所需文件
- active_record/relation/predicate_builder/array_handler
- active_record/relation/predicate_builder/basic_object_handler
- active_record/relation/predicate_builder/range_handler
- active_record/relation/predicate_builder/relation_handler
- active_record/relation/predicate_builder/association_query_value
- active_record/relation/predicate_builder/polymorphic_array_value
命名空间
- 模块 ActiveRecord
- 模块 Arel
- 类 ActiveRecord::Relation