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>
