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module ActiveRecord
module Tasks # :nodoc:
module DatabaseTasks # :nodoc:
extend self
LOCAL_HOSTS = ['127.0.0.1', 'localhost']
def register_task(pattern, task)
@tasks ||= {}
@tasks[pattern] = task
end
register_task(/mysql/, ActiveRecord::Tasks::MySQLDatabaseTasks)
register_task(/postgresql/, ActiveRecord::Tasks::PostgreSQLDatabaseTasks)
register_task(/sqlite/, ActiveRecord::Tasks::SQLiteDatabaseTasks)
def create(*arguments)
configuration = arguments.first
class_for_adapter(configuration['adapter']).new(*arguments).create
rescue Exception => error
$stderr.puts error, *(error.backtrace)
$stderr.puts "Couldn't create database for #{configuration.inspect}"
end
def create_all
each_local_configuration { |configuration| create configuration }
end
def create_current(environment = Rails.env)
each_current_configuration(environment) { |configuration|
create configuration
}
ActiveRecord::Base.establish_connection environment
end
def drop(*arguments)
configuration = arguments.first
class_for_adapter(configuration['adapter']).new(*arguments).drop
rescue Exception => error
$stderr.puts error, *(error.backtrace)
$stderr.puts "Couldn't drop #{configuration['database']}"
end
def drop_all
each_local_configuration { |configuration| drop configuration }
end
def drop_current(environment = Rails.env)
each_current_configuration(environment) { |configuration|
drop configuration
}
end
def charset_current(environment = Rails.env)
charset ActiveRecord::Base.configurations[environment]
end
def charset(*arguments)
configuration = arguments.first
class_for_adapter(configuration['adapter']).new(*arguments).charset
end
def collation_current(environment = Rails.env)
collation ActiveRecord::Base.configurations[environment]
end
def collation(*arguments)
configuration = arguments.first
class_for_adapter(configuration['adapter']).new(*arguments).collation
end
def purge(configuration)
class_for_adapter(configuration['adapter']).new(configuration).purge
end
def structure_dump(*arguments)
configuration = arguments.first
filename = arguments.delete_at 1
class_for_adapter(configuration['adapter']).new(*arguments).structure_dump(filename)
end
def structure_load(*arguments)
configuration = arguments.first
filename = arguments.delete_at 1
class_for_adapter(configuration['adapter']).new(*arguments).structure_load(filename)
end
private
def class_for_adapter(adapter)
key = @tasks.keys.detect { |pattern| adapter[pattern] }
@tasks[key]
end
def each_current_configuration(environment)
environments = [environment]
environments << 'test' if environment.development?
configurations = ActiveRecord::Base.configurations.values_at(*environments)
configurations.compact.each do |configuration|
yield configuration unless configuration['database'].blank?
end
end
def each_local_configuration
ActiveRecord::Base.configurations.each_value do |configuration|
next unless configuration['database']
if local_database?(configuration)
yield configuration
else
$stderr.puts "This task only modifies local databases. #{configuration['database']} is on a remote host."
end
end
end
def local_database?(configuration)
configuration['host'].blank? || LOCAL_HOSTS.include?(configuration['host'])
end
end
end
end
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