fastapi:第二十二章：模板中的选择结构和循环结构

一，选择结构

python代码:

# app/api/users.py
from fastapi import APIRouter, Depends
from starlette.requests import Request
from starlette.templating import Jinja2Templates

from app.core.Settings import get_settings
from app.core.templates import templates
from app.middleware.log_single_route import log_this_route

# 创建路由器实例
# prefix：所有路由的统一前缀，避免重复写"/users"
# tags：在Swagger文档中分组显示
router = APIRouter(prefix="/users", tags=["用户管理"])

@router.get("/one")
def get_user(request: Request,user_id: int = 1,name: str = None):
    """根据ID获取单个用户"""
    # print(name)
    return templates.TemplateResponse(
        request = request,
        name="user_all.html",
        context={"username": f"{name}", "title": "象牙山村委会"}
    )

html代码:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>{{ title }}</title>
</head>
<body>
    <h1>Hello, {{ username }}!</h1>
    {% if username == '谢广坤' %}
        <p>世界第一作精</p>
    {% elif username == '赵四' %}
        <p>亚洲舞王，尼古拉斯</p>
    {% else %}
        <p>刘能：象牙山小诸葛</p>
    {% endif %}

    <p>Welcome to your FastAPI web application.</p>
</body>
</html>

测试效果:

image

二，循环结构 

python代码:

@router.get("/one")
def get_user(request: Request,user_id: int = 1,name: str = None):
    """根据ID获取单个用户"""

    users = ['王大拿','马大帅','王富贵']
    books = [
        {
            'name': '三国演义',
            'author': '罗贯中',
            'price': 110
        }, {
            'name': '西游记',
            'author': '吴承恩',
            'price': 109
        }, {
            'name': '红楼梦',
            'author': '曹雪芹',
            'price': 120
        }, {
            'name': '水浒传',
            'author': '施耐庵',
            'price': 119
        }
    ]


    return templates.TemplateResponse(
        request = request,
        name="user_all.html",
        context = {"users": users, "books": books, "title": "象牙山村委会"}
    )

html代码:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>{{ title }}</title>
</head>
<body>

 <ul>
        {% for user in users|reverse %}
            <li>{{ user }}</li>
        {% else %}
            <li>沒有任何值</li>
        {% endfor %}
    </ul>


    <table>
        <thead>
            <tr>
                <th>序号</th>
                <th>书名</th>
                <th>作者</th>
                <th>价格</th>
                <th>总数</th>
            </tr>
        </thead>
        <tbody>
            {% for book in books %}
                {% if loop.first %}
                    <tr style="background: red;">
                {% elif loop.last %}
                    <tr style="background: pink;">
                {% else %}
                    <tr>
                {% endif %}
                    <td>{{ loop.index0 }}</td>
                    <td>{{ book.name }}</td>
                    <td>{{ book.author }}</td>
                    <td>{{ book.price }}</td>
                    <td>{{ loop.length }}</td>
                </tr>
            {% endfor %}
        </tbody>
    </table>



</body>
</html>

测试效果:

image

 

posted @ 2026-06-12 10:52  刘宏缔的架构森林  阅读(3)  评论(0)    收藏  举报