feat: add class share drafts

ai_knowledge_base_v2/apps/backend/alembic/versions/0017_share_drafts.py

@@ -0,0 +1,51 @@
+"""add share drafts
+
+Revision ID: 0017_share_drafts
+Revises: 0016_teacher_help_cards
+"""
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision = "0017_share_drafts"
+down_revision = "0016_teacher_help_cards"
+branch_labels = None
+depends_on = None
+
+PRIMARY_KEY_TYPE = sa.BigInteger().with_variant(sa.Integer(), "sqlite")
+
+
+def upgrade() -> None:
+    inspector = sa.inspect(op.get_bind())
+    tables = set(inspector.get_table_names())
+    if "sys_share_draft" in tables:
+        return
+    op.create_table(
+        "sys_share_draft",
+        sa.Column("id", PRIMARY_KEY_TYPE, primary_key=True, autoincrement=True),
+        sa.Column("user_id", sa.BigInteger(), sa.ForeignKey("sys_user.id"), nullable=False),
+        sa.Column("topic_session_id", sa.BigInteger(), sa.ForeignKey("sys_topic_session.id"), nullable=False),
+        sa.Column("summary_id", sa.BigInteger(), nullable=True),
+        sa.Column("content", sa.Text(), nullable=False),
+        sa.Column("source", sa.String(30), nullable=False, server_default="topic_summary"),
+        sa.Column("copied", sa.Integer(), nullable=False, server_default="0"),
+        sa.Column("copied_at", sa.DateTime(), nullable=True),
+        sa.Column("created_at", sa.DateTime(), server_default=sa.func.now(), nullable=False),
+    )
+    op.create_index("ix_sys_share_draft_user_id", "sys_share_draft", ["user_id"])
+    op.create_index("ix_sys_share_draft_summary_id", "sys_share_draft", ["summary_id"])
+    op.create_index("ix_sys_share_draft_user_created", "sys_share_draft", ["user_id", "created_at"])
+    op.create_index("ix_sys_share_draft_topic_created", "sys_share_draft", ["topic_session_id", "created_at"])
+
+
+def downgrade() -> None:
+    inspector = sa.inspect(op.get_bind())
+    tables = set(inspector.get_table_names())
+    if "sys_share_draft" not in tables:
+        return
+    op.drop_index("ix_sys_share_draft_topic_created", table_name="sys_share_draft")
+    op.drop_index("ix_sys_share_draft_user_created", table_name="sys_share_draft")
+    op.drop_index("ix_sys_share_draft_summary_id", table_name="sys_share_draft")
+    op.drop_index("ix_sys_share_draft_user_id", table_name="sys_share_draft")
+    op.drop_table("sys_share_draft")