Class: Tagcrumbs::Proxy

Inherits:
Object
  • Object
show all
Defined in:
lib/tagcrumbs/proxy.rb

Overview

The Proxy class is used in resource associations to delay loading of a resource for as long as possible. Some method calls are directly forwarded to the resource, for others the resource is loaded first from the webservice and afterwards the call is made. The Proxy tries to be as transparent as possible so that you basically never know that you have a proxy object instead of a real resource.

Constant Summary collapse

UNPROXIED_METHODS =

TODO: figure out what other methods might be needed?

[:reload, :resource_url, :properties, :loaded?, :class]

Instance Method Summary collapse

Constructor Details

#initialize(object, parameters = {}) ⇒ Proxy

Returns a new instance of Proxy.



11
12
13
14
 
# File 'lib/tagcrumbs/proxy.rb', line 11

def initialize(object, parameters={})
  @object = object
  @parameters = parameters
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

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

Forward all method calls to the proxied object, reload if necessary



18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
 
# File 'lib/tagcrumbs/proxy.rb', line 18

def method_missing(method_name, *args, &block)
  #puts "** Proxying #{method_name}. Loaded: #{@object.loaded?}"
  
  if @object.loaded? || UNPROXIED_METHODS.include?(method_name) #|| [email protected]_to?(method_name) # having this doesn't allow first etc on collections
    @object.send(method_name, *args, &block)
  elsif method_name == :total_entries && @object.respond_to?(method_name) && @object.total_entries.present? # let total_entries go through if present
    @object.total_entries
  else 
    #puts "** Reloading"
    @object.reload(nil, @parameters) if @object.resource_url.present?
    @object.send(method_name, *args, &block)
  end
  
  
end