Class: ActiveRecord::Reflection::AbstractReflection

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

Direct Known Subclasses

ThroughReflection

Instance Method Summary collapse

Instance Method Details

#join_scope(table, foreign_table, foreign_klass) ⇒ Object 



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# File 'lib/composite_primary_keys/reflection.rb', line 4

def join_scope(table, foreign_table, foreign_klass)
  predicate_builder = predicate_builder(table)
  scope_chain_items = join_scopes(table, predicate_builder)
  klass_scope       = klass_join_scope(table, predicate_builder)

  if type
    klass_scope.where!(type => foreign_klass.polymorphic_name)
  end

  scope_chain_items.inject(klass_scope, &:merge!)

  key         = join_primary_key
  foreign_key = join_foreign_key

  # CPK
  #klass_scope.where!(table[key].eq(foreign_table[foreign_key]))
  constraint = cpk_join_predicate(table, key, foreign_table, foreign_key)
  klass_scope.where!(constraint)

  if klass.finder_needs_type_condition?
    klass_scope.where!(klass.send(:type_condition, table))
  end

  klass_scope
end