Updating to support categories

backend/alembic/README

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+Generic single-database configuration.

backend/alembic/env.py

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+import asyncio
+from logging.config import fileConfig
+
+from sqlalchemy import engine_from_config, pool
+from sqlmodel import Session, SQLModel, create_engine
+from sqlmodel.ext.asyncio.session import AsyncEngine
+
+from alembic import context
+from src.database.engine import engine
+from src.models import *  # necessarily to import something from file where your models are stored
+
+# 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
+target_metadata = None
+
+# Interpret the config file for Python logging.
+# This line sets up loggers basically.
+fileConfig(config.config_file_name)
+
+# add your model's MetaData object here
+# for 'autogenerate' support
+# from myapp import mymodel
+# target_metadata = mymodel.Base.metadata
+target_metadata = None 
+# comment line above and instead of that write
+target_metadata = SQLModel.metadata
+
+
+async 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.
+
+    """
+    connectable = engine
+
+    async with connectable.connect() as connection:
+        await connection.run_sync(do_run_migrations)
+
+def do_run_migrations(connection):
+    context.configure(connection=connection, target_metadata=target_metadata, render_as_batch=True)
+
+    with context.begin_transaction():
+
+        context.run_migrations()
+
+
+
+async def run_migrations_online() -> None:
+    """Run migrations in 'online' mode.
+
+    In this scenario we need to create an Engine
+    and associate a connection with the context.
+
+    """
+    connectable = engine
+
+    async with connectable.connect() as connection:
+        await connection.run_sync(do_run_migrations)
+
+if context.is_offline_mode():
+    asyncio.run(run_migrations_offline())
+else:
+    asyncio.run(run_migrations_online())

backend/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 ""}
+import sqlmodel
+
+# 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() -> None:
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade() -> None:
+    ${downgrades if downgrades else "pass"}

backend/alembic/versions/2d2d4523082b_add_category_table.py

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+"""add category table
+
+Revision ID: 2d2d4523082b
+Revises: 
+Create Date: 2023-03-09 20:29:44.081609
+
+"""
+import sqlalchemy as sa
+import sqlmodel
+
+from alembic import op
+from src.models.category import Category
+
+# revision identifiers, used by Alembic.
+revision = '2d2d4523082b'
+down_revision = None
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # create category table
+    Category.__table__.create(bind=op.get_bind())
+
+    op.bulk_insert(
+        Category.__table__,
+        [
+            {"id": 1, "name": "Alfabet"},
+        ]
+    )
+    
+    with op.batch_alter_table('sign', schema=None) as batch_op:
+        # create column category_id
+        batch_op.add_column(sa.Column('category_id', sa.Integer(), nullable=True, default=1))
+        batch_op.create_foreign_key("sign_category", 'category', ['category_id'], ['id'])
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('sign', schema=None) as batch_op:
+        batch_op.drop_constraint("sign_category", type_='foreignkey')
+        batch_op.drop_column('category_id')
+    # drop category table
+    Category.__table__.drop(bind=op.get_bind())
+
+    # ### end Alembic commands ###