Feat: Q&A format segmentation support (#668)

Co-authored-by: jyong <718720800@qq.com>
Co-authored-by: StyleZhang <jasonapring2015@outlook.com>

api/migrations/versions/8d2d099ceb74_add_qa_model_support.py

@@ -0,0 +1,42 @@
+"""add_qa_model_support
+
+Revision ID: 8d2d099ceb74
+Revises: a5b56fb053ef
+Create Date: 2023-07-18 15:25:15.293438
+
+"""
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision = '8d2d099ceb74'
+down_revision = '7ce5a52e4eee'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('document_segments', schema=None) as batch_op:
+        batch_op.add_column(sa.Column('answer', sa.Text(), nullable=True))
+        batch_op.add_column(sa.Column('updated_by', postgresql.UUID(), nullable=True))
+        batch_op.add_column(sa.Column('updated_at', sa.DateTime(), server_default=sa.text('CURRENT_TIMESTAMP(0)'), nullable=False))
+
+    with op.batch_alter_table('documents', schema=None) as batch_op:
+        batch_op.add_column(sa.Column('doc_form', sa.String(length=255), server_default=sa.text("'text_model'::character varying"), nullable=False))
+
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('documents', schema=None) as batch_op:
+        batch_op.drop_column('doc_form')
+
+    with op.batch_alter_table('document_segments', schema=None) as batch_op:
+        batch_op.drop_column('updated_at')
+        batch_op.drop_column('updated_by')
+        batch_op.drop_column('answer')
+
+    # ### end Alembic commands ###