Class: Toast::Resource

Inherits:
Object
  • Object
show all
Defined in:
lib/toast/resource.rb

Overview

Represents a resource. There are following resource types as sub classes: Record, RootCollection, AssociateCollection, Attribute

Direct Known Subclasses

Association, Attribute, Record, RootCollection, Single

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Resource

Returns a new instance of Resource.



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# File 'lib/toast/resource.rb', line 15

def initialize
  raise 'ToastResource#new: use #build to create an instance'
end

Instance Attribute Details

#media_type ⇒ Object

Returns the value of attribute media_type.



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# File 'lib/toast/resource.rb', line 13

def media_type
  @media_type
end

Class Method Details

.build(params, request) ⇒ Object 



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# File 'lib/toast/resource.rb', line 19

def self.build params, request

  resource_name = params[:resource]
  id = params[:id]
  subresource_name = params[:subresource]
  format = params[:format]

  begin
    
    model = get_class_by_resource_name resource_name
            
    # base is complete URL until the resource name
    model.uri_base = request.url.match(/(.*)\/#{resource_name}(?:\..+|\/|\z)/)[1]

    # decide which sub type
    rsc = if id.nil? and model.toast_config.singles.include?(subresource_name)
            Toast::Single.new(model, subresource_name, params.clone)                 
          elsif id.nil?
            Toast::RootCollection.new(model, subresource_name, params.clone)
          elsif subresource_name.nil?
            Toast::Record.new(model, id, format)
          elsif model.toast_config.exposed_associations.include? subresource_name
            Toast::Association.new(model, id, subresource_name, format)                
          elsif model.toast_config.exposed_attributes.include? subresource_name
            Toast::Attribute.new(model, id, subresource_name, format)
          else
            raise ResourceNotFound
          end

    rsc.media_type = request.media_type

    rsc
  rescue NameError
    raise ResourceNotFound
  end
end

.get_class_by_resource_name(name) ⇒ Object 



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# File 'lib/toast/resource.rb', line 56

def self.get_class_by_resource_name name
  begin
    model = name.singularize.classify.constantize # raises NameError

    unless ((model.superclass == ActiveRecord::Base) and model.is_resourceful_model?)
      raise ResourceNotFound
    end

    model

  rescue NameError
    raise ResourceNotFound
  end
end

Instance Method Details

#apply(method, payload) ⇒ Object

Raises:



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# File 'lib/toast/resource.rb', line 71

def apply method, payload

  raise MethodNotAllowed if self.model.toast_config.disallow_methods.include?(method.downcase)
  
  case method
  when "PUT","POST"
    self.send(method.downcase, ActiveSupport::JSON.decode(payload))
  when "DELETE","GET"
    self.send(method.downcase)
  else
    raise MethodNotAllowed
  end            
end