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# File 'lib/mover.rb', line 31
def move_to(to_class, options={})
from_class = self
conditions = options[:conditions] || '1'
conditions = self.sanitize_sql(conditions)
where = "WHERE #{conditions}"
magic = options[:magic] || 'moved_at'
from = {
:columns => from_class.column_names,
:table => from_class.table_name
}
to = {
:columns => to_class.column_names,
:table => to_class.table_name
}
insert = (from[:columns] & to[:columns]).inject({}) do |hash, column|
if column == magic && !options[:migrate]
hash[column] = Time.now.utc
else
hash[column] = column
end
hash
end
if to[:columns].include?(magic) && !from[:columns].include?(magic)
insert[magic] = Time.now.utc
end
insert = insert.inject({}) do |hash, (column, value)|
if value.is_a?(::Time)
hash[connection.quote_column_name(column)] = connection.quote(value)
else
hash[connection.quote_column_name(column)] = connection.quote_column_name(value)
end
hash
end
collector = lambda do |(classes, block)|
classes.collect! { |c| eval(c.to_s) }
block if classes.include?(to_class) || classes.empty?
end
before = (@before_move || []).collect(&collector).compact
after = (@after_move || []).collect(&collector).compact
instances =
if options[:instance]
[ options[:instance] ]
elsif before.empty? && after.empty?
[]
else
self.find(:all, :conditions => conditions)
end
options.delete(:instance)
exec_callbacks = lambda do |callbacks|
callbacks.each do |block|
instances.each do |instance|
instance.move_options = options
instance.instance_eval(&block)
instance.move_options = nil
end
end
end
transaction do
exec_callbacks.call before
if options[:quick]
connection.execute(" INSERT INTO \#{to[:table]} (\#{insert.keys.join(', ')})\n SELECT \#{insert.values.join(', ')}\n FROM \#{from[:table]}\n \#{where}\n SQL\n elsif !options[:generic] && connection.class.to_s.include?('Mysql')\n update = insert.collect do |column, value|\n if value.include?(\"'\")\n \"\#{to[:table]}.\#{column} = \#{value}\"\n else\n \"\#{to[:table]}.\#{column} = \#{from[:table]}.\#{value}\"\n end\n end\n \n connection.execute(<<-SQL)\n INSERT INTO \#{to[:table]} (\#{insert.keys.join(', ')})\n SELECT \#{insert.values.join(', ')}\n FROM \#{from[:table]}\n \#{where}\n ON DUPLICATE KEY\n UPDATE \#{update.join(', ')};\n SQL\n else\n conditions.gsub!(to[:table], 't')\n conditions.gsub!(from[:table], 'f')\n select = insert.values.collect { |i| i.include?(\"'\") ? i : \"f.\#{i}\" }\n set = insert.collect do |column, value|\n if value.include?(\"'\")\n \"t.\#{column} = \#{value}\"\n else\n \"t.\#{column} = f.\#{value}\"\n end\n end\n \n connection.execute(<<-SQL)\n UPDATE \#{to[:table]}\n AS t\n INNER JOIN \#{from[:table]}\n AS f\n ON f.id = t.id\n AND \#{conditions}\n SET \#{set.join(', ')}\n SQL\n \n connection.execute(<<-SQL)\n INSERT INTO \#{to[:table]} (\#{insert.keys.join(', ')})\n SELECT \#{select.join(', ')}\n FROM \#{from[:table]}\n AS f\n LEFT OUTER JOIN \#{to[:table]}\n AS t\n ON f.id = t.id\n WHERE (\n t.id IS NULL\n AND \#{conditions}\n )\n SQL\n end\n \n unless options[:copy]\n connection.execute(\"DELETE FROM \#{from[:table]} \#{where}\")\n end\n \n exec_callbacks.call after\n end\nend\n")
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