Tigers Part 1 - Paje and Lain

Procfile

@@ -0,0 +1 @@
+web: gunicorn 'app:create_app()'

app/__init__.py

@@ -1,7 +1,31 @@
 from flask import Flask
+from flask_sqlalchemy import SQLAlchemy
+from flask_migrate import Migrate
+
+from dotenv import load_dotenv
+import os
+
+db = SQLAlchemy()
+migrate = Migrate()
+load_dotenv()
 
 
 def create_app(test_config=None):
     app = Flask(__name__)
 
+    app.config["TESTING"] = True and test_config
+    app.config["SQLALCHEMY_TRACK_MODIFICATIONS"] = False
+    app.config["SQLALCHEMY_DATABASE_URI"] = \
+        os.environ.get("SQLALCHEMY_DATABASE_URI") if not test_config \
+        else os.environ.get("SQLALCHEMY_TEST_DATABASE_URI")
+
+    db.init_app(app)
+    migrate.init_app(app, db)
+
+    from app.models.planet import Planet
+
+    from .routes import planet_bp
+
+    app.register_blueprint(planet_bp)
+
     return app

app/models/planet.py

@@ -0,0 +1,16 @@
+from app import db
+
+
+class Planet(db.Model):
+    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
+    name = db.Column(db.String)
+    description = db.Column(db.String)
+    mass = db.Column(db.String)
+
+    def planet_dict(self):
+        return {
+            "id": self.id,
+            "name": self.name,
+            "description": self.description,
+            "mass": self.mass,
+        }

app/routes.py

@@ -1,2 +1,53 @@
+from app import db
+from app.models.planet import Planet
 from flask import Blueprint
+from flask import request, make_response, jsonify
+
+
+planet_bp = Blueprint("planet", __name__, url_prefix="/planets")
+
+
+@planet_bp.route("/", methods=["GET", "POST"])
+def handle_all_planets():
+    if request.method == "GET":
+        name_query = request.args.get("name")
+        if name_query:
+            planets_result = Planet.query.filter_by(name=name_query)
+        else:
+            planets_result = Planet.query.all()
+        return jsonify([p.planet_dict() for p in planets_result]), 200
+    elif request.method == "POST":
+        request_body = request.get_json()
+        new_planet = Planet(
+            name=request_body["name"],
+            description=request_body["description"],
+            mass=request_body["mass"],
+        )
+        db.session.add(new_planet)
+        db.session.commit()
+        return {"success": f"Planet {new_planet.name} is now in orbit"}, 201
+
+
+@planet_bp.route("/<planet_id>", methods=["GET", "PUT", "DELETE"])
+def handle_planet(planet_id):
+    if not planet_id.isnumeric():
+        return {"error": f"Planet #{planet_id} Invalid id"}, 400
+
+    planet = Planet.query.get(planet_id)
+    if not planet:
+        return {"error": f"Planet #{planet_id} No planet found"}, 404
+
+    elif request.method == "GET":
+        return planet.planet_dict()
+    elif request.method == "PUT":
+        form_data = request.get_json()
+        planet.name = form_data["name"]
+        planet.description = form_data["description"]
+        planet.mass = form_data["mass"]
+        db.session.commit()
+        return {"success": f"Planet #{planet_id} successfully updated"}, 200
+    elif request.method == "DELETE":
+        db.session.delete(planet)
+        db.session.commit()
+        return {"success": f"Planet #{planet_id} successfully deleted"}, 200
 

app/tests/conftest.py

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+import pytest
+from app import create_app, db
+from app.models.planet import Planet
+from flask.signals import request_finished
+
+
+@pytest.fixture
+def app():
+    app = create_app({"TESTING": True})
+
+    @request_finished.connect_via(app)
+    def expire_session(sender, response, **extra):
+        db.session.remove()
+
+    with app.app_context():
+        db.create_all()
+        yield app
+
+    with app.app_context():
+        db.drop_all()
+
+
+@pytest.fixture
+def client(app):
+    return app.test_client()
+
+
+@pytest.fixture
+def two_saved_planets(app):
+    # Arrange
+    venus_planet = Planet(name="Venus", description="Hot mama", mass="The bigger the better.")
+    earth_planet = Planet(name="Earth", description="There are bugs here", mass="normal")
+
+    db.session.add_all([venus_planet, earth_planet])
+    db.session.commit()

app/tests/test_routes.py

@@ -0,0 +1,88 @@
+def test_get_all_planets_with_no_records(client):
+    response = client.get("/planets/")
+    response_body = response.get_json()
+    assert response.status_code == 200
+    assert response_body == []
+
+
+def test_get_all_planets(client, two_saved_planets):
+    response = client.get("/planets/")
+    response_body = response.get_json()
+    assert response.status_code == 200
+    assert response_body == [
+        {
+            "id": 1,
+            "name": "Venus",
+            "description": "Hot mama",
+            "mass": "The bigger the better.",
+        },
+        {
+            "id": 2,
+            "name": "Earth",
+            "description": "There are bugs here",
+            "mass": "normal",
+        },
+    ]
+
+
+def test_get_one_planet(client, two_saved_planets):
+    response = client.get("/planets/1")
+    response_body = response.get_json()
+    assert response.status_code == 200
+    assert response_body == {
+        "id": 1,
+        "name": "Venus",
+        "description": "Hot mama",
+        "mass": "The bigger the better.",
+    }
+
+
+def test_get_one_planet_no_data_returns_404(client):
+    response = client.get("/planets/3")
+    assert response.status_code == 404
+
+
+def test_post_planet_returns_201(client):
+    response = client.post("/planets/", json={
+        "name": "Earth II",
+        "description": "If Earth is so good why isn't there... oh",
+        "mass": "Better than normal"
+    })
+    response_body = response.get_json()
+    assert response.status_code == 201
+    assert response_body == {"success": "Planet Earth II is now in orbit"}
+
+
+def test_invalid_planet_id_returns_400(client):
+    response = client.get("/planets/invalid")
+    assert response.status_code == 400
+
+
+def test_delete_planet(client, two_saved_planets):
+    response = client.delete("/planets/1")
+    response_body = response.get_json()
+    assert response.status_code == 200
+    assert response_body == {"success": "Planet #1 successfully deleted"}
+
+
+def test_update_planet(client, two_saved_planets):
+    response = client.put("/planets/1", json={
+        "name": "Mercury",
+        "description": "Actually, Planet 1 is totally mercury. What are you doing here Venus",
+        "mass": "Correct"
+    })
+    response_body = response.get_json()
+    assert response.status_code == 200
+    assert response_body == {"success": "Planet #1 successfully updated"}
+
+
+def test_name_query(client, two_saved_planets):
+    response = client.get("/planets/?name=Venus")
+    response_body = response.get_json()
+    assert response.status_code == 200
+    assert response_body == [{
+        "id": 1,
+        "name": "Venus",
+        "description": "Hot mama",
+        "mass": "The bigger the better.",
+    }]

migrations/README

@@ -0,0 +1 @@
+Generic single-database configuration.

migrations/alembic.ini

@@ -0,0 +1,45 @@
+# A generic, single database configuration.
+
+[alembic]
+# template used to generate migration files
+# file_template = %%(rev)s_%%(slug)s
+
+# set to 'true' to run the environment during
+# the 'revision' command, regardless of autogenerate
+# revision_environment = false
+
+
+# Logging configuration
+[loggers]
+keys = root,sqlalchemy,alembic
+
+[handlers]
+keys = console
+
+[formatters]
+keys = generic
+
+[logger_root]
+level = WARN
+handlers = console
+qualname =
+
+[logger_sqlalchemy]
+level = WARN
+handlers =
+qualname = sqlalchemy.engine
+
+[logger_alembic]
+level = INFO
+handlers =
+qualname = alembic
+
+[handler_console]
+class = StreamHandler
+args = (sys.stderr,)
+level = NOTSET
+formatter = generic
+
+[formatter_generic]
+format = %(levelname)-5.5s [%(name)s] %(message)s
+datefmt = %H:%M:%S

migrations/env.py

@@ -0,0 +1,96 @@
+from __future__ import with_statement
+
+import logging
+from logging.config import fileConfig
+
+from sqlalchemy import engine_from_config
+from sqlalchemy import pool
+from flask import current_app
+
+from alembic import context
+
+# this is the Alembic Config object, which provides
+# access to the values within the .ini file in use.
+config = context.config
+
+# Interpret the config file for Python logging.
+# This line sets up loggers basically.
+fileConfig(config.config_file_name)
+logger = logging.getLogger('alembic.env')
+
+# add your model's MetaData object here
+# for 'autogenerate' support
+# from myapp import mymodel
+# target_metadata = mymodel.Base.metadata
+config.set_main_option(
+    'sqlalchemy.url',
+    str(current_app.extensions['migrate'].db.engine.url).replace('%', '%%'))
+target_metadata = current_app.extensions['migrate'].db.metadata
+
+# other values from the config, defined by the needs of env.py,
+# can be acquired:
+# my_important_option = config.get_main_option("my_important_option")
+# ... etc.
+
+
+def run_migrations_offline():
+    """Run migrations in 'offline' mode.
+
+    This configures the context with just a URL
+    and not an Engine, though an Engine is acceptable
+    here as well.  By skipping the Engine creation
+    we don't even need a DBAPI to be available.
+
+    Calls to context.execute() here emit the given string to the
+    script output.
+
+    """
+    url = config.get_main_option("sqlalchemy.url")
+    context.configure(
+        url=url, target_metadata=target_metadata, literal_binds=True
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online():
+    """Run migrations in 'online' mode.
+
+    In this scenario we need to create an Engine
+    and associate a connection with the context.
+
+    """
+
+    # this callback is used to prevent an auto-migration from being generated
+    # when there are no changes to the schema
+    # reference: http://alembic.zzzcomputing.com/en/latest/cookbook.html
+    def process_revision_directives(context, revision, directives):
+        if getattr(config.cmd_opts, 'autogenerate', False):
+            script = directives[0]
+            if script.upgrade_ops.is_empty():
+                directives[:] = []
+                logger.info('No changes in schema detected.')
+
+    connectable = engine_from_config(
+        config.get_section(config.config_ini_section),
+        prefix='sqlalchemy.',
+        poolclass=pool.NullPool,
+    )
+
+    with connectable.connect() as connection:
+        context.configure(
+            connection=connection,
+            target_metadata=target_metadata,
+            process_revision_directives=process_revision_directives,
+            **current_app.extensions['migrate'].configure_args
+        )
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()