Module: Mongoid::Equality

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

Overview

This module contains the behavior of Mongoid’s clone/dup of documents.

Defined Under Namespace

Modules: ClassMethods

Instance Method Summary collapse

Instance Method Details

#<=>(other) ⇒ Integer

Default comparison is via the string version of the id.

Examples:

Compare two documents.

person <=> other_person

Parameters:

  • other (Document) —

    The document to compare with.

Returns:

  • (Integer) —

    -1, 0, 1.



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# File 'lib/mongoid/equality.rb', line 20

def <=>(other)
  return super unless other.is_a?(Mongoid::Equality)
  attributes["_id"].to_s <=> other.attributes["_id"].to_s
end

#==(other) ⇒ true | false

Performs equality checking on the document ids. For more robust equality checking please override this method.

Examples:

Compare for equality.

document == other

Parameters:

  • other (Document | Object) —

    The other object to compare with.

Returns:

  • (true | false) —

    True if the ids are equal, false if not.



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# File 'lib/mongoid/equality.rb', line 34

def ==(other)
  self.class == other.class &&
      attributes["_id"] == other.attributes["_id"]
end

#eql?(other) ⇒ true | false

Delegates to ==. Used when needing checks in hashes.

Examples:

Perform equality checking.

document.eql?(other)

Parameters:

  • other (Document | Object) —

    The object to check against.

Returns:

  • (true | false) —

    True if equal, false if not.



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# File 'lib/mongoid/equality.rb', line 47

def eql?(other)
  self == (other)
end