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class ActiveRecord::Tasks::DatabaseTasks
TASKS_PATTERNS = {
/mysql/ => ActiveRecord::Tasks::MySQLDatabaseTasks,
/postgresql/ => ActiveRecord::Tasks::PostgreSQLDatabaseTasks,
/sqlite/ => ActiveRecord::Tasks::SQLiteDatabaseTasks
}
LOCAL_HOSTS = ['127.0.0.1', 'localhost']
def self.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 self.create_all
each_local_configuration { |configuration| create configuration }
end
def self.create_current(environment = Rails.env)
each_current_configuration(environment) { |configuration|
create configuration
}
ActiveRecord::Base.establish_connection environment
end
def self.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 self.drop_all
each_local_configuration { |configuration| drop configuration }
end
def self.drop_current(environment = Rails.env)
each_current_configuration(environment) { |configuration|
drop configuration
}
end
def self.purge(configuration)
class_for_adapter(configuration['adapter']).new(configuration).purge
end
private
def self.class_for_adapter(adapter)
key = TASKS_PATTERNS.keys.detect { |pattern| adapter[pattern] }
TASKS_PATTERNS[key]
end
def self.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 self.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 self.local_database?(configuration)
configuration['host'].in?(LOCAL_HOSTS) || configuration['host'].blank?
end
end
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