Snow Leopards - Geiselle H. and Justina L.

app/__init__.py

@@ -1,7 +1,35 @@
 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['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
+
+    if not test_config:
+        app.config['SQLALCHEMY_DATABASE_URI'] = os.environ.get("SQLALCHEMY_DATABASE_URI")
+    else:
+        app.config["TESTING"] = True
+        app.config['SQLALCHEMY_DATABASE_URI'] = os.environ.get(
+            "SQLALCHEMY_TEST_DATABASE_URI")
+
+    db.init_app(app)
+    migrate.init_app(app, db)
+
+
+    from .routes import planet
+    from .routes import fictional_caretaker
+    app.register_blueprint(planet.bp)
+    app.register_blueprint(fictional_caretaker.bp)
+
+    from app.models.planet import Planet
+    from app.models.fictional_caretaker import Caretaker
+
     return app

app/models/fictional_caretaker.py

@@ -0,0 +1,16 @@
+from app import db
+
+class Caretaker(db.Model):
+    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
+    name = db.Column(db.String)
+    planets = db.relationship("Planet", back_populates="caretaker")
+
+    @classmethod
+    def from_dict(cls, data_dict):
+        return cls(name=data_dict["name"])
+
+    def to_dict(self):
+        return dict(
+            id=self.id,
+            name=self.name
+        )

app/models/planet.py

@@ -0,0 +1,25 @@
+from app import db
+
+class Planet(db.Model):
+    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
+    name = db.Column(db.String, nullable=False)
+    description = db.Column(db.String, nullable=False)
+    moons = db.Column(db.Integer, nullable=False)
+    caretaker_id = db.Column(db.Integer, db.ForeignKey("caretaker.id"))
+    caretaker = db.relationship("Caretaker", back_populates="planets")
+
+    def to_dict(self):
+        return dict(
+            id=self.id,
+            name=self.name,
+            description=self.description,
+            moons=self.moons
+    )
+
+    @classmethod
+    def from_dict(cls, data_dict):
+        return cls(name=data_dict["name"],
+        description=data_dict["description"],
+        moons=data_dict["moons"])
+
+

app/routes/fictional_caretaker.py

@@ -0,0 +1,49 @@
+from app import db
+from app.models.fictional_caretaker import Caretaker
+from app.models.planet import Planet
+from flask import Blueprint, jsonify, make_response, request
+from app.routes.helper_functions import validate_model
+
+bp = Blueprint("caretakers", __name__, url_prefix="/caretakers")
+
+@bp.route("", methods=["POST"])
+def create_caretaker():
+    request_body = request.get_json()
+    new_caretaker = Caretaker.from_dict(request_body)
+
+    db.session.add(new_caretaker)
+    db.session.commit()
+
+    return make_response(f"Caretaker {new_caretaker.name} successfully created", 201)
+
+
+@bp.route("", methods=["GET"])
+def read_all_caretakers():
+    caretakers = Caretaker.query.all()
+
+    caretakers_response = [caretaker.to_dict() for caretaker in caretakers]
+
+    return jsonify(caretakers_response)
+
+
+@bp.route("/<caretaker_id>/planets", methods=["POST"])
+def create_planet(caretaker_id):
+    caretaker = validate_model(Caretaker, caretaker_id)
+    request_body = request.get_json()
+    new_planet = Planet.from_dict(request_body)
+    new_planet.caretaker = caretaker
+
+    db.session.add(new_planet)
+    db.session.commit()
+
+    return make_response(f"Planet {new_planet.name} cared for by {caretaker.name}", 201)
+
+
+@bp.route("/<caretaker_id>/planets", methods=["GET"])
+def read_one_planet(caretaker_id):
+    caretaker = validate_model(Caretaker, caretaker_id)
+
+    planet_response = [planet.to_dict() for planet in caretaker.planets]
+
+
+    return(jsonify(planet_response))

app/routes/helper_functions.py

@@ -0,0 +1,14 @@
+from flask import abort, make_response
+
+def validate_model(cls, model_id):
+    try:
+        model_id = int(model_id)
+    except:
+        abort(make_response({"message":f"{cls.__name__} {model_id} invalid"}, 400))
+
+    model = cls.query.get(model_id)
+
+    if not model:
+        abort(make_response({"message":f"{cls.__name__} {model_id} not found"}, 404))
+
+    return model

app/routes/planet.py

@@ -0,0 +1,66 @@
+from app import db
+from app.models.planet import Planet
+from flask import Blueprint, jsonify, make_response, request
+from app.routes.helper_functions import validate_model
+
+bp = Blueprint("planets", __name__, url_prefix = "/planets")
+
+@bp.route("/<planet_id>", methods=["GET"])
+def read_one_planet(planet_id):
+    planet = validate_model(Planet, planet_id)
+    return jsonify(planet.to_dict()), 200
+
+@bp.route("", methods=["GET"])
+def read_all_planets():
+    name_query = request.args.get("name")
+    description_query = request.args.get("description")
+    moons_query = request.args.get("moons")
+    limit_query = request.args.get("limit")
+
+    planet_query = Planet.query
+
+    if name_query:
+        planet_query = planet_query.filter_by(name=name_query)
+
+    if description_query:
+        planet_query = planet_query.filter_by(description=description_query)
+
+    if moons_query:
+        planet_query = planet_query.filter_by(moons=moons_query)
+
+    if limit_query:
+        planet_query = planet_query.limit(limit_query)
+
+    planets = planet_query.all()
+
+    planet_response = [planet.to_dict() for planet in planets]
+
+    return jsonify(planet_response)
+
+@bp.route("", methods=["POST"])
+def create_planet():
+    request_body = request.get_json()
+    new_planet = Planet.from_dict(request_body)
+
+    db.session.add(new_planet)
+    db.session.commit()
+    return make_response(f"Planet {new_planet.name} successfully created", 201)
+
+@bp.route("/<planet_id>", methods=["PUT"])
+def update_planet(planet_id):
+    planet = validate_model(Planet, planet_id)
+    request_body = request.get_json()
+
+    planet.name = request_body["name"]
+    planet.description = request_body["description"]
+    planet.moons = request_body["moons"]
+
+    db.session.commit()
+    return make_response(f"Planet #{planet.id} successfully updated", 200)
+
+@bp.route("/<planet_id>", methods=["DELETE"])
+def delete_planet(planet_id):
+    planet = validate_model(Planet, planet_id)
+    db.session.delete(planet)
+    db.session.commit()
+    return make_response(f"Planet #{planet.id} successfully deleted", 200)

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()

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"}