界面显示：
app.py
from flask import Flask, request, flash, url_for, redirect, render_template
from flask_sqlalchemy import SQLAlchemy
app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///students.sqlite3'
app.config['SECRET_KEY'] = "random string"
db = SQLAlchemy(app)
class students(db.Model):
id = db.Column('student_id', db.Integer, primary_key = True)
name = db.Column(db.String(100))
city = db.Column(db.String(50))
addr = db.Column(db.String(200))
pin = db.Column(db.String(10))
def __init__(self, name, city, addr,pin):
self.name = name
self.city = city
self.addr = addr
self.pin = pin
@app.route('/')
def show_all():
return render_template('show_all.html', students = students.query.all() )
@app.route('/new', methods = ['GET', 'POST'])
def new():
if request.method == 'POST':
if not request.form['name'] or not request.form['city'] or not request.form['addr']:
flash('Please enter all the fields', 'error')
else:
student = students(request.form['name'], request.form['city'],
request.form['addr'], request.form['pin'])
db.session.add(student)
db.session.commit()
flash('Record was successfully added')
return redirect(url_for('show_all'))
return render_template('new.html')
if __name__ == '__main__':
db.create_all()
app.run(debug = True)show_all.html
<!DOCTYPE html>
<html lang = "en">
<head></head>
<body>
<h3>
<a href = "{{ url_for('show_all') }}">Comments - Flask
SQLAlchemy example</a>
</h3>
<hr/>
{%- for message in get_flashed_messages() %}
{{ message }}
{%- endfor %}
<h3>Students (<a href = "{{ url_for('new') }}">Add Student
</a>)</h3>
<table>
<thead>
<tr>
<th>Name</th>
<th>City</th>
<th>Address</th>
<th>Pin</th>
</tr>
</thead>
<tbody>
{% for student in students %}
<tr>
<td>{{ student.name }}</td>
<td>{{ student.city }}</td>
<td>{{ student.addr }}</td>
<td>{{ student.pin }}</td>
</tr>
{% endfor %}
</tbody>
</table>
</body>
</html>new.html
<!DOCTYPE html>
<html>
<body>
<h3>Students - Flask SQLAlchemy example</h3>
<hr/>
{%- for category, message in get_flashed_messages(with_categories = true) %}
<div class = "alert alert-danger">
{{ message }}
</div>
{%- endfor %}
<form action = "{{ request.path }}" method = "post">
<label for = "name">Name</label><br>
<input type = "text" name = "name" placeholder = "Name" /><br>
<label for = "email">City</label><br>
<input type = "text" name = "city" placeholder = "city" /><br>
<label for = "addr">addr</label><br>
<textarea name = "addr" placeholder = "addr"></textarea><br>
<label for = "PIN">City</label><br>
<input type = "text" name = "pin" placeholder = "pin" /><br>
<input type = "submit" value = "Submit" />
</form>
</body>
</html>