?
  ActiveRecord::Base.connected?
end

#create_db ⇒ Object 



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# File 'lib/active_wrapper/db.rb', line 23

def create_db
  establish_connection('database' => nil)
  ActiveRecord::Base.connection.create_database config[env]['database']
  establish_connection({})
end

#drop_db ⇒ Object 



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# File 'lib/active_wrapper/db.rb', line 29

def drop_db
  establish_connection('database' => nil)
  ActiveRecord::Base.connection.drop_database config[env]['database']
end

#establish_connection(options = nil) ⇒ Object 



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# File 'lib/active_wrapper/db.rb', line 34

def establish_connection(options=nil)
  if !connected? || options
    config_clone = Marshal.load(Marshal.dump(config))
    config_clone[env].merge!(options || {})
    ActiveRecord::Base.configurations = config_clone
    ActiveRecord::Base.establish_connection(env)
  end
end

#generate_migration(name = nil) ⇒ Object 



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# File 'lib/active_wrapper/db.rb', line 57

def generate_migration(name=nil)
  redirect_stdout do
    raise "Please specify desired migration name with NAME=my_migration_name" unless name
  
    migration_name = name.strip.chomp
    migrations_path = "#{base}/db/migrate"
    migrations_template = File.expand_path("#{File.dirname(__FILE__)}/../../resources/migration.template")
  
    # Find the highest existing migration version or set to 1
    if (existing_migrations = Dir[File.join(migrations_path, '*.rb')]).length > 0
      version = File.basename(existing_migrations.sort.reverse.first)[/^(\d+)_/,1].to_i + 1
    else
      version = 1
    end
  
    # Read the contents of the migration template into string
    migrations_template = File.read(migrations_template)
  
    # Replace the migration name in template with the acutal one
    migration_content = migrations_template.gsub('__migration_name__', migration_name.camelize)
    migration_content = migration_content.gsub('__migration_table__', migration_name)
  
    # Generate migration filename
    migration_filename = "#{"%03d" % version}_#{migration_name}.rb"
  
    # Write the migration
    File.open(File.join(migrations_path, migration_filename), "w+") do |migration|
      migration.puts migration_content
    end
  
    # Done!
    puts "Successfully created migration #{migration_filename}"
  end
end

#migrate(version = nil) ⇒ Object 



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# File 'lib/active_wrapper/db.rb', line 43

def migrate(version=nil)
  establish_connection
  redirect_stdout do
    ActiveRecord::Migrator.migrate("#{base}/db/migrate", version)
  end
end

#migrate_reset ⇒ Object 



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# File 'lib/active_wrapper/db.rb', line 50

def migrate_reset
  redirect_stdout do
    migrate(0)
    migrate
  end
end

#redirect_stdout(&block) ⇒ Object 



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# File 'lib/active_wrapper/db.rb', line 96

def redirect_stdout(&block)
  if env == 'test'
    stdout = $stdout
    $stdout = File.new('/dev/null', 'w')
  end
  yield
  if env == 'test'
    $stdout = stdout
  end
end