muassif
57 lines
1.6 KiB
Python
57 lines
1.6 KiB
Python
#app5.py: interacting with db for create, delete and list objects
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from flask import Flask, request, render_template, redirect
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from flask_sqlalchemy import SQLAlchemy
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from werkzeug.exceptions import HTTPException
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import json
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app = Flask(__name__)
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app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///student.db'
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app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
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db = SQLAlchemy(app)
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class Student(db.Model):
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id = db.Column(db.Integer, primary_key=True)
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name = db.Column(db.String(80), nullable=False)
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grade = db.Column(db.String(20), nullable=True)
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def __repr__(self):
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return '<Student %r>' % self.name
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@app.get('/list')
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def list_students():
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student_list = Student.query.all()
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return render_template('app5.html', students=student_list)
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@app.get('/add')
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def add_student():
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fname = request.args['fname']
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lname = request.args.get('lname', '')
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grade = request.args.get('grade','')
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student = Student(name=f"{fname} {lname}", grade=grade)
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db.session.add(student)
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db.session.commit()
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return redirect("/list")
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@app.get('/delete/<int:id>')
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def del_student(id):
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todelete = Student.query.filter_by(id=id).first()
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db.session.delete(todelete)
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db.session.commit()
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return redirect("/list")
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@app.errorhandler(HTTPException)
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def page_not_found(error):
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print(error)
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response = error.get_response()
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# replace the body with JSON
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response.data = json.dumps({
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"code": error.code,
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"name": error.name,
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"description": error.description,
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})
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return response
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if __name__ == '__main__':
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app.run()
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