Sphinx-Denise and Olga

app/__init__.py

@@ -1,7 +1,23 @@
 from flask import Flask
+from .db import db, migrate
+from .models import planet
+from .routes.planet_routes import planets_bp
+import os
 
 
-def create_app(test_config=None):
+def create_app(config=None):
     app = Flask(__name__)
 
-    return app
+    app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
+    app.config['SQLALCHEMY_DATABASE_URI'] = os.environ.get('SQLALCHEMY_DATABASE_URI')
+
+    if config:
+        app.config.update(config)
+
+    db.init_app(app)
+    migrate.init_app(app, db)
+
+    # Register Blueprints here
+    app.register_blueprint(planets_bp)
+
+    return app

app/db.py

@@ -0,0 +1,6 @@
+from flask_sqlalchemy import SQLAlchemy
+from flask_migrate import Migrate
+from .models.base import Base
+
+db = SQLAlchemy(model_class=Base)
+migrate = Migrate()

app/models/base.py

@@ -0,0 +1,4 @@
+from sqlalchemy.orm import DeclarativeBase
+
+class Base(DeclarativeBase):
+    pass

app/models/planet.py

@@ -0,0 +1,26 @@
+from sqlalchemy.orm import Mapped, mapped_column
+from ..db import db
+
+class Planet(db.Model):
+    id: Mapped[int] = mapped_column(primary_key=True, autoincrement=True)
+    name: Mapped[str]
+    description: Mapped[str]
+    diameter: Mapped[int]
+
+# class Planet:
+#     def __init__(self, id, name, description):
+#         self.id = id
+#         self.name = name
+#         self.description = description
+
+#     planets = [
+#         Planet(1, "Mercury", "Hottest planet", 4879),
+#         Planet(2, "Venus", "Second planet from the sun", 12104),
+#         Planet(3, "Earth", "Our home planet", 12742),
+#         Planet(4, "Mars", "The red planet", 6779),
+#         Planet(5, "Jupiter", "Largest planet in the solar system", 139820),
+#         Planet(6, "Saturn", "Has beautiful rings", 116460),
+#         Planet(7, "Uranus", "Rotates on its side", 50724),
+#         Planet(8, "Neptune", "Giant and icy planet", 49244),
+#         Planet(9, "Pluto", "The planet they declassified as a planet", 2377)
+#     ]

app/routes/planet_routes.py

@@ -0,0 +1,113 @@
+from flask import Blueprint, abort, make_response, Response, request
+from app.models.planet import Planet
+from sqlalchemy import desc
+from ..db import db
+
+
+planets_bp = Blueprint("planets_bp", __name__, url_prefix="/planets")
+
+
+@planets_bp.get("")
+def get_all_planets():
+    query = db.select(Planet)
+
+    name_query = request.args.get("name")
+    if name_query:
+        query = query.where(Planet.name.ilike(f"%{name_query}%"))
+
+    description_query = request.args.get("description")
+    if description_query:
+        query = query.where(Planet.description.ilike(f"%{description_query}%"))
+
+    diameter_query = request.args.get("diameter")
+    if diameter_query:
+        query = query.where(Planet.diameter.ilike(f"%{diameter_query}%"))
+
+    query = query.order_by(desc(Planet.diameter))
+    planets = db.session.scalars(query)
+
+    planet_response = []
+
+    for planet in planets:
+        planet_response.append(
+            {
+                "id": planet.id,
+                "name": planet.name,
+                "description": planet.description,
+                "diameter": planet.diameter
+            }
+        )
+    return planet_response
+
+
+@planets_bp.post("")
+def create_planet():
+    request_body = request.get_json()
+    name = request_body["name"]
+    description = request_body["description"]
+    diameter = request_body["diameter"]
+
+    new_planet = Planet(name=name, description=description, diameter=diameter)
+    db.session.add(new_planet)
+    db.session.commit()
+
+    response = {
+
+        "id": new_planet.id,
+        "name": new_planet.name,
+        "description": new_planet.description,
+        "diameter": new_planet.diameter
+    }
+    return response, 201
+
+
+@planets_bp.get("/<planet_id>")
+def get_one_planet(planet_id):
+    planet = validate_planet(planet_id) 
+
+    return {
+
+        "id": planet.id,
+        "name": planet.name,
+        "description": planet.description,
+        "diameter": planet.diameter
+    }
+
+
+@planets_bp.put("/<planet_id>")
+def update_planet(planet_id):
+    planet = validate_planet(planet_id)
+    request_body = request.get_json()
+
+    planet.name = request_body["name"]
+    planet.description = request_body["description"]
+    planet.diameter = request_body["diameter"]
+    db.session.commit()
+
+    return Response(status=204, mimetype="application/json")
+
+
+@planets_bp.delete("/<planet_id>")
+def delete_planet(planet_id):
+    planet = validate_planet(planet_id)
+    db.session.delete(planet)
+    db.session.commit()
+
+    return Response(status=204, mimetype="application/json")
+
+
+def validate_planet(planet_id):
+    try:
+        planet_id = int(planet_id)
+    except:
+        response = {"message": f"planet {planet_id} invalid"}
+        abort(make_response(response, 400))
+
+    query = db.select(Planet).where(Planet.id == planet_id)
+    planet = db.session.scalar(query)
+
+    if not planet:
+        response = {"message": f"planet {planet_id} not found"}
+        abort(make_response(response, 404))
+
+    return planet 

migrations/README

@@ -0,0 +1 @@
+Single-database configuration for Flask.

migrations/alembic.ini

@@ -0,0 +1,50 @@
+# 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,flask_migrate
+
+[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
+
+[logger_flask_migrate]
+level = INFO
+handlers =
+qualname = flask_migrate
+
+[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 +1,115 @@
+import logging
+from logging.config import fileConfig
+
+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')
+
+
+def get_engine():
+    try:
+        # this works with Flask-SQLAlchemy<3 and Alchemical
+        return current_app.extensions['migrate'].db.get_engine()
+    except (TypeError, AttributeError):
+        # this works with Flask-SQLAlchemy>=3
+        return current_app.extensions['migrate'].db.engine
+
+
+def get_engine_url():
+    try:
+        return get_engine().url.render_as_string(hide_password=False).replace(
+            '%', '%%')
+    except AttributeError:
+        return str(get_engine().url).replace('%', '%%')
+
+
+# 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', get_engine_url())
+target_db = current_app.extensions['migrate'].db
+
+# 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 get_metadata():
+    if hasattr(target_db, 'metadatas'):
+        return target_db.metadatas[None]
+    return target_db.metadata
+
+
+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=get_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.')
+
+    conf_args = current_app.extensions['migrate'].configure_args
+    if conf_args.get("process_revision_directives") is None:
+        conf_args["process_revision_directives"] = process_revision_directives
+
+    connectable = get_engine()
+
+    with connectable.connect() as connection:
+        context.configure(
+            connection=connection,
+            target_metadata=get_metadata(),
+            **conf_args
+        )
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()

migrations/script.py.mako

@@ -0,0 +1,24 @@
+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+# revision identifiers, used by Alembic.
+revision = ${repr(up_revision)}
+down_revision = ${repr(down_revision)}
+branch_labels = ${repr(branch_labels)}
+depends_on = ${repr(depends_on)}
+
+
+def upgrade():
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade():
+    ${downgrades if downgrades else "pass"}