Class: Flounder::Relation

Inherits:
Object
  • Object
show all
Includes:
Helpers::Entity
Defined in:
lib/flounder/relation.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Helpers::Entity

#convert_to_entity, #entity_like?

Constructor Details

#initialize(domain, type, name, entity_ref, join_conditions) ⇒ Relation

Returns a new instance of Relation.



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# File 'lib/flounder/relation.rb', line 8

def initialize domain, type, name, entity_ref, join_conditions
  @domain, @type, @name, @entity_ref, @join_conditions = 
    domain, type, name, entity_ref, join_conditions
end

Instance Attribute Details

#domain ⇒ Object

Returns the value of attribute domain.



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# File 'lib/flounder/relation.rb', line 5

def domain
  @domain
end

#entity_ref ⇒ Object

Returns the value of attribute entity_ref.



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# File 'lib/flounder/relation.rb', line 6

def entity_ref
  @entity_ref
end

#join_conditions ⇒ Object

Returns the value of attribute join_conditions.



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# File 'lib/flounder/relation.rb', line 6

def join_conditions
  @join_conditions
end

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/flounder/relation.rb', line 6

def name
  @name
end

#type ⇒ Object

Returns the value of attribute type.



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# File 'lib/flounder/relation.rb', line 5

def type
  @type
end

Instance Method Details

#apply(query) ⇒ Object 



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# File 'lib/flounder/relation.rb', line 27

def apply query
  query.
    join(linked_entity).
    on(join_conditions)
end

#linked_entity ⇒ Object 



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# File 'lib/flounder/relation.rb', line 13

def linked_entity
  @linked_entity ||= begin
    entity = convert_to_entity(entity_ref)

    if name != entity_ref
      # TODO maybe using name for both singular and plural is not a good
      # idea. Maybe it is.
      entity = entity.as(name, name)
    end

    entity
  end
end