Exception: CanCan::AccessDenied

Inherits:
Error
  • Object
show all
Defined in:
lib/cancan/exceptions.rb

Overview

This error is raised when a user isn't allowed to access a given controller action. This usually happens within a call to ControllerAdditions#authorize! but can be raised manually.

raise CanCan::AccessDenied.new("Not authorized!", :read, Article)

The passed message, action, and subject are optional and can later be retrieved when rescuing from the exception.

exception.message # => "Not authorized!"
exception.action # => :read
exception.subject # => Article

If the message is not specified (or is nil) it will default to “You are not authorized to access this page.” This default can be overridden by setting default_message.

exception.default_message = "Default error message"
exception.message # => "Default error message"

See ControllerAdditions#authorized! for more information on rescuing from this exception and customizing the message using I18n.

Instance Attribute Summary (collapse)

Instance Method Summary (collapse)

Constructor Details

- (AccessDenied) initialize(message = nil, action = nil, subject = nil)

Returns a new instance of AccessDenied



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# File 'lib/cancan/exceptions.rb', line 39

def initialize(message = nil, action = nil, subject = nil)
  @message = message
  @action = action
  @subject = subject
  @default_message = I18n.t(:unauthorized.default", :default => "You are not authorized to access this page.")
end

Instance Attribute Details

- (Object) action (readonly)

Returns the value of attribute action



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# File 'lib/cancan/exceptions.rb', line 36

def action
  @action
end

- (Object) default_message=(value) (writeonly)

Sets the attribute default_message

Parameters:

  • value

    the value to set the attribute default_message to.



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# File 'lib/cancan/exceptions.rb', line 37

def default_message=(value)
  @default_message = value
end

- (Object) subject (readonly)

Returns the value of attribute subject



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# File 'lib/cancan/exceptions.rb', line 36

def subject
  @subject
end

Instance Method Details

- (Object) to_s



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# File 'lib/cancan/exceptions.rb', line 46

def to_s
  @message || @default_message
end