Module: Neo4j::DelayedSave

Included in:
Model
Defined in:
lib/neo4j/delayed_save.rb

Overview

Extension to Neo4j::NodeMixin to delay creating/updating properties until #save is called.

Instance Method Summary collapse

Instance Method Details

#[](key) ⇒ Object

Delegate property access to temporary properties first



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# File 'lib/neo4j/delayed_save.rb', line 25

def [](key)
  if @_unsaved_props.has_key?(key)
    @_unsaved_props[key]
  elsif @_java_node
    @_java_node[key]
  end
end

#[]=(key, value) ⇒ Object

Delegate property write to temporary properties



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# File 'lib/neo4j/delayed_save.rb', line 34

def []=(key, value)
  @_unsaved_props[key] = value
end

#id ⇒ Object 



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# File 'lib/neo4j/delayed_save.rb', line 4

def id
  persisted? ? neo_id : nil
end

#init_with_node(node) ⇒ Object

Ensure nodes loaded from the database are marked as persisted.



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# File 'lib/neo4j/delayed_save.rb', line 18

def init_with_node(node)
  super
  @persisted = true
  @_unsaved_props = {}
end

#init_without_node(props) ⇒ Object

Override NodeMixin#init_without_node to save the properties for when #save is called.



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# File 'lib/neo4j/delayed_save.rb', line 10

def init_without_node(props) # :nodoc:
  raise "Can't use Neo4j::Model with anonymous classes" if self.class.name == ""
  props[:_classname] = self.class.name
  @_unsaved_props = props || {}
  @persisted = false
end

#reload ⇒ Object Also known as: reset 



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# File 'lib/neo4j/delayed_save.rb', line 38

def reload(*)
  @_unsaved_props.clear
  self
end

#save ⇒ Object 



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# File 'lib/neo4j/delayed_save.rb', line 44

def save
  if valid?
    _run_save_callbacks do
      if @persisted
        _run_update_callbacks do
          @_unsaved_props.each {|k,v| @_java_node[k] = v }
          @_unsaved_props.clear
        end
      else
        _run_create_callbacks do
          @_java_node = Neo4j.create_node
          @_java_node._wrapper = self
          @_unsaved_props.each {|k,v| @_java_node[k] = v }
          @_unsaved_props.clear
          update_index
          Neo4j.event_handler.node_created(self)
          @persisted = true
        end
      end
    end
    true
  end
end