enh: channel files

backend/open_webui/migrations/versions/6283dc0e4d8d_add_channel_file_table.py

@@ -0,0 +1,54 @@
+"""Add channel file table
+
+Revision ID: 6283dc0e4d8d
+Revises: 3e0e00844bb0
+Create Date: 2025-12-10 15:11:39.424601
+
+"""
+
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+import open_webui.internal.db
+
+
+# revision identifiers, used by Alembic.
+revision: str = "6283dc0e4d8d"
+down_revision: Union[str, None] = "3e0e00844bb0"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "channel_file",
+        sa.Column("id", sa.Text(), primary_key=True),
+        sa.Column("user_id", sa.Text(), nullable=False),
+        sa.Column(
+            "channel_id",
+            sa.Text(),
+            sa.ForeignKey("channel.id", ondelete="CASCADE"),
+            nullable=False,
+        ),
+        sa.Column(
+            "file_id",
+            sa.Text(),
+            sa.ForeignKey("file.id", ondelete="CASCADE"),
+            nullable=False,
+        ),
+        sa.Column("created_at", sa.BigInteger(), nullable=False),
+        sa.Column("updated_at", sa.BigInteger(), nullable=False),
+        # indexes
+        sa.Index("ix_channel_file_channel_id", "channel_id"),
+        sa.Index("ix_channel_file_file_id", "file_id"),
+        sa.Index("ix_channel_file_user_id", "user_id"),
+        # unique constraints
+        sa.UniqueConstraint(
+            "channel_id", "file_id", name="uq_channel_file_channel_file"
+        ),  # prevent duplicate entries
+    )
+
+
+def downgrade() -> None:
+    op.drop_table("channel_file")