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Contents
# encoding: utf-8
module Mongoid
# This module contains behaviour for adding shard key fields to updates.
#
# @since 4.0.0
module Shardable
extend ActiveSupport::Concern
included do
cattr_accessor :shard_key_fields
self.shard_key_fields = []
end
# Get the shard key fields.
#
# @note Refactored from using delegate for class load performance.
#
# @example Get the shard key fields.
# model.shard_key_fields
#
# @return [ Array<String> ] The shard key field names.
#
# @since 1.0.0
def shard_key_fields
self.class.shard_key_fields
end
# Get the document selector with the defined shard keys.
#
# @example Get the selector for the shard keys.
# person.shard_key_selector
#
# @return [ Hash ] The shard key selector.
#
# @since 2.0.0
def shard_key_selector
selector = {}
shard_key_fields.each do |field|
selector[field.to_s] = send(field)
end
selector
end
module ClassMethods
# Specifies a shard key with the field(s) specified.
#
# @example Specify the shard key.
#
# class Person
# include Mongoid::Document
# field :first_name, :type => String
# field :last_name, :type => String
#
# shard_key :first_name, :last_name
# end
#
# @since 2.0.0
def shard_key(*names)
names.each do |name|
self.shard_key_fields << self.database_field_name(name).to_sym
end
end
end
end
end
Version data entries
35 entries across 33 versions & 3 rubygems