Addding code of lecture5

Author: vdhug

lecture4/airline1/application.py

@@ -0,0 +1,58 @@
+import os
+
+from flask import Flask, render_template, request
+from sqlalchemy import create_engine
+from sqlalchemy.orm import scoped_session, sessionmaker
+
+app = Flask(__name__)
+
+engine = create_engine(os.getenv("DATABASE_URL"))
+db = scoped_session(sessionmaker(bind=engine))
+
+
+@app.route("/")
+def index():
+    flights = db.execute("SELECT * FROM flights").fetchall()
+    return render_template("index.html", flights=flights)
+
+
+@app.route("/book", methods=["POST"])
+def book():
+    """Book a flight."""
+
+    # Get form information.
+    name = request.form.get("name")
+    try:
+        flight_id = int(request.form.get("flight_id"))
+    except ValueError:
+        return render_template("error.html", message="Invalid flight number.")
+
+    # Make sure flight exists.
+    if db.execute("SELECT * FROM flights WHERE id = :id", {"id": flight_id}).rowcount == 0:
+        return render_template("error.html", message="No such flight with that id.")
+    db.execute("INSERT INTO passengers (name, flight_id) VALUES (:name, :flight_id)",
+            {"name": name, "flight_id": flight_id})
+    db.commit()
+    return render_template("success.html")
+
+
+@app.route("/flights")
+def flights():
+    """List all flights."""
+    flights = db.execute("SELECT * FROM flights").fetchall()
+    return render_template("flights.html", flights=flights)
+
+
+@app.route("/flights/<int:flight_id>")
+def flight(flight_id):
+    """List details about a single flight."""
+
+    # Make sure flight exists.
+    flight = db.execute("SELECT * FROM flights WHERE id = :id", {"id": flight_id}).fetchone()
+    if flight is None:
+        return render_template("error.html", message="No such flight.")
+
+    # Get all passengers.
+    passengers = db.execute("SELECT name FROM passengers WHERE flight_id = :flight_id",
+                            {"flight_id": flight_id}).fetchall()
+    return render_template("flight.html", flight=flight, passengers=passengers)

lecture4/airline1/templates/error.html

@@ -0,0 +1,10 @@
+{% extends "layout.html" %}
+
+{% block title %}
+    Error
+{% endblock %}
+
+{% block body %}
+    <h1>Error</h1>
+    {{ message }}
+{% endblock %}

lecture4/airline1/templates/flight.html

@@ -0,0 +1,25 @@
+{% extends "layout.html" %}
+
+{% block title %}
+    Flight
+{% endblock %}
+
+{% block body %}
+    <h1>Flight Details</h1>
+
+    <ul>
+        <li>Origin: {{ flight.origin }}</li>
+        <li>Destination: {{ flight.destination }}</li>
+        <li>Duration: {{ flight.duration}} minutes</li>
+    </ul>
+
+    <h2>Passengers</h2>
+    <ul>
+        {% for passenger in passengers %}
+            <li>{{ passenger.name }}</li>
+        {% else %}
+            <li>No passengers.</li>
+        {% endfor %}
+    </ul>
+
+{% endblock %}

lecture4/airline1/templates/flights.html

@@ -0,0 +1,20 @@
+{% extends "layout.html" %}
+
+{% block title %}
+    Flights
+{% endblock %}
+
+{% block body %}
+    <h1>All Flights</h1>
+
+    <ul>
+        {% for flight in flights %}
+            <li>
+                <a href="{{ url_for('flight', flight_id=flight.id) }}">
+                    {{ flight.origin }} to {{ flight.destination }}
+                </a>
+            </li>
+        {% endfor %}
+    </ul>
+
+{% endblock %}

lecture4/airline1/templates/index.html

@@ -0,0 +1,29 @@
+{% extends "layout.html" %}
+
+{% block title %}
+    Flights
+{% endblock %}
+
+{% block body %}
+    <h1>Book a Flight</h1>
+
+    <form action="{{ url_for('book') }}" method="post">
+
+        <div class="form-group">
+            <select class="form-control" name="flight_id">
+                {% for flight in flights %}
+                    <option value="{{ flight.id }}">{{ flight.origin }} to {{ flight.destination }}</option>
+                {% endfor %}
+            </select>
+        </div>
+
+        <div class="form-group">
+            <input class="form-control" name="name" placeholder="Passenger Name">
+        </div>
+
+        <div class="form-group">
+            <button class="btn btn-primary">Book Flight</button>
+        </div>
+
+    </form>
+{% endblock %}

lecture4/airline1/templates/layout.html

@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>{% block title %}{% endblock %}</title>
+        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Zug+QiDoJOrZ5t4lssLdxGhVrurbmBWopoEl+M6BdEfwnCJZtKxi1KgxUyJq13dy" crossorigin="anonymous">
+    </head>
+    <body>
+        <div class="container">
+            {% block body %}
+            {% endblock %}
+        </div>
+    </body>
+</html>

lecture4/airline1/templates/success.html

@@ -0,0 +1,11 @@
+{% extends "layout.html" %}
+
+{% block title %}
+    Success!
+{% endblock %}
+
+{% block body %}
+    <h1>Success!</h1>
+
+    You have successfully booked your flight.
+{% endblock %}

lecture4/airline2/__pycache__/application.cpython-37.pyc

@@ -0,0 +1,57 @@
+from flask import Flask, render_template, request
+from models import *
+
+app = Flask(__name__)
+app.config["SQLALCHEMY_DATABASE_URI"] = os.getenv("DATABASE_URL")
+app.config["SQLALCHEMY_TRACK_MODIFICATIONS"] = False
+db.init_app(app)
+
+
+@app.route("/")
+def index():
+    flights = Flight.query.all()
+    return render_template("index.html", flights=flights)
+
+
+@app.route("/book", methods=["POST"])
+def book():
+    """Book a flight."""
+
+    # Get form information.
+    name = request.form.get("name")
+    try:
+        flight_id = int(request.form.get("flight_id"))
+    except ValueError:
+        return render_template("error.html", message="Invalid flight number.")
+
+    # Make sure the flight exists.
+    flight = Flight.query.get(flight_id)
+    if flight is None:
+        return render_template("error.html", message="No such flight with that id.")
+
+    # Add passenger.
+    passenger = Passenger(name=name, flight_id=flight_id)
+    db.session.add(passenger)
+    db.session.commit()
+    return render_template("success.html")
+
+
+@app.route("/flights")
+def flights():
+    """List all flights."""
+    flights = Flight.query.all()
+    return render_template("flights.html", flights=flights)
+
+
+@app.route("/flights/<int:flight_id>")
+def flight(flight_id):
+    """List details about a single flight."""
+
+    # Make sure flight exists.
+    flight = Flight.query.get(flight_id)
+    if flight is None:
+        return render_template("error.html", message="No such flight.")
+
+    # Get all passengers.
+    passengers = Passenger.query.filter_by(flight_id=flight_id).all()
+    return render_template("flight.html", flight=flight, passengers=passengers)

lecture4/airline2/__pycache__/models.cpython-37.pyc

@@ -0,0 +1,21 @@
+import os
+
+from flask import Flask
+from flask_sqlalchemy import SQLAlchemy
+
+db = SQLAlchemy()
+
+
+class Flight(db.Model):
+    __tablename__ = "flights"
+    id = db.Column(db.Integer, primary_key=True)
+    origin = db.Column(db.String, nullable=False)
+    destination = db.Column(db.String, nullable=False)
+    duration = db.Column(db.Integer, nullable=False)
+
+
+class Passenger(db.Model):
+    __tablename__ = "passengers"
+    id = db.Column(db.Integer, primary_key=True)
+    name = db.Column(db.String, nullable=False)
+    flight_id = db.Column(db.Integer, db.ForeignKey("flights.id"), nullable=False)

lecture4/airline2/application.py

@@ -0,0 +1,10 @@
+{% extends "layout.html" %}
+
+{% block title %}
+    Error
+{% endblock %}
+
+{% block body %}
+    <h1>Error</h1>
+    {{ message }}
+{% endblock %}

lecture4/airline2/models.py

@@ -0,0 +1,25 @@
+{% extends "layout.html" %}
+
+{% block title %}
+    Flight
+{% endblock %}
+
+{% block body %}
+    <h1>Flight Details</h1>
+
+    <ul>
+        <li>Origin: {{ flight.origin }}</li>
+        <li>Destination: {{ flight.destination }}</li>
+        <li>Duration: {{ flight.duration}} minutes</li>
+    </ul>
+
+    <h2>Passengers</h2>
+    <ul>
+        {% for passenger in passengers %}
+            <li>{{ passenger.name }}</li>
+        {% else %}
+            <li>No passengers.</li>
+        {% endfor %}
+    </ul>
+
+{% endblock %}

lecture4/airline2/templates/error.html

@@ -0,0 +1,20 @@
+{% extends "layout.html" %}
+
+{% block title %}
+    Flights
+{% endblock %}
+
+{% block body %}
+    <h1>All Flights</h1>
+
+    <ul>
+        {% for flight in flights %}
+            <li>
+                <a href="{{ url_for('flight', flight_id=flight.id) }}">
+                    {{ flight.origin }} to {{ flight.destination }}
+                </a>
+            </li>
+        {% endfor %}
+    </ul>
+
+{% endblock %}

lecture4/airline2/templates/flight.html

@@ -0,0 +1,29 @@
+{% extends "layout.html" %}
+
+{% block title %}
+    Flights
+{% endblock %}
+
+{% block body %}
+    <h1>Book a Flight</h1>
+
+    <form action="{{ url_for('book') }}" method="post">
+
+        <div class="form-group">
+            <select class="form-control" name="flight_id">
+                {% for flight in flights %}
+                    <option value="{{ flight.id }}">{{ flight.origin }} to {{ flight.destination }}</option>
+                {% endfor %}
+            </select>
+        </div>
+
+        <div class="form-group">
+            <input class="form-control" name="name" placeholder="Passenger Name">
+        </div>
+
+        <div class="form-group">
+            <button class="btn btn-primary">Book Flight</button>
+        </div>
+
+    </form>
+{% endblock %}

lecture4/airline2/templates/flights.html

@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>{% block title %}{% endblock %}</title>
+        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Zug+QiDoJOrZ5t4lssLdxGhVrurbmBWopoEl+M6BdEfwnCJZtKxi1KgxUyJq13dy" crossorigin="anonymous">
+    </head>
+    <body>
+        <div class="container">
+            {% block body %}
+            {% endblock %}
+        </div>
+    </body>
+</html>

lecture4/airline2/templates/index.html

@@ -0,0 +1,11 @@
+{% extends "layout.html" %}
+
+{% block title %}
+    Success!
+{% endblock %}
+
+{% block body %}
+    <h1>Success!</h1>
+
+    You have successfully booked your flight.
+{% endblock %}