Class: ActiveRecord::Associations::AssociationScope

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

Instance Method Summary collapse

Instance Method Details

#last_chain_scope(scope, table, reflection, owner, tracker, assoc_klass) ⇒ Object 



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# File 'lib/composite_primary_keys/associations/association_scope.rb', line 23

def last_chain_scope(scope, table, reflection, owner, tracker, assoc_klass)
  join_keys = reflection.join_keys(assoc_klass)
  key = join_keys.key
  foreign_key = join_keys.foreign_key

  if key.kind_of?(Array) || foreign_key.kind_of?(Array)
    predicate = cpk_join_predicate(table, key, owner, foreign_key)
    scope = scope.where(predicate)
  else
    bind_val = bind scope, table.table_name, key.to_s, owner[foreign_key], tracker
    scope    = scope.where(table[key].eq(bind_val))
  end

  if reflection.type
    value    = owner.class.base_class.name
    bind_val = bind scope, table.table_name, reflection.type, value, tracker

    scope.where(table[reflection.type].eq(bind_val))
  else
    scope
  end
end

#next_chain_scope(scope, table, reflection, tracker, assoc_klass, foreign_table, next_reflection) ⇒ Object 



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# File 'lib/composite_primary_keys/associations/association_scope.rb', line 5

def next_chain_scope(scope, table, reflection, tracker, assoc_klass, foreign_table, next_reflection)
  join_keys = reflection.join_keys(assoc_klass)
  key = join_keys.key
  foreign_key = join_keys.foreign_key

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

  if reflection.type
    value    = next_reflection.klass.base_class.name
    bind_val = bind scope, table.table_name, reflection.type, value, tracker
    scope    = scope.where(table[reflection.type].eq(bind_val))
  end

  scope.joins(join(foreign_table, constraint))
end