Module: Mongoid::Shardable

Extended by:
ActiveSupport::Concern
Included in:
Composable
Defined in:
lib/mongoid/shardable.rb

Overview

This module contains behavior for adding shard key fields to updates.

Since:

  • 4.0.0

Defined Under Namespace

Modules: ClassMethods

Instance Method Summary collapse

Instance Method Details

#shard_key_fields ⇒ Array<String>

Note:

Refactored from using delegate for class load performance.

Get the shard key fields.

Examples:

Get the shard key fields.

model.shard_key_fields

Returns:

  • (Array<String>) —

    The shard key field names.

Since:

  • 1.0.0



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# File 'lib/mongoid/shardable.rb', line 51

def shard_key_fields
  self.class.shard_key_fields
end

#shard_key_selector ⇒ Hash

Get the document selector with the defined shard keys.

Examples:

Get the selector for the shard keys.

person.shard_key_selector

Returns:

  • (Hash) —

    The shard key selector.

Since:

  • 2.0.0



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# File 'lib/mongoid/shardable.rb', line 63

def shard_key_selector
  selector = {}
  shard_key_fields.each do |field|
    selector[field.to_s] = new_record? ? send(field) : attribute_was(field)
  end
  selector
end