Module: MmPartialUpdate::Plugins::PartialUpdate::InstanceMethods

Defined in:
lib/mm_partial_update/plugins/partial_update.rb

Instance Method Summary collapse

Instance Method Details

#add_updates_to_command(command) ⇒ Object 



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# File 'lib/mm_partial_update/plugins/partial_update.rb', line 57

def add_updates_to_command(command)

  selector = respond_to?(:database_selector) ? database_selector : nil

  add_create_self_to_command(selector, command) and return if new?

  field_changes = persistable_changes

  associations.values.each do |association|
    if proxy = self.instance_variable_get(association.ivar)
      association_changes = field_changes.delete(association.name)
      proxy.add_updates_to_command(association_changes, command) if
        proxy.respond_to?(:add_updates_to_command)
    end
  end

  field_changes = field_changes.inject({}) do |changes,change|
    changes[change[0]] = change[-1][-1]
    changes
  end
  command.tap {|c|c.set(selector,field_changes)}
end

#create_or_update_changes(options = {}) ⇒ Object 



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# File 'lib/mm_partial_update/plugins/partial_update.rb', line 41

def create_or_update_changes(options={})
  #assert_root_saved
  update_comment = execute_command(options)
  #callbacks and changes_only are not valid
  # options for regular MongoMapper saves.
  # clear_changes_to_subtree will pass this options
  # hash to downstream saves, which can errors
  # so they need to be removed
  options.reject!{ |k,v|[:callbacks, :changes_only].include?(k)}
  clear_changes_to_subtree(options)
end

#persistable_changes ⇒ Object

Since we are going to persist the values directly from the changes hash, we need to make sure they are propertly readied for storage



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# File 'lib/mm_partial_update/plugins/partial_update.rb', line 83

def persistable_changes
  changes.tap do |persistable_changes|
    persistable_changes.each_pair do |key_name, value|
      if (key = keys[key_name])
        value[-1] = key.set(value[-1])
      end
    end
  end
end

#prepare_update_command ⇒ Object 



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# File 'lib/mm_partial_update/plugins/partial_update.rb', line 53

def prepare_update_command
  UpdateCommand.new(self).tap { |command| add_updates_to_command(command) }
end

#save_changes(options = {}) ⇒ Object 



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# File 'lib/mm_partial_update/plugins/partial_update.rb', line 30

def save_changes(options={})
  options.assert_valid_keys(:validate, :callbacks, :safe, :changes_only)
  options.reverse_merge!(:validate=>true, :callbacks=>true)
  !options[:validate] || valid? ? create_or_update_changes(options) : false
end

#save_changes!(options = {}) ⇒ Object 



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# File 'lib/mm_partial_update/plugins/partial_update.rb', line 36

def save_changes!(options={})
  options.assert_valid_keys(:callbacks, :safe, :changes_only)
  save_changes(options) || raise(MongoMapper::DocumentNotValid.new(self))
end