Class: Mongoid::Matchable::Exists

Inherits:

Default

• Object
• Default
• Mongoid::Matchable::Exists

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

• #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.

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

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

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