Uploading chapter 11 code examples
This commit is contained in:
muassif
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"""
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ASGI config for grades project.
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It exposes the ASGI callable as a module-level variable named ``application``.
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For more information on this file, see
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https://docs.djangoproject.com/en/3.2/howto/deployment/asgi/
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"""
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import os
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from django.core.asgi import get_asgi_application
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os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'grades.settings')
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application = get_asgi_application()
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# Use the official lightweight Python image.
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# https://hub.docker.com/_/python
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FROM python:3.8-slim
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# Allow statements and log messages to immediately appear in the Knative logs
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ENV PYTHONUNBUFFERED True
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# Copy local code to the container image.
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WORKDIR /app
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COPY . ./
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# Install production dependencies.
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RUN pip install -r requirements.txt
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RUN pip install Flask gunicorn
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# Run the web service on container startup. Here we use the gunicorn
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# webserver, with one worker process and 8 threads.
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# For environments with multiple CPU cores, increase the number of workers
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# to be equal to the cores available.
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# Timeout is set to 0 to disable the timeouts of the workers to allow Cloud Run to handle instance scaling.
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CMD exec gunicorn --bind :$PORT --workers 1 --threads 8 --timeout 0 api_app:app
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# api_app: REST API for student resource
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from flask_sqlalchemy import SQLAlchemy
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from flask import Flask
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from flask_restful import Resource, Api, reqparse
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app = Flask(__name__)
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api = Api(app)
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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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parser = reqparse.RequestParser()
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parser.add_argument('name', type=str)
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parser.add_argument('grade', type=str)
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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 f"{'id':{self.id}, 'name':{self.name},'grade':{self.grade}}"
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def serialize(self):
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return {
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'id': self.id,
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'name': self.name,
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'grade': self.grade
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}
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class StudentDao(Resource):
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def get(self, student_id):
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student = Student.query.filter_by(id=student_id).\
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first_or_404(
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description='Record with id={} is not available'.format(student_id))
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return student.serialize()
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def delete(self, student_id):
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student = Student.query.filter_by(id=student_id).\
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first_or_404(
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description='Record with id={} is not available'.format(student_id))
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db.session.delete(student)
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db.session.commit()
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return '', 204
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def put(self, student_id):
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student = Student.query.filter_by(id=student_id).first_or_404(
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description='Record with id={} is not available'.format(student_id))
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args = parser.parse_args()
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name = args['name']
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grade = args['grade']
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if (name):
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student.name = name
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if (grade):
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student.grade = grade
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db.session.commit()
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return student.serialize(), 200
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class StudentListDao(Resource):
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def get(self):
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students = Student.query.all()
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return [Student.serialize(student) for student in students]
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def post(self):
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args = parser.parse_args()
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name = args['name']
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grade = args['grade']
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student = Student(name=name, grade=grade)
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db.session.add(student)
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db.session.commit()
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return student.serialize(), 200
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api.add_resource(StudentDao, '/students/<student_id>')
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api.add_resource(StudentListDao, '/students')
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if __name__ == '__main__':
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# app.run(debug=True)
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app.run(debug=True, host="0.0.0.0", port=int(os.environ.get("PORT", 8080)))
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aniso8601==9.0.1
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attrs==21.2.0
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certifi==2021.5.30
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chardet==4.0.0
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click==8.0.1
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Flask==2.0.1
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Flask-RESTful==0.3.9
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flask-restplus==0.13.0
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Flask-SQLAlchemy==2.5.1
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greenlet==1.1.0
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idna==2.10
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itsdangerous==2.0.1
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Jinja2==3.0.1
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jsonschema==3.2.0
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MarkupSafe==2.0.1
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pyrsistent==0.17.3
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pytz==2021.1
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requests==2.25.1
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six==1.16.0
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SQLAlchemy==1.4.19
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urllib3==1.26.6
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utils-flask-sqlalchemy==0.1.4
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Werkzeug==2.0.1
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Binary file not shown.
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<!doctype html>
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<html lang="en">
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<head>
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<!-- Required meta tags -->
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<!-- Bootstrap CSS -->
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<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta2/dist/css/bootstrap.min.css" rel="stylesheet"
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integrity="sha384-BmbxuPwQa2lc/FVzBcNJ7UAyJxM6wuqIj61tLrc4wSX0szH/Ev+nYRRuWlolflfl" crossorigin="anonymous">
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<link rel="stylesheet" href="{{ url_for('static', filename='css/style.css') }}">
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<script src="{{ url_for('static', filename='js/test.js') }}"></script>
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<title> {% block title %} {% endblock title %} - Students</title>
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</head>
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<body>
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<nav class="navbar navbar-expand-lg navbar-light bg-light">
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<div class="container-fluid">
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<a class="navbar-brand" href="/">Students</a>
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<button class="navbar-toggler" type="button" data-bs-toggle="collapse"
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data-bs-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false"
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aria-label="Toggle navigation">
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<span class="navbar-toggler-icon"></span>
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</button>
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<div class="collapse navbar-collapse" id="navbarSupportedContent">
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<ul class="navbar-nav me-auto mb-2 mb-lg-0">
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<li class="nav-item">
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<a class="nav-link active" aria-current="page" href="#">Home</a>
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</li>
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<li class="nav-item">
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<a class="nav-link" href="#">About</a>
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</li>
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</ul>
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</div>
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</div>
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</nav>
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{% block body %}
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{% endblock body %}
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</body>
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</html>
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{% extends 'base.html' %}
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{% block title %} Home{% endblock title %}
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{% block body %}
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<div class="container my-3">
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<h2>Add a Student</h2>
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<form action="/" method="POST">
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<div class="mb-2">
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<label for="fname" class="form-label">First name</label>
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<input type="text" class="form-control" name="fname" id="fname" aria-describedby="emailHelp">
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</div>
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<div class="mb-2">
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<label for="lname" class="form-label">Last Name</label>
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<input type="text" class="form-control" name="lname" id="lname" aria-describedby="emailHelp">
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</div>
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<div class="mb-2">
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<label for="grade" class="form-label">Grade</label>
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<input type="text" class="form-control" name="grade" id="grade">
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</div>
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<button type="submit" class="btn btn-dark">Submit</button>
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</form>
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</div>
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<div class="container my-3">
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<h2>Students</h2>
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{% if students|length == 0 %}
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<div class="alert alert-dark" role="alert">
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No student found. Add your first student now!
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</div>
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{% else %}
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<table class="table">
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<thead>
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<tr>
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<th scope="col">No</th>
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<th scope="col">Name</th>
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<th scope="col">Grade</th>
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<th scope="col">Building</th>
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<th scope="col">Teacher</th>
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<th scope="col">Actions</th>
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</tr>
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</thead>
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<tbody>
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{% for student in students %}
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<tr>
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<th scope="row">{{loop.index}}</th>
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<td>{{student.name}}</td>
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<td>{{student.grade}}</td>
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<td>{{student.building}}</td>
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<td>{{student.teacher}}</td>
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<td>
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<a href="/update/{{student.id}}" type="button" class="btn btn-outline-dark btn-sm mx-1">Update</button>
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<a href="/delete/{{student.id}}" type="button" class="btn btn-outline-dark btn-sm mx-1">Delete</button>
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</td>
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</tr>
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{% endfor %}
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</tbody>
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</table>
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{% endif %}
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</div>
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<!-- Optional JavaScript; choose one of the two! -->
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<!-- Option 1: Bootstrap Bundle with Popper -->
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<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta2/dist/js/bootstrap.bundle.min.js"
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integrity="sha384-b5kHyXgcpbZJO/tY9Ul7kGkf1S0CWuKcCD38l8YkeH8z8QjE0GmW1gYU5S9FOnJ0"
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crossorigin="anonymous"></script>
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<!-- Option 2: Separate Popper and Bootstrap JS -->
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<!--
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<script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.6.0/dist/umd/popper.min.js" integrity="sha384-KsvD1yqQ1/1+IA7gi3P0tyJcT3vR+NdBTt13hSJ2lnve8agRGXTTyNaBYmCR/Nwi" crossorigin="anonymous"></script>
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<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta2/dist/js/bootstrap.min.js" integrity="sha384-nsg8ua9HAw1y0W1btsyWgBklPnCUAFLuTMS2G72MMONqmOymq585AcH49TLBQObG" crossorigin="anonymous"></script>
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-->
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{% endblock body %}
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{% extends 'base.html' %}
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{% block title %} Home{% endblock title %}
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{% block body %}
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<div class="container my-3">
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<h2>Update Student</h2>
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<form action="/update/{{student.id}}" method="POST">
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<div class="mb-3">
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<label for="fname" class="form-label">First name</label>
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<input type="text" class="form-control" name="fname" id="fname" value="{{fname}}" aria-describedby="emailHelp">
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</div>
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<div class="mb-3">
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<label for="lname" class="form-label">Last Name</label>
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<input type="text" class="form-control" name="lname" id="lname" value="{{lname}}" aria-describedby="emailHelp">
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</div>
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<div class="mb-3">
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<label for="grade" class="form-label">Grade</label>
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<input type="text" class="form-control" name="grade" id="grade" value="{{student.grade}}" >
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</div>
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<button type="submit" class="btn btn-dark">Update</button>
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</form>
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</div>
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<!-- Optional JavaScript; choose one of the two! -->
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<!-- Option 1: Bootstrap Bundle with Popper -->
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<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta2/dist/js/bootstrap.bundle.min.js"
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integrity="sha384-b5kHyXgcpbZJO/tY9Ul7kGkf1S0CWuKcCD38l8YkeH8z8QjE0GmW1gYU5S9FOnJ0"
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crossorigin="anonymous"></script>
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<!-- Option 2: Separate Popper and Bootstrap JS -->
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<!--
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<script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.6.0/dist/umd/popper.min.js" integrity="sha384-KsvD1yqQ1/1+IA7gi3P0tyJcT3vR+NdBTt13hSJ2lnve8agRGXTTyNaBYmCR/Nwi" crossorigin="anonymous"></script>
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<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta2/dist/js/bootstrap.min.js" integrity="sha384-nsg8ua9HAw1y0W1btsyWgBklPnCUAFLuTMS2G72MMONqmOymq585AcH49TLBQObG" crossorigin="anonymous"></script>
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-->
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{% endblock body %}
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#webapp.py: interacting with business latyer via REST API
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# for create, delete and list objects
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from flask import Flask, render_template, redirect, request
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import requests, json
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app = Flask(__name__)
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#STUDENTS_MS = "http://localhost:8080/students"
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STUDENTS_MS = "https://students2-wwzgfqvyaa-de.a.run.app/students"
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GRADES_MS = "http://localhost:8000/grades"
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@app.get('/')
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def list():
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student_svc_resp = requests.get(STUDENTS_MS)
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students = json.loads(student_svc_resp.text)
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grades_svc_resp = requests.get(GRADES_MS)
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grades_list = json.loads(grades_svc_resp.text)
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grades_dict = {grade_item['grade_id']:
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grade_item for grade_item in grades_list}
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for student in students:
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student['building'] = grades_dict[student['grade']]['building']
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student['teacher'] = grades_dict[student['grade']]['teacher']
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return render_template('main.html', students=students)
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@app.post('/')
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def add():
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fname = request.form['fname']
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lname = request.form['lname']
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grade = request.form['grade']
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payload = {'name': f"{fname} {lname}", 'grade': grade}
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respone = requests.post(STUDENTS_MS, data=payload)
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return redirect("/")
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@app.get('/delete/<int:id>')
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def delete(id):
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response = requests.delete(STUDENTS_MS+'/'+str(id))
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return redirect("/")
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@app.post('/update/<int:id>')
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def update(id):
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fname = request.form['fname']
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lname = request.form['lname']
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grade = request.form['grade']
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payload = {'name' : f"{fname} {lname}", 'grade':grade}
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respone = requests.put(STUDENTS_MS+'/' + str(id), data = payload)
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return redirect("/")
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@app.get('/update/<int:id>')
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def load_student_for_update(id):
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response = requests.get(STUDENTS_MS+'/'+str(id))
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student = json.loads(response.text)
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fname = student['name'].split()[0]
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lname = student['name'].split()[1]
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return render_template('update.html', fname=fname, lname=lname, student= student)
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if __name__ == '__main__':
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app.run(debug=True, host='0.0.0.0', port=80)
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