【发布时间】：2021-07-11 16:54:36
【问题描述】：
我正在尝试实现分页，我找到了可行的解决方案，但在 SQLLite 中，我想要一个 MySQL 数据库的解决方案。我正在努力添加Employees.query.paginate，因为它在 MySQL 数据库中根本不起作用。我没有可以调用的类，所以我的问题是如何省略它以及哪段代码将起作用？我在 Google 中浏览了多个页面，但没有找到任何可行的方法（或者显然我无法正确实现它）。
app.py 取自here
from flask import Flask, render_template
from flask_sqlalchemy import SQLAlchemy
app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///blog.db'
app.config['SECRET_KEY'] = 'secret key'
db = SQLAlchemy(app)
class Employees(db.Model):
id = db.Column(db.Integer, primary_key=True)
fullname = db.Column(db.String(150))
position = db.Column(db.String(150))
office = db.Column(db.String(150))
age = db.Column(db.Integer)
startdate = db.Column(db.String(150))
salary = db.Column(db.String(150))
@app.route('/employees/<int:page_num>')
def employees(page_num):
employees = Employees.query.paginate(per_page=2, page=page_num, error_out=True)
return render_template('index.html', employees=employees)
if __name__ == '__main__':
app.run(debug=True)
index.html 取自here
<html>
<head>
<title>Python Flask SQLAlchemy Pagination</title>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
</head>
<body>
<div class="container">
<div class="row">
<p><h2>Python Flask SQLAlchemy Pagination - Datatable bootstap</h2> </p>
<table id="example" class="table table-striped table-bordered" style="width:100%">
<thead>
<tr>
<th><input type="checkbox" onclick="checkAll(this)"></th>
<th>Name</th>
<th>Position</th>
<th>Office</th>
<th>Age</th>
<th>Start date</th>
<th>Salary</th>
</tr>
</thead>
<tbody>
{% for employee in employees.items %}
<tr>
<td><input type="checkbox" name=""></td>
<td>{{ employee.fullname}}</td>
<td>{{ employee.position}}</td>
<td>{{ employee.office}}</td>
<td>{{ employee.age}}</td>
<td>{{ employee.startdate}}</td>
<td>{{ employee.salary}}</td>
</tr>
{% endfor %}
</tbody>
<tfoot>
<tr>
<th></th>
<th>Name</th>
<th>Position</th>
<th>Office</th>
<th>Age</th>
<th>Start date</th>
<th>Salary</th>
</tr>
</tfoot>
</table>
</div>
<ul class="pagination">
{% if employees.has_prev %}
<li class="page-item"><a class="page-link" href="{{ url_for('employees', page_num=employees.prev_num) }}">Previous</a></li>
{% else %}
<li class="page-item disabled"><span class="page-link">Previous</span>
{% endif %}
</li>
{% for page in employees.iter_pages(left_edge=3, right_edge=3) %}
{% if page %}
<li class="page-item"><a class="page-link" href="{{ url_for('employees', page_num=page) }}">{{ page }}</a></li>
{% else %}
<li class="page-item disabled" id="example_ellipsis"><a href="#" class="page-link">…</a></li>
{% endif %}
{% endfor %}
{% if employees.has_next %}
<li class="page-item"><a class="page-link" href="{{ url_for('employees', page_num=employees.next_num) }}">Next</a></li>
{% else %}
<li class="page-item disabled"><span class="page-link">Next</span>
{% endif %}
</ul>
</div>
<style>
table{
width:100%;
}
#example_filter{
float:right;
}
#example_paginate{
float:right;
}
label {
display: inline-flex;
margin-bottom: .5rem;
margin-top: .5rem;
}
.page-item.disabled .page-link {
color: #6c757d;
pointer-events: none;
cursor: auto;
background-color: #fff;
border-color: #dee2e6;
}
</style>
<script>
function checkAll(bx) {
var cbs = document.getElementsByTagName('input');
for(var i=0; i < cbs.length; i++) {
if(cbs[i].type == 'checkbox') {
cbs[i].checked = bx.checked;
}
}
}
</script>
</body>
</html>
您能否建议如何在我的代码中实现类似的东西：
@app.route('/content_repository')
def content_repository():
# Check if user is loggedin
if 'loggedin' in session:
# User is loggedin show them the home page
cursor = connection.cursor(buffered=True)
cursor.execute("USE content_repository")
cursor.execute("""SELECT * FROM product""")
cursor = connection.cursor(buffered=True, dictionary=False)
cursor.execute("USE content_repository")
cursor.execute("""SELECT * FROM product""")
connection.commit()
data = cursor.fetchall()
return render_template('index.html', username=session['username'], data=data)
# User is not loggedin redirect to login page
return redirect(url_for('login'))
我的 index.html 文件
<div id="content">
<div class="container-fluid mx-auto pt-4">
<table class="table table-striped table-bordered" id="TableToExport" cellspacing="0">
<thead>
<tr>
<th style="width: 9%">Date</th>
<th style="width: 7%">Code</th>
<th style="width: 9%">Project Name</th>
<th style="width: 7%">Country</th>
<th style="width: 5%">Eretailer</th>
<th style="width: 7%">Brand</th>
<th style="width: 7%">Category</th>
<th style="width: 9%">Title</th>
<th style="width: 15%">Feature</th>
<th style="width: 20%">Description</th>
<th style="width: 3%">Version</th>
</tr>
</thead>
<tbody>
{% for item in data %}
<tr>
<td>{{item[0]}}</td>
<td>{{item[1]}}</td>
<td>{{item[2]}}</td>
<td>{{item[3]}}</td>
<td>{{item[4]}}</td>
<td>{{item[5]}}</td>
<td>{{item[6]}}</td>
<td>{{item[7]}}</td>
<td>{{item[8]}}</td>
<td>{{item[9]}}</td>
<td>{{item[10]}}</td>
</tr>
{% endfor %}
</table>
</div>
</div>
【问题讨论】：
标签： python mysql flask pagination