Class: Relation::Custom

Inherits:
Relation
  • Object
show all
Defined in:
app/models/relation/custom.rb

Overview

When a new subject is created, a initial set of relations is created for him. Afterwards, the subject can customize them and adapt them to his own preferences.

Default relations are defined at config/relations.yml

Constant Summary collapse

CONFIG =

Default relations are defined in this configuration file

File.join(::Rails.root, 'config', 'relations.yml')

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Relation

allow, allow?, #mode, normalize, normalize_id

Class Method Details

.config ⇒ Object

Relations configuration



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# File 'app/models/relation/custom.rb', line 23

def config
  @config ||= YAML.load_file(CONFIG)
end

.defaults_for(actor) ⇒ Object 



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# File 'app/models/relation/custom.rb', line 27

def defaults_for(actor)
  cfg_rels = config[actor.subject_type.underscore]

  if cfg_rels.nil?
    raise "Undefined relations for subject type #{ actor.subject_type }. Please, add an entry to #{ CONFIG }"
  end

  rels = {}

  cfg_rels.each_pair do |name, cfg_rel|
    rels[name] =
      create! :actor =>         actor,
              :name  =>         cfg_rel['name'],
              :receiver_type => cfg_rel['receiver_type']

    if (ps = cfg_rel['permissions']).present?
      ps.each do |p| 
        rels[name].permissions << 
          Permission.find_or_create_by_action_and_object(*p)
      end 
    end
  end

  # Parent, relations must be set after creation
  # FIXME: Can fix with ruby 1.9 and ordered hashes
  cfg_rels.each_pair do |name, cfg_rel|
    rels[name].update_attribute(:parent, rels[cfg_rel['parent']])
  end

  rels.values
end

.strongest ⇒ Object

A relation in the top of a strength hierarchy



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# File 'app/models/relation/custom.rb', line 60

def strongest
  roots
end

Instance Method Details

#<=>(rel) ⇒ Object

Compare two relations



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# File 'app/models/relation/custom.rb', line 66

def <=> rel
  return -1 if rel.is_a?(Public)

  if ancestor_ids.include?(rel.id)
    1
  elsif rel.ancestor_ids.include?(id)
    -1
  else
    0
  end
end

#stronger ⇒ Object

Other relations above in the same hierarchy that this relation



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# File 'app/models/relation/custom.rb', line 89

def stronger
  ancestors
end

#stronger_or_equal ⇒ Object

Relations above or at the same level of this relation



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# File 'app/models/relation/custom.rb', line 94

def stronger_or_equal
  path
end

#weaker ⇒ Object

Other relations below in the same hierarchy that this relation



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# File 'app/models/relation/custom.rb', line 79

def weaker
  descendants
end

#weaker_or_equal ⇒ Object

Relations below or at the same level of this relation



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# File 'app/models/relation/custom.rb', line 84

def weaker_or_equal
  subtree
end