Getting Started - 入门Model Basics - 模型基础Model Instances - 模型实例Model Querying - Basics - 模型查询(基础)Model Querying - Finders - 模型查询(查找器)Getters, Setters & Virtuals - 获取器, 设置器 & 虚拟字段Validations & Constraints - 验证 & 约束Raw Queries - 原始查询Associations - 关联Paranoid - 偏执表