56 lines
2.3 KiB
Python
56 lines
2.3 KiB
Python
"""Scope widget conversations and customers to the token that created them
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A widget token the visitor obtained without proving who they are may name an
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existing customer. session_to_agents.conversation_key records which token scope
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created a session, so such a token only resumes its own conversations; existing
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rows stay NULL, the scope of tokens the embedding app vouched for.
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customers.conversation_key records which widget scope created a customer, so a
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token may only edit or merge a customer it created itself.
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Every scope check filters session_to_agents by customer_id, which had no index;
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the index is built CONCURRENTLY so the table keeps taking writes while the
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backend starts. That can't run in a transaction, hence the autocommit block. A
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build that fails part-way leaves an INVALID index that IF NOT EXISTS would then
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skip: if that happens, DROP INDEX ix_session_to_agents_customer_id and restart.
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Revision ID: session_conversation_key_001
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Revises: auth_sessions_001
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Create Date: 2026-10-12
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"""
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from typing import Sequence, Union
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import sqlalchemy as sa
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from alembic import op
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# revision identifiers, used by Alembic.
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# Keep revision ids under 32 characters: alembic_version.version_num is
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# varchar(32).
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revision: str = 'session_conversation_key_001'
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down_revision: Union[str, None] = 'auth_sessions_001'
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branch_labels: Union[str, Sequence[str], None] = None
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depends_on: Union[str, Sequence[str], None] = None
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INDEX_NAME = 'ix_session_to_agents_customer_id'
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def upgrade() -> None:
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op.add_column('session_to_agents', sa.Column('conversation_key', sa.String(64), nullable=True),
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if_not_exists=True)
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op.add_column('customers', sa.Column('conversation_key', sa.String(64), nullable=True),
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if_not_exists=True)
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with op.get_context().autocommit_block():
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op.create_index(
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INDEX_NAME, 'session_to_agents', ['customer_id'],
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unique=False,
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postgresql_concurrently=True,
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if_not_exists=True,
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)
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def downgrade() -> None:
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with op.get_context().autocommit_block():
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op.drop_index(INDEX_NAME, table_name='session_to_agents',
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postgresql_concurrently=True, if_exists=True)
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op.drop_column('customers', 'conversation_key', if_exists=True)
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op.drop_column('session_to_agents', 'conversation_key', if_exists=True)
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