model channels

alembic/versions/7506a3320699_channel_table.py

@@ -0,0 +1,45 @@
+"""channel table
+
+Revision ID: 7506a3320699
+Revises: 69ef23ef1ed1
+Create Date: 2025-09-05 14:12:37.430983
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.sql import table, column
+
+
+# revision identifiers, used by Alembic.
+revision: str = '7506a3320699'
+down_revision: Union[str, Sequence[str], None] = '69ef23ef1ed1'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # Для SQLite: создаём новую таблицу, копируем данные, удаляем старую, переименовываем новую
+    conn = op.get_bind()
+    # 1. Создать новую таблицу
+    op.create_table(
+        'channel_new',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('name', sa.String(length=255), nullable=False),
+        sa.Column('admin_id', sa.Integer(), nullable=True),
+        sa.PrimaryKeyConstraint('id')
+    )
+    # 2. Если старая таблица есть, скопировать данные
+    result = conn.execute(sa.text("SELECT name FROM sqlite_master WHERE type='table' AND name='channel'")).fetchone()
+    if result:
+        conn.execute(sa.text("INSERT INTO channel_new (id, name, admin_id) SELECT id, name, admin_id FROM channel"))
+        op.drop_table('channel')
+    # 3. Переименовать новую таблицу
+    conn.execute(sa.text("ALTER TABLE channel_new RENAME TO channel"))
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    op.drop_table('channel')

models.py

@@ -10,9 +10,9 @@ class Admin(Base):
 class Channel(Base):
     __tablename__ = 'channels'
     id = Column(Integer, primary_key=True)
-    name = Column(String, nullable=False)
+    name = Column(String)
-    link = Column(String, nullable=False)
+    link = Column(String)
-    buttons = relationship('Button', back_populates='channel')
+    admin_id = Column(Integer, ForeignKey('admins.id'))  # если есть таблица admins
 
 class Group(Base):
     __tablename__ = 'groups'