flask_sqlalchemy 分页（一）

database.py

from flask_sqlalchemy import SQLAlchemy

db = SQLAlchemy()

config.py

import os
from database import db
from flask import Flask

basedir=os.path.abspath(os.path.dirname(__name__))


app = Flask(__name__)
#Dabase configuration

app.config['SQLALCHEMY_DATABASE_URI'] = os.environ.get('DATABASE_URI') or 'sqlite:///'+ os.path.join(basedir,'app.db')
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
db.init_app(app)

models.py

from database import db
from config import app

class StudentMore(db.Model):
    __tablename__= 'Students'
    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
    name = db.Column(db.String(108), nullable=False)
    score = db.Column(db.Integer, nullable=False)
    
    def __repr__(self):
        return 'StudentMore  %r' % self.name
    
    
with app.app_context():
    db.create_all()

 

app.py

from flask import Flask,render_template
from flask import redirect
from flask import url_for
from database import db
from config import app
from models import StudentMore
 
@app.route('/stu/query/<int:page>', methods=['GET'])
def query_stu(page=None):
    if not page:
        page = 1
    students = StudentMore.query.paginate(page=page,per_page=5)
    # page是第几页，per_page是将每5个一页
 
    db.session.commit()
 
    # students.items是分页展示的数据
    return render_template("student.html", studentList=students.items,  pagination=students)
 
 
@app.route('/')
def index():
    return redirect(url_for("query_stu",page=1))
 
 
if __name__=="__main__":
    app.run(debug=True)

templates/page.html

<!--这个是分页展示下面的页码-->
 
{%macro my_paginate(pagination,url)%}
 
<nav>
    <ul class="pagination">
 
        {%if pagination.has_prev%}
        <li class="page-item active"><a class="page-link" href="{{url_for(url,page=pagination.page-1)}}">上一页</a></li>
        {%else%}
        <li class="page-item disabled"><a class="page-link" href="#">上一页</a></li>
        {%endif%}
 
            {%for page in pagination.iter_pages()%}
                {%if page%}
                    <li class="page-item {%if page==pagination.page%}active{%endif%}"><a class="page-link" href="{{url_for(url,page=page)}}">{{page}}</a></li>
                {%else%}
                    <li class="page-item disabled"><a class="page-link" href="#">…</a></li>
                {%endif%}
 
            {%endfor%}
 
        {%if pagination.has_next%}
        <li class="page-item active"><a class="page-link" href="{{url_for(url,page=pagination.page+1)}}">下一页</a></li>
        {%else%}
        <li class="page-item disabled"><a class="page-link" href="#">下一页</a></li>
        {%endif%}
 
    </ul>
</nav>
{%endmacro%}

　　

student.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>学生</title>
    <style>
        ul {
            margin: auto;
            width: 241px;
        }
        ul li {
            float: left;
            margin-right: 16px;
            list-style: none;
        }
        ul li a {
            text-decoration: none;
 
        }
        ul li a:hover {
            color: orange;
        }
        .active a{
            color: red ;
        }
        .disabled a {
            color: gray ;
        }
    </style>
</head>
<body>
     <div align="center">
        <h2>用户信息</h2>
        <br><br>
        {% for stu in studentList %}
            编号：{{ stu['id'] }}，姓名：{{ stu['name'] }}，成绩：{{ stu['score'] }}    <br><br>
        {% endfor %}
 
    </div>
 
<!--     导入下面的页码-->
    {%import 'page.html' as pg%}
    {{pg.my_paginate(pagination,'query_stu')}}
<!--query_stu是对应的方法名称是什么，然后在点击页码时可以找到该方法，从而展示数据-->
 
</body>
</html>

　　

　　

　　

　　

　　

posted @ 2024-10-09 13:06  tec2019  阅读(91)  评论(0)    收藏  举报