Django 使用笔记
- 了解 django REST framework（可以了解整个 API 设计所涉及的技术
django 最佳实践类
- django 项目里面要不要出现 controller，为什么？
django’s cache framework
design philosophy
- less code
- consistency
- extensibility
django model field
null vs blank
Field.null: If True, Django will store empty values as NULL in the database. Default is False.
Field.blank: If True, the field is allowed to be blank. Default is False.
Note that this is different than null. null is purely database-related, whereas blank is validation-related. If a field has blank=True, form validation will allow entry of an empty value. If a field has blank=False, the field will be required.
auto_now vs auto_now_add
auto_now: Automatically set the field to now every time the object is saved.
auto_now_add: when created
django 测试的坑
- 如果你 mock 了 django 的某个函数，这个函数返回的值之后要更新到数据库，这时： 一定要记得把这个 mock 掉的函数的返回值写好，不然会遇到奇怪的错误。比如碰到这种错误，大概有种*了狗的感觉
FieldError: Aggregate functions are not allowed in this query
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