Flowdock
toggle(attribute) public

Assigns to attribute the boolean opposite of attribute?. So if the predicate returns true the attribute will become false. This method toggles directly the underlying value without calling any setter. Returns self.

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April 12, 2009
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Takes attribute as a symbol

Attribute must be passed as a symbol:

User.toggle(:funny)

not

User.toggle(funny)
March 11, 2010
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Skips validations and callbacks

The method skips validations and callbacks. That is why it should be used with caution.

Code example 

person.toggle :active