Class: Mongoid::Matchable::Exists

Inherits:
Default
  • Object
show all
Defined in:
lib/mongoid/matchable/exists.rb

Overview

Checks for existance.

Since:

  • 4.0.0

Instance Attribute Summary

Attributes inherited from Default

#attribute, #document

Instance Method Summary collapse

Methods inherited from Default

#initialize

Constructor Details

This class inherits a constructor from Mongoid::Matchable::Default

Instance Method Details

#matches?(value) ⇒ true, false

Return true if the attribute exists and checking for existence or return true if the attribute does not exist and checking for non-existence.

Examples:

Does anything exist?

matcher.matches?({ :key => 10 })

Parameters:

  • value (Hash)

    The values to check.

Returns:

  • (true, false)

    If a value exists.

Since:

  • 4.0.0


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# File 'lib/mongoid/matchable/exists.rb', line 18

def matches?(value)
  @attribute.nil? != value.values.first
end