Class: Correlate::Relationships::ActiveRecord

Inherits:
Object
  • Object
show all
Defined in:
lib/correlate/relationships/active_record.rb,
lib/correlate/relationships/active_record/collection_proxy.rb

Overview

Used to define relationships between ActiveRecord::Base models and CouchRest::ExtendedDocument classes.

Important note

Unlike normal correlations, when correlating an ActiveRecord model with a CouchRest document, the ‘reverse correlation’ needs to be specified in in the CouchRest model.

See Also:

Defined Under Namespace

Classes: CollectionProxy

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(klass) ⇒ ActiveRecord

Returns a new instance of ActiveRecord.



30
31
32
 
# File 'lib/correlate/relationships/active_record.rb', line 30

def initialize( klass )
  @klass = klass
end

Class Method Details

.configure!(klass, &block) ⇒ Object 



21
22
23
24
25
26
 
# File 'lib/correlate/relationships/active_record.rb', line 21

def configure!( klass, &block )

  # Setup our conveniences
  relationships = new( klass )
  relationships.instance_eval( &block )
end

Instance Method Details

#a(name, options = {}) ⇒ Object

Specify that this model will have a single document of said relationship. This is akin to ActiveRecord’s belongs_to or has_one associations.

Examples:

Defining correlations and using them

class MyModel < ActiveRecord::Base
  include Correlate

  related_to do
    a :journal, :class => 'Journal', :rel => 'my_model'
  end
end

class Journal < CouchRest::ExtendedDocument
  include Correlate

  related_to do
    some :my_models, :class => 'MyModel', :rel => 'my_model'
  end
end

doc = Journal.new
doc.my_models # => []

me = MyModel.find( 1 )
doc.my_models << me

doc.my_models # => [ <MyModel#12121212> ]

me.journal # => <Journal#121212121>

Parameters:

  • name (Symbol) —

    of the relationship

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

    for the relationship

Options Hash (options):

  • :class (String) —

    the class of the related document/model

  • :rel (String) — default: name —

    the value of the rel key in the related hash

  • :id_method (Symbol) — default: :id —

    name of a method use to retrieve the ‘foreign key’ value from documents added to the relationship

  • :load_via (Symbol) — default: :get —

    name of the class method used to retreive related documents



123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
 
# File 'lib/correlate/relationships/active_record.rb', line 123

def a( name, options = {} )
  options[:source] = @klass

  @klass.correlations << Correlate::Relationships.build_correlation( name, :a, options )

  @klass.class_eval "    def \#{name}=( object )\n      self.links.replace( object )\n    end\n\n    def \#{name}( raw = false )\n      correlation = self.links.rel( '\#{name}' ).first\n      return if correlation.nil?\n\n      correlation = self.class.correlation_for( correlation ).correlate( correlation ) unless raw\n\n      correlation\n    end\n  EOF\nend\n", __FILE__, __LINE__

#some(*args) ⇒ Object

Specify that this model will have multiple documents of said relationship. This is akin to ActiveRecord’s has_many associations

Examples:

Defining correlations and using them

class MyModel < ActiveRecord::Base
  include Correlate

  related_to do
    some :other_documents, :class => 'OtherDocument', :rel => 'my_model'
  end
end

class OtherDocument < CouchRest::ExtendedDocument
  include Correlate

  related_to do
    a :my_model, :class => 'MyModel'
  end
end

doc = OtherDocument.new
doc.my_model # => nil

me = MyModel.find( 1 )
doc.my_model = me

doc.me_model # => <MyModel#12121212>

me.other_documents # => [ <OtherDocument#121212121> ]

Parameters:

  • name (Symbol) —

    of the relationship

  • options (Hash) —

    for the relationship



70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
 
# File 'lib/correlate/relationships/active_record.rb', line 70

def some( *args )
  name = args.shift
  opts = args.empty? ? {} : args.last
  opts[:source] = @klass

  correlation = Correlate::Relationships.build_correlation( name, :some, opts )
  @klass.correlations << correlation

  @klass.class_eval "    def \#{name}( raw = false )\n      local_correlation = self.class.correlations.detect { |c| c.name == :\#{name} }\n\n      Correlate::Relationships::ActiveRecord::CollectionProxy.new self, local_correlation\n    end\n  EOF\nend\n", __FILE__, __LINE__