Module: Neo::Rails::Exposure

Extended by:
ActiveSupport::Concern
Defined in:
lib/neo/rails/exposure.rb

Overview

A really simple version of exposing variables to the view. Bases on attr_reader and helper_method.

Defined Under Namespace

Modules: ClassMethods Classes: UndeclaredVariableError

Instance Method Summary collapse

Instance Method Details

#expose(key, value = nil) ⇒ Object

Expose an assign at the instance level.

If the value is given with a block, just execute the block if a value was not set yet.

Raise UndeclaredVariableError if access variable wasn’t declared before.

Raises:



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# File 'lib/neo/rails/exposure.rb', line 33

def expose(key, value=nil)
  name = key.to_sym
  raise UndeclaredVariableError unless self.class.exposed_vars.include?(name)

  value = yield if block_given?

  self.instance_variable_set("@#{name}", value)
end