Class: Gizmo::Modify

Inherits:
BaseOperation show all
Defined in:
lib/gizmo/modify.rb

Instance Attribute Summary

Attributes inherited from BaseOperation

#context

Instance Method Summary collapse

Methods inherited from BaseOperation

#create_response, #default_status, #initialize, #set_response_headers

Constructor Details

This class inherits a constructor from Gizmo::BaseOperation

Instance Method Details

#call(criteria, id, attrs, update_strategy = nil) ⇒ Gizmo::Response

Modify a single item using the provided criteria.

does a mass update of attributes, which is not always ideal. A block can be given which will be passed two parameters: the item to update and the attributes. The block must return the data it wishes to send back in the response.

Parameters:

  • criteria (Mongoid::Criteria) —

    the criteria to use for finding the item to update

  • id (String, Moped::BSON::ObjectId) —

    the ID of the item being updated

  • attrs (Hash) —

    the attributes used to update an existing instance

  • update_strategy (Proc) (defaults to: nil) —

    The default update strategy

Returns:



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# File 'lib/gizmo/modify.rb', line 15

def call(criteria, id, attrs, update_strategy=nil)
  attrs.delete '_id'

  response = create_response
  #TODO: refactor this pattern
  if criteria.is_a? Mongoid::Criteria
    item = criteria.where(:id=>id).first
    raise Mongoid::Errors::DocumentNotFound.new(criteria.klass, :id=>id) if item.nil?
  else
    item = criteria.find id
  end

  if update_strategy.nil?
    item.update_attributes!(attrs)
  else
    item = update_strategy.call item, attrs
  end
  response.data = item
  response
end