SL-07 BE

app/__init__.py

@@ -10,22 +10,40 @@
 load_dotenv()
 
 
-def create_app():
+def create_app(test_config=None):
     app = Flask(__name__)
     app.config["SQLALCHEMY_TRACK_MODIFICATIONS"] = False
 
-    app.config["SQLALCHEMY_DATABASE_URI"] = os.environ.get(
+
+    if test_config is None:
+        app.config["SQLALCHEMY_DATABASE_URI"] = os.environ.get(
         "SQLALCHEMY_DATABASE_URI")
+    else:
+        # used for running testing routes
+        app.config["TESTING"] = True
+        app.config["SQLALCHEMY_DATABASE_URI"] = os.environ.get(
+            "SQLALCHEMY_TEST_DATABASE_URI")
+
+
 
     # Import models here for Alembic setup
     # from app.models.ExampleModel import ExampleModel
+    from app.models.card import Card
+    from app.models.board import Board
+
+
 
     db.init_app(app)
     migrate.init_app(app, db)
 
     # Register Blueprints here
-    # from .routes import example_bp
-    # app.register_blueprint(example_bp)
+    from .card_routes import cards_bp
+    app.register_blueprint(cards_bp)
+
+    from .board_routes import board_bp
+    app.register_blueprint(board_bp)
+
 
+    app.config['CORS_HEADERS'] = 'Content-Type'
     CORS(app)
     return app

app/board_routes.py

@@ -0,0 +1,78 @@
+from flask import Blueprint, request, jsonify, make_response
+from .card_routes import validate_model
+from app.models.card import Card
+from app.models.board import Board
+from app import db
+
+board_bp = Blueprint('board_bp', __name__, url_prefix='/boards')
+
+
+@board_bp.route("", methods=["POST"])
+def create_board():
+    request_body = request.get_json()
+    title = request_body['title']
+    owner = request_body['owner']
+    if len(request_body) != 2:
+        return {"details": "Invalid Data"}, 400
+
+    if not owner or not title:
+        return {"details": "Title and/or Owner was left blank"}
+    new_board = Board.from_dict_to_object(request_body)
+
+    db.session.add(new_board)
+    db.session.commit()
+
+    return make_response(jsonify({"board": new_board.to_dict()}), 201)
+
+
+@board_bp.route("/<id>", methods=["GET"])
+def read_specific_board(id):
+    board = validate_model(Board, id)
+    response_body = board.to_dict()
+    return make_response(jsonify(response_body), 200)
+
+
+@board_bp.route("", methods=["GET"])
+def read_all_boards():
+    boards = Board.query.all()
+    board_response = [board.to_dict() for board in boards]
+
+    return make_response(jsonify(board_response), 200)
+
+
+@board_bp.route("/<board_id>/cards", methods=["GET"])
+def read_all_cards(board_id):
+    board = validate_model(Board, board_id)
+    boards_response = [card.to_dict() for card in board.cards]
+    return(jsonify(boards_response))
+
+
+@board_bp.route("/<board_id>/cards", methods=["POST"])
+def add_card_to_board(board_id):
+    request_body = request.get_json()
+    message = request_body["message"]
+    if not message:
+        return {"details": "Invalid Data"}, 400
+    if len(message) > 40:
+        return {"details": "You have gone over the 40 character message limit."}
+    new_card = Card.from_dict_to_object(request_body)
+
+    db.session.add(new_card)
+
+
+    board = validate_model(Board, board_id)
+    board.cards.append(new_card)
+
+    db.session.commit()
+
+    return make_response(jsonify({'board_id': board.board_id, 'cards': [card.to_dict() for card in board.cards]}), 200)
+
+
+@board_bp.route("/<id>", methods=["DELETE"])
+def delete_board(id):
+    board = validate_model(Board, id)
+
+    db.session.delete(board)
+    db.session.commit()
+
+    return make_response(jsonify({"details": f"Board {id} '{board.title}' successfully deleted"}), 200)

app/card_routes.py

@@ -0,0 +1,53 @@
+from flask import Blueprint, request, jsonify, make_response, abort
+from app.models.card import Card
+from app import db
+
+cards_bp = Blueprint('cards_bp', __name__, url_prefix='/cards')
+
+
+def validate_model(cls, model_id):
+    try:
+        model_id = int(model_id)
+    except:
+        abort(make_response({"details": "Invalid Data"}, 400))
+    model = cls.query.get(model_id)
+
+    if not model:
+        abort(make_response(
+            {"details": f"{cls.__name__} {model_id} not found"}, 404))
+    return model
+
+
+@cards_bp.route("", methods=["POST"])
+def create_card():
+    request_body = request.get_json()
+    message = request_body["message"]
+    if not message:
+        return {"details": "Invalid Data"}, 400
+    if len(message) > 40:
+        return {"details": "You have gone over the 40 character message limit."}
+    new_card = Card.from_dict_to_object(request_body)
+
+    db.session.add(new_card)
+    db.session.commit()
+
+    return make_response(jsonify({"card": new_card.to_dict()}), 201)
+
+
+@cards_bp.route("/<id>", methods=["DELETE"])
+def delete_card(id):
+
+    card = validate_model(Card, id)
+
+    db.session.delete(card)
+    db.session.commit()
+
+    return make_response(jsonify({"details": f"Card {id} '{card.message}' successfully deleted"}), 200)
+
+@cards_bp.route("/<id>", methods=["PATCH"])
+def like_card_with_id(id):
+    card = validate_model(Card, id)
+    card.likes_count += 1
+
+    db.session.commit()
+    return jsonify(card.to_dict())

app/models/__init__.py

@@ -0,0 +1,3 @@
+
+
+

app/models/board.py

@@ -1 +1,27 @@
 from app import db
+from app.models.card import Card
+
+class Board(db.Model):
+    board_id = db.Column(db.Integer, primary_key=True)
+    title = db.Column(db.String)
+    owner = db.Column(db.String)
+    cards = db.relationship("Card", back_populates="board", lazy=True, passive_deletes=True)
+
+
+    def to_dict(self, cards=False):
+        if not self.cards and cards==False:
+            return {
+                'board_id': self.board_id,
+                'title': self.title,
+                'owner': self.owner
+                }
+        else:
+            return {
+                'board_id': self.board_id,
+                'title': self.title,
+                'cards': [card.to_dict() for card in self.cards],
+                'owner': self.owner
+                }
+    @classmethod
+    def from_dict_to_object(cls,data_dict):
+        return cls(title=data_dict["title"], owner=data_dict['owner'])

app/models/card.py

@@ -1 +1,26 @@
 from app import db
+
+class Card(db.Model):
+    card_id = db.Column(db.Integer, primary_key=True)
+    message = db.Column(db.String)
+    board = db.relationship("Board", back_populates="cards", lazy=True)
+    # an object from the card class can accept a relationship from an object 
+    # that's from the Board class. backpopulates signals that the specific board 
+    # object will now display this specific card in its board.cards attribute
+    board_id = db.Column(db.Integer, db.ForeignKey('board.board_id', ondelete='CASCADE'), nullable=True)
+    likes_count = db.Column(db.Integer, default=0)
+
+    def to_dict(self):
+        card_as_dict = {}
+        card_as_dict["card_id"] = self.card_id
+        card_as_dict["message"] = self.message
+        card_as_dict["likes_count"] = self.likes_count
+        card_as_dict["board_id"] = self.board_id
+        return card_as_dict
+    @classmethod
+    def from_dict_to_object(cls,data_dict):
+        return cls(message=data_dict["message"])
+
+
+
+

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()