feat: add alembic configuration

alembic.ini

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+# A generic, single database configuration.
+
+[alembic]
+# path to migration scripts
+# script_location = alembic
+script_location = app\\database\\alembic
+
+# template used to generate migration files
+file_template = %%(year)d-%%(month).2d-%%(day).2d_%%(rev)s_%%(slug)s
+
+# timezone to use when rendering the date
+# within the migration file as well as the filename.
+# string value is passed to dateutil.tz.gettz()
+# leave blank for localtime
+# timezone =
+
+# max length of characters to apply to the
+# "slug" field
+# truncate_slug_length = 40
+
+# set to 'true' to run the environment during
+# the 'revision' command, regardless of autogenerate
+# revision_environment = false
+
+# set to 'true' to allow .pyc and .pyo files without
+# a source .py file to be detected as revisions in the
+# versions/ directory
+# sourceless = false
+
+# version location specification; this defaults
+# to alembic/versions.  When using multiple version
+# directories, initial revisions must be specified with --version-path
+# version_locations = %(here)s/bar %(here)s/bat alembic/versions
+
+# the output encoding used when revision files
+# are written from script.py.mako
+# output_encoding = utf-8
+
+# sqlalchemy.url = driver://user:pass@localhost/dbname
+
+
+[post_write_hooks]
+# post_write_hooks defines scripts or Python functions that are run
+# on newly generated revision scripts.  See the documentation for further
+# detail and examples
+
+# format using "black" - use the console_scripts runner, against the "black" entrypoint
+# hooks=black
+# black.type=console_scripts
+# black.entrypoint=black
+# black.options=-l 79
+
+# 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

app/database/alembic/README

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+Generic single-database configuration.
+
+# following command will run all migration script and bring it to latest version
+alembic upgrade head
+
+# If we like to incrementally upgrade and check for some errors
+alembic upgrade +1
+
+# To undo last migration
+alembic downgrade -1
+
+# To get more information
+alembic current
+alembic history - verbose

app/database/alembic/env.py

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+from logging.config import fileConfig
+import os
+
+from alembic import context
+from sqlalchemy import create_engine
+
+from app import config as app_config
+from app.database.models import Base
+
+
+SQLALCHEMY_DATABASE_URL = os.getenv(
+    "DATABASE_CONNECTION_STRING", app_config.DEVELOPMENT_DATABASE_STRING)
+
+# 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, disable_existing_loggers=False)
+
+# add your model's MetaData object here
+# for 'autogenerate' support
+target_metadata = Base.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 = SQLALCHEMY_DATABASE_URL
+    context.configure(
+        url=url,
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+    )
+
+    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.
+
+    """
+
+    connectable = create_engine(SQLALCHEMY_DATABASE_URL)
+
+    with connectable.connect() as connection:
+        context.configure(
+            connection=connection, target_metadata=target_metadata,
+        )
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()

app/database/alembic/script.py.mako

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+"""${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"}

app/database/alembic/versions/91b42971b0df_.py

@@ -0,0 +1,135 @@
+"""empty message
+
+Revision ID: 91b42971b0df
+Revises:
+Create Date: 2021-02-06 16:15:07.861957
+
+"""
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import sqlite
+
+# revision identifiers, used by Alembic.
+revision = '91b42971b0df'
+down_revision = None
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_index('ix_categories_id', table_name='categories')
+    op.drop_table('categories')
+    op.drop_index('ix_invitations_id', table_name='invitations')
+    op.drop_table('invitations')
+    op.drop_index('ix_users_id', table_name='users')
+    op.drop_table('users')
+    op.drop_index('ix_quotes_id', table_name='quotes')
+    op.drop_table('quotes')
+    op.drop_index('ix_wikipedia_events_id', table_name='wikipedia_events')
+    op.drop_table('wikipedia_events')
+    op.drop_index('ix_zodiac-signs_id', table_name='zodiac-signs')
+    op.drop_table('zodiac-signs')
+    op.drop_index('ix_events_id', table_name='events')
+    op.drop_table('events')
+    op.drop_index('ix_user_event_id', table_name='user_event')
+    op.drop_table('user_event')
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('user_event',
+                    sa.Column('id', sa.INTEGER(), nullable=False),
+                    sa.Column('user_id', sa.INTEGER(), nullable=True),
+                    sa.Column('event_id', sa.INTEGER(), nullable=True),
+                    sa.ForeignKeyConstraint(['event_id'], ['events.id'], ),
+                    sa.ForeignKeyConstraint(['user_id'], ['users.id'], ),
+                    sa.PrimaryKeyConstraint('id')
+                    )
+    op.create_index('ix_user_event_id', 'user_event', ['id'], unique=False)
+    op.create_table('events',
+                    sa.Column('id', sa.INTEGER(), nullable=False),
+                    sa.Column('title', sa.VARCHAR(), nullable=False),
+                    sa.Column('start', sa.DATETIME(), nullable=False),
+                    sa.Column('end', sa.DATETIME(), nullable=False),
+                    sa.Column('content', sa.VARCHAR(), nullable=True),
+                    sa.Column('location', sa.VARCHAR(), nullable=True),
+                    sa.Column('color', sa.VARCHAR(), nullable=True),
+                    sa.Column('owner_id', sa.INTEGER(), nullable=True),
+                    sa.Column('category_id', sa.INTEGER(), nullable=True),
+                    sa.ForeignKeyConstraint(
+                        ['category_id'], ['categories.id'], ),
+                    sa.ForeignKeyConstraint(['owner_id'], ['users.id'], ),
+                    sa.PrimaryKeyConstraint('id')
+                    )
+    op.create_index('ix_events_id', 'events', ['id'], unique=False)
+    op.create_table('zodiac-signs',
+                    sa.Column('id', sa.INTEGER(), nullable=False),
+                    sa.Column('name', sa.VARCHAR(), nullable=False),
+                    sa.Column('start_month', sa.INTEGER(), nullable=False),
+                    sa.Column('start_day_in_month',
+                              sa.INTEGER(), nullable=False),
+                    sa.Column('end_month', sa.INTEGER(), nullable=False),
+                    sa.Column('end_day_in_month',
+                              sa.INTEGER(), nullable=False),
+                    sa.PrimaryKeyConstraint('id')
+                    )
+    op.create_index('ix_zodiac-signs_id', 'zodiac-signs', ['id'], unique=False)
+    op.create_table('wikipedia_events',
+                    sa.Column('id', sa.INTEGER(), nullable=False),
+                    sa.Column('date_', sa.VARCHAR(), nullable=False),
+                    sa.Column('wikipedia', sa.VARCHAR(), nullable=False),
+                    sa.Column('events', sqlite.JSON(), nullable=True),
+                    sa.Column('date_inserted', sa.DATETIME(), nullable=True),
+                    sa.PrimaryKeyConstraint('id')
+                    )
+    op.create_index('ix_wikipedia_events_id',
+                    'wikipedia_events', ['id'], unique=False)
+    op.create_table('quotes',
+                    sa.Column('id', sa.INTEGER(), nullable=False),
+                    sa.Column('text', sa.VARCHAR(), nullable=False),
+                    sa.Column('author', sa.VARCHAR(), nullable=True),
+                    sa.PrimaryKeyConstraint('id')
+                    )
+    op.create_index('ix_quotes_id', 'quotes', ['id'], unique=False)
+    op.create_table('users',
+                    sa.Column('id', sa.INTEGER(), nullable=False),
+                    sa.Column('username', sa.VARCHAR(), nullable=False),
+                    sa.Column('email', sa.VARCHAR(), nullable=False),
+                    sa.Column('password', sa.VARCHAR(), nullable=False),
+                    sa.Column('full_name', sa.VARCHAR(), nullable=True),
+                    sa.Column('language', sa.VARCHAR(), nullable=True),
+                    sa.Column('description', sa.VARCHAR(), nullable=True),
+                    sa.Column('avatar', sa.VARCHAR(), nullable=True),
+                    sa.Column('telegram_id', sa.VARCHAR(), nullable=True),
+                    sa.Column('is_active', sa.BOOLEAN(), nullable=True),
+                    sa.CheckConstraint('is_active IN (0, 1)'),
+                    sa.PrimaryKeyConstraint('id'),
+                    sa.UniqueConstraint('email'),
+                    sa.UniqueConstraint('telegram_id'),
+                    sa.UniqueConstraint('username')
+                    )
+    op.create_index('ix_users_id', 'users', ['id'], unique=False)
+    op.create_table('invitations',
+                    sa.Column('id', sa.INTEGER(), nullable=False),
+                    sa.Column('status', sa.VARCHAR(), nullable=False),
+                    sa.Column('recipient_id', sa.INTEGER(), nullable=True),
+                    sa.Column('event_id', sa.INTEGER(), nullable=True),
+                    sa.Column('creation', sa.DATETIME(), nullable=True),
+                    sa.ForeignKeyConstraint(['event_id'], ['events.id'], ),
+                    sa.ForeignKeyConstraint(['recipient_id'], ['users.id'], ),
+                    sa.PrimaryKeyConstraint('id')
+                    )
+    op.create_index('ix_invitations_id', 'invitations', ['id'], unique=False)
+    op.create_table('categories',
+                    sa.Column('id', sa.INTEGER(), nullable=False),
+                    sa.Column('name', sa.VARCHAR(), nullable=False),
+                    sa.Column('color', sa.VARCHAR(), nullable=False),
+                    sa.Column('user_id', sa.INTEGER(), nullable=False),
+                    sa.ForeignKeyConstraint(['user_id'], ['users.id'], ),
+                    sa.PrimaryKeyConstraint('id'),
+                    sa.UniqueConstraint('user_id', 'name', 'color')
+                    )
+    op.create_index('ix_categories_id', 'categories', ['id'], unique=False)
+    # ### end Alembic commands ###