Added in_use and priority_id field for channels urls. Added priorities table. Setup sql alchemy migration. Generate first migration.

alembic/README

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+Generic single-database configuration.

alembic/env.py

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+import os
+from logging.config import fileConfig
+
+from sqlalchemy import engine_from_config
+from sqlalchemy import pool
+
+from alembic import context
+from app.utils.database import get_db_credentials
+from app.models.db import Base
+
+# 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)
+
+# Setup target metadata for autogenerate support
+target_metadata = Base.metadata
+
+# Override sqlalchemy.url with dynamic credentials
+if not context.is_offline_mode():
+    config.set_main_option('sqlalchemy.url', get_db_credentials())
+
+# 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 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_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
+        )
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()

alembic/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:
+    """Upgrade schema."""
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    ${downgrades if downgrades else "pass"}

alembic/versions/036879e47172_add_priority_and_in_use_fields.py

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+"""Add priority and in_use fields
+
+Revision ID: 036879e47172
+Revises: 
+Create Date: 2025-05-26 19:21:32.285656
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = '036879e47172'
+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:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    # 1. Create priorities table if not exists
+    if not op.get_bind().engine.dialect.has_table(op.get_bind(), 'priorities'):
+        op.create_table('priorities',
+            sa.Column('id', sa.Integer(), nullable=False),
+            sa.Column('description', sa.String(), nullable=False),
+            sa.PrimaryKeyConstraint('id')
+        )
+    
+    # 2. Insert default priorities (skip if already exists)
+    op.execute("""
+        INSERT INTO priorities (id, description)
+        VALUES (100, 'High'), (200, 'Medium'), (300, 'Low')
+        ON CONFLICT (id) DO NOTHING
+    """)
+    # Add new columns with temporary nullable=True
+    op.add_column('channels_urls', sa.Column('in_use', sa.Boolean(), nullable=True))
+    op.add_column('channels_urls', sa.Column('priority_id', sa.Integer(), nullable=True))
+    
+    # Set default values
+    op.execute("UPDATE channels_urls SET in_use = false, priority_id = 100")
+    
+    # Convert to NOT NULL
+    op.alter_column('channels_urls', 'in_use', nullable=False)
+    op.alter_column('channels_urls', 'priority_id', nullable=False)
+    op.create_foreign_key(None, 'channels_urls', 'priorities', ['priority_id'], ['id'])
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_constraint('channels_urls_priority_id_fkey', 'channels_urls', type_='foreignkey')
+    op.drop_column('channels_urls', 'priority_id')
+    op.drop_column('channels_urls', 'in_use')
+    op.drop_table('priorities')
+    # ### end Alembic commands ###