Class: ActiveRecord::PredicateBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/composite_primary_keys/relation/predicate_builder.rb

Class Method Summary collapse

Class Method Details

.expand(klass, table, column, value) ⇒ Object 



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# File 'lib/composite_primary_keys/relation/predicate_builder.rb', line 3

def self.expand(klass, table, column, value)
  queries = []

  # Find the foreign key when using queries such as:
  # Post.where(author: author)
  #
  # For polymorphic relationships, find the foreign key and type:
  # PriceEstimate.where(estimate_of: treasure)
  if klass && reflection = klass._reflect_on_association(column)
    base_class = polymorphic_base_class_from_value(value)

    if reflection.polymorphic? && base_class
      queries << build(table[reflection.foreign_type], base_class)
    end

    column = reflection.foreign_key

    # CPK
    # if base_class
    if base_class && !(Base === value && value.composite?)
      primary_key = reflection.association_primary_key(base_class)
      value = convert_value_to_association_ids(value, primary_key)
    end
  end

  #CPK
  if Base === value && value.composite?
    queries << cpk_id_predicate(table, column, value.id)
  else
    queries << build(table[column], value)
  end
  queries
end