Add migration utility & score table

app.py

@@ -4,6 +4,7 @@ from flask import session
 from flask import request
 from flask import redirect
 from flask import url_for
+from flask_migrate import Migrate
 
 from werkzeug.security import generate_password_hash, check_password_hash
 
@@ -91,3 +92,5 @@ def game_answer():
         return render_template("game/answer.html", message=message)
     elif request.method == "GET":
         return render_template("game/new.html")
+
+migrate = Migrate(app, db)

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 +1,91 @@
+from __future__ import with_statement
+
+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')
+
+# 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.get_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 = current_app.extensions['migrate'].db.get_engine()
+
+    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"}

migrations/versions/d9b0e75aca5e_initial_migration.py

@@ -0,0 +1,34 @@
+"""Initial migration.
+
+Revision ID: d9b0e75aca5e
+Revises: 
+Create Date: 2022-05-26 10:57:06.959999
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = 'd9b0e75aca5e'
+down_revision = None
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('userscore',
+    sa.Column('user_id', sa.Integer(), nullable=False),
+    sa.Column('score_value', sa.Integer(), nullable=True),
+    sa.Column('user_level', sa.Integer(), nullable=True),
+    sa.ForeignKeyConstraint(['user_id'], ['user.id'], ),
+    sa.PrimaryKeyConstraint('user_id')
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_table('userscore')
+    # ### end Alembic commands ###

model.py

@@ -1,4 +1,5 @@
 from flask_sqlalchemy import SQLAlchemy
+from sqlalchemy.orm import declarative_base, relationship
 
 db = SQLAlchemy()
 
@@ -9,3 +10,13 @@ class User(db.Model):
     username = db.Column(db.String(64), unique=True)
     email = db.Column(db.String(64), unique=True, index=True)
     password = db.Column(db.String(128))
+
+class Score(db.Model):
+    __tablename__ = 'userscore'
+    
+    user_id = db.Column(db.Integer, db.ForeignKey(User.id), primary_key=True)
+    score_value = db.Column(db.Integer)
+    user_level = db.Column(db.Integer, default = 1)
+    user = relationship("User", foreign_keys="User.id")
+
+    

requirements.txt

@@ -1,9 +1,12 @@
+alembic==1.7.7
 click==8.1.3
 Flask==2.1.2
+Flask-Migrate==3.1.0
 Flask-SQLAlchemy==2.5.1
 greenlet==1.1.2
 itsdangerous==2.1.2
 Jinja2==3.1.2
+Mako==1.2.0
 MarkupSafe==2.1.1
 mysql-connector-python==8.0.29
 protobuf==3.20.1