Class: PresenterObject::Base

Inherits:
Object
  • Object
show all
Defined in:
lib/presenter_object/base.rb

Overview

Presenter superclass. Create your own presenter by sub-classing PresenterObject::Base and declaring the name of the model it will present.

e.g:

class DocumentPresenter << PresenterObject::Base
  presents :document

 .. add instance methods here ..
end

Create a presenter instance by giving it a model instance e.g:

document = DocumentPresenter.new Document.find(params[:id]) 
document.sender # can call any document model methods...
document.pretty_sender # ...as well as any presenter defined method
document.class # is the wrapped object's class, helps it behave like models do in forms, link helpers etc.

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(object, view_context = nil) ⇒ Base

Returns a new instance of Base.



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# File 'lib/presenter_object/base.rb', line 37

def initialize(object, view_context = nil)
  @object = object
  @class = object.class # impersonate object's class
  @to_param = object.id # let link helpers know the object's id
  @view_context = view_context
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(name, *args, &block) ⇒ Object 



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# File 'lib/presenter_object/base.rb', line 44

def method_missing(name, *args, &block)
  if @object.respond_to? name
    @object.send name, *args, &block
  elsif @view_context.respond_to? name
    @view_context.send name, *args, &block
  else
    super
  end
end

Instance Attribute Details

#class ⇒ Object (readonly)

Returns the value of attribute class.



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# File 'lib/presenter_object/base.rb', line 35

def class
  @class
end

#object ⇒ Object (readonly)

Returns the value of attribute object.



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# File 'lib/presenter_object/base.rb', line 35

def object
  @object
end

#to_param ⇒ Object (readonly)

Returns the value of attribute to_param.



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# File 'lib/presenter_object/base.rb', line 35

def to_param
  @to_param
end

#view_context ⇒ Object (readonly)

Returns the value of attribute view_context.



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# File 'lib/presenter_object/base.rb', line 35

def view_context
  @view_context
end

Class Method Details

.presented_class ⇒ Object 



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# File 'lib/presenter_object/base.rb', line 26

def presented_class
  @presented_class ||= @class_name.constantize
end

.presenters ⇒ Object 



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# File 'lib/presenter_object/base.rb', line 30

def presenters
  @@presenters ||= {}
end

.presents(class_name) ⇒ Object 



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# File 'lib/presenter_object/base.rb', line 21

def presents(class_name)
  @class_name = class_name.to_s.classify
  presenters[@class_name] = self
end

Instance Method Details

#respond_to?(name, include_private = false) ⇒ Boolean

Returns:



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# File 'lib/presenter_object/base.rb', line 54

def respond_to?(name, include_private = false)
  if @object.respond_to?(name, include_private) || @view_context.respond_to?(name, include_private)
    true
  else
    super
  end
end