Module: RDFMapper::Scope::Model

Defined in:
lib/lib/scope/model.rb

Overview

Extension of RDFMapper::Model that implements lazy-loading. All models in collections and search queries will implement this module by default.

Instance Method Summary collapse

Instance Method Details

#[](name) ⇒ Object

In addition to the original method, preloads the model.



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# File 'lib/lib/scope/model.rb', line 48

def [](name)
  @arbitrary[name] || (@loaded ? super(name) : load[name])
end

#attributes ⇒ Hash

In addition to the original method, preloads the model.

Returns:

  • (Hash) —

    all attributes of an instance (name => value)



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# File 'lib/lib/scope/model.rb', line 67

def attributes
  check_for_nil_error
  @loaded ? super : load.attributes
end

#from(adapter, options = {}) ⇒ self

Set data adapter for the query and return self. This will override the default model adapter. It is intended to be used as a chain method:

Person.find(:first).from(:rails)          #=>  #<Person:217132856>
Person.find(:first).from(:rails).name     #=>  'John'

Parameters:

  • adapter (Symbol) —

    (:rails, :sparql, :rest)

  • options (Hash) (defaults to: {}) —

    options to pass on to the adapter constructor

Returns:

  • (self) 


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# File 'lib/lib/scope/model.rb', line 40

def from(adapter, options = {})
  @loader.from(adapter, options)
  self
end

#id ⇒ Object

Returns instance’s unique ID (as RDF::URI).



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# File 'lib/lib/scope/model.rb', line 24

def id
  super || @loader.has_id? || load.id
end

#inspect ⇒ String

Developer-friendly representation of the instance.

Returns:

  • (String) 


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# File 'lib/lib/scope/model.rb', line 86

def inspect #nodoc
  "#<Scoped|%s:%s>" % [self.class, object_id]
end

#nil? ⇒ Boolean

Checks if the instance is ‘nil`. Will load the instance to find it out.

Returns:

  • (Boolean) 


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# File 'lib/lib/scope/model.rb', line 77

def nil?
  @nil or (not @loaded and load.nil?)
end

#properties ⇒ Hash

In addition to the original method, preloads the model.

Returns:

  • (Hash) —

    all attributes of an instance (name => value)



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# File 'lib/lib/scope/model.rb', line 57

def properties
  check_for_nil_error
  @loaded ? super : load.properties
end