Exception: Motion::UpgradeNotImplementedError

Inherits:
ComponentError show all
Defined in:
lib/motion/errors.rb

Instance Attribute Summary collapse

Attributes inherited from ComponentError

#component

Instance Method Summary collapse

Constructor Details

#initialize(component, previous_revision, current_revision) ⇒ UpgradeNotImplementedError

Returns a new instance of UpgradeNotImplementedError.



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# File 'lib/motion/errors.rb', line 109

def initialize(component, previous_revision, current_revision)
  super(
    component,
    "Cannot upgrade `#{component.class}` from a previous revision of the " \
    "application (#{previous_revision}) to the current revision of the " \
    "application (#{current_revision})\n" \
    "\n" \
    "By default, Motion does not allow components from other revisions " \
    "of the application to be mounted because new code with old state " \
    "can lead to unpredictable and unsafe behavior.\n" \
    "\n" \
    "Hint: If you would like to allow this component to survive " \
    "deployments, consider providing an alternative implimentation for " \
    "`#{component.class}.upgrade_from`."
  )

  @previous_revision = previous_revision
  @current_revision = current_revision
end

Instance Attribute Details

#current_revision ⇒ Object (readonly)

Returns the value of attribute current_revision.



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# File 'lib/motion/errors.rb', line 106

def current_revision
  @current_revision
end

#previous_revision ⇒ Object (readonly)

Returns the value of attribute previous_revision.



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# File 'lib/motion/errors.rb', line 106

def previous_revision
  @previous_revision
end