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

alembic/versions/036879e47172_add_priority_and_in_use_fields.py

@@ -0,0 +1,59 @@
+"""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 ###