task/50 storage models migrations

sapphire/storage/database/migrations/alembic.ini

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+# A generic, single database configuration.
+
+[alembic]
+# path to migration scripts
+script_location = .
+
+# template used to generate migration file names; The default value is %%(rev)s_%%(slug)s
+# Uncomment the line below if you want the files to be prepended with date and time
+# file_template = %%(year)d_%%(month).2d_%%(day).2d_%%(hour).2d%%(minute).2d-%%(rev)s_%%(slug)s
+
+# sys.path path, will be prepended to sys.path if present.
+# defaults to the current working directory.
+prepend_sys_path = .
+
+# timezone to use when rendering the date within the migration file
+# as well as the filename.
+# If specified, requires the python-dateutil library that can be
+# installed by adding `alembic[tz]` to the pip requirements
+# 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 migrations/versions.  When using multiple version
+# directories, initial revisions must be specified with --version-path.
+# The path separator used here should be the separator specified by "version_path_separator" below.
+# version_locations = %(here)s/bar:%(here)s/bat:migrations/versions
+
+# version path separator; As mentioned above, this is the character used to split
+# version_locations. The default within new alembic.ini files is "os", which uses os.pathsep.
+# If this key is omitted entirely, it falls back to the legacy behavior of splitting on spaces and/or commas.
+# Valid values for version_path_separator are:
+#
+# version_path_separator = :
+# version_path_separator = ;
+# version_path_separator = space
+version_path_separator = os  # Use os.pathsep. Default configuration used for new projects.
+
+# set to 'true' to search source files recursively
+# in each "version_locations" directory
+# new in Alembic version 1.10
+# recursive_version_locations = false
+
+# the output encoding used when revision files
+# are written from script.py.mako
+# output_encoding = utf-8
+
+sqlalchemy.url = postgresql+asyncpg://user:password@localhost:5432/database
+
+
+[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 REVISION_SCRIPT_FILENAME
+
+# lint with attempts to fix using "ruff" - use the exec runner, execute a binary
+# hooks = ruff
+# ruff.type = exec
+# ruff.executable = %(here)s/.venv/bin/ruff
+# ruff.options = --fix REVISION_SCRIPT_FILENAME
+
+# 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

sapphire/storage/database/migrations/env.py

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+import asyncio
+from logging.config import fileConfig
+
+from sqlalchemy import pool
+from sqlalchemy.engine import Connection
+from sqlalchemy.ext.asyncio import async_engine_from_config
+
+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.
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+# add your model's MetaData object here
+# for 'autogenerate' support
+# from myapp import mymodel
+# target_metadata = mymodel.Base.metadata
+from sapphire.storage.database import models
+
+target_metadata = models.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() -> None:
+    """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,
+        dialect_opts={"paramstyle": "named"},
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def do_run_migrations(connection: Connection) -> None:
+    context.configure(connection=connection, target_metadata=target_metadata)
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+async def run_async_migrations() -> None:
+    """In this scenario we need to create an Engine
+    and associate a connection with the context.
+
+    """
+
+    connectable = async_engine_from_config(
+        config.get_section(config.config_ini_section, {}),
+        prefix="sqlalchemy.",
+        poolclass=pool.NullPool,
+    )
+
+    async with connectable.connect() as connection:
+        await connection.run_sync(do_run_migrations)
+
+    await connectable.dispose()
+
+
+def run_migrations_online() -> None:
+    """Run migrations in 'online' mode."""
+
+    asyncio.run(run_async_migrations())
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()

sapphire/storage/database/migrations/script.py.mako

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+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+# revision identifiers, used by Alembic.
+revision: str = ${repr(up_revision)}
+down_revision: Union[str, None] = ${repr(down_revision)}
+branch_labels: Union[str, Sequence[str], None] = ${repr(branch_labels)}
+depends_on: Union[str, Sequence[str], None] = ${repr(depends_on)}
+
+
+def upgrade() -> None:
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade() -> None:
+    ${downgrades if downgrades else "pass"}

sapphire/storage/database/migrations/versions/f49b1a9878de_initial_migration.py

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+"""Initial migration
+
+Revision ID: f49b1a9878de
+Revises: 
+Create Date: 2023-09-28 17:59:38.753868
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = 'f49b1a9878de'
+down_revision: Union[str, None] = None
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    # ### adjusted ###
+    op.create_table('skills',
+    sa.Column('id', sa.String(), nullable=False),
+    sa.Column('name', sa.String(), nullable=True),
+    sa.Column('migrate_to', sa.String(), nullable=True, default=sa.Null),
+    sa.Column('created_at', sa.DateTime(), nullable=False),
+    sa.PrimaryKeyConstraint('id'),
+    sa.UniqueConstraint('id')
+    )
+    op.create_table('specialization_groups',
+    sa.Column('id', sa.String(), nullable=False),
+    sa.Column('name', sa.String(), nullable=True),
+    sa.Column('migrate_to', sa.String(), nullable=True, default=sa.Null),
+    sa.Column('created_at', sa.DateTime(), nullable=False),
+    sa.PrimaryKeyConstraint('id'),
+    sa.UniqueConstraint('id')
+    )
+    op.create_table('specializations',
+    sa.Column('id', sa.String(), nullable=False),
+    sa.Column('name', sa.String(), nullable=True),
+    sa.Column('is_other', sa.Boolean(), nullable=False, default=sa.False_),
+    sa.Column('group_id', sa.String(), nullable=True),
+    sa.Column('migrate_to', sa.String(), nullable=True, default=sa.Null),
+    sa.Column('created_at', sa.DateTime(), nullable=False),
+    sa.ForeignKeyConstraint(['group_id'], ['specialization_groups.id'], ),
+    sa.PrimaryKeyConstraint('id'),
+    sa.UniqueConstraint('id')
+    )
+    op.create_table('specializations_skills',
+    sa.Column('skill_id', sa.String(), nullable=False),
+    sa.Column('specialization_id', sa.String(), nullable=False),
+    sa.Column('created_at', sa.DateTime(), nullable=False),
+    sa.Column('updated_at', sa.DateTime(), nullable=False),
+    sa.ForeignKeyConstraint(['skill_id'], ['skills.id'], ),
+    sa.ForeignKeyConstraint(['specialization_id'], ['specializations.id'], ),
+    sa.PrimaryKeyConstraint('skill_id', 'specialization_id')
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_table('specializations_skills')
+    op.drop_table('specializations')
+    op.drop_table('specialization_groups')
+    op.drop_table('skills')
+    # ### end Alembic commands ###

sapphire/storage/database/models.py

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+import uuid
+from datetime import datetime
+from typing import Literal, get_args
+
+from sqlalchemy import Enum, ForeignKey, False_, Null
+from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column
+
+class Base(DeclarativeBase):
+    pass
+
+
+class Skill(Base):
+    __tablename__ = "skills"
+
+    id: Mapped[str] = mapped_column(unique=True, primary_key=True)
+    name: Mapped[str | None]
+    migrate_to: Mapped[str | None] = mapped_column(default=Null)
+    created_at: Mapped[datetime] = mapped_column(default=datetime.now)
+
+
+class Specialization(Base):
+    __tablename__ = "specializations"
+
+    id: Mapped[str] = mapped_column(unique=True, primary_key=True)
+    name: Mapped[str | None]
+    is_other: Mapped[bool] = mapped_column(default=False_)
+    group_id: Mapped[str | None] = mapped_column(ForeignKey("specialization_groups.id"))
+    migrate_to: Mapped[str | None] = mapped_column(default=Null)
+    created_at: Mapped[datetime] = mapped_column(default=datetime.now)
+
+
+class SpecializationsSkills(Base):
+    __tablename__ = "specializations_skills"
+
+    skill_id: Mapped[str] = mapped_column(ForeignKey("skills.id"), primary_key=True)
+    specialization_id: Mapped[str] = mapped_column(ForeignKey("specializations.id"), primary_key=True)
+    created_at: Mapped[datetime] = mapped_column(default=datetime.now)
+    updated_at: Mapped[datetime] = mapped_column(default=datetime.now, onupdate=datetime.now)
+
+
+class SpecializationGroup(Base):
+    __tablename__ = "specialization_groups"
+
+    id: Mapped[str] = mapped_column(unique=True, primary_key=True)
+    name: Mapped[str | None]
+    migrate_to: Mapped[str | None] = mapped_column(default=Null)
+    created_at: Mapped[datetime] = mapped_column(default=datetime.now)
+