scope_for_create

# File activerecord/lib/active_record/relation.rb, line 791
    def scope_for_create
      hash = where_clause.to_h(klass.table_name, equality_only: true)
      create_with_value.each { |k, v| hash[k.to_s] = v } unless create_with_value.empty?
      hash
    end