[FastAPI-18]Filed请求体校验

import random

from fastapi import FastAPI
from pydantic import Field, BaseModel
import typing

app = FastAPI()

'''
请求体的每一个字段需要单独校验
name 长度最少3位
price 不少于10
tags 元素不重复，元素个数
{
    "name": "book",
    "description": "python",
    "price": 42.0,
    "tax": 3.2,
    "tags": ["rock","metal","bar"]
}
'''


class ItemTags(BaseModel):
    name: str = Field(min_length=3, example="Tom")
    description: str
    price: float = Field(ge=10, example=18)
    tax: float
    tags: typing.List[str] = Field(min_items=3, max_items=5, unique_items=True)
    # 默认随机值
    discount: int = Field(default_factory=lambda: random.randint(1, 9))


@app.post("/item")
def create_item(item: ItemTags):
    return item