37 lines
1.2 KiB
Python
37 lines
1.2 KiB
Python
 
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"""attachments are kept once: inside their message
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An attachment used to be stored twice — inside the raw message blob, and again
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as a blob of its own. Now only the raw message is kept; ``part_index`` says
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which MIME part of it (its position in a walk of the message) holds the
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attachment, so it can be taken out when downloaded. ``blob_sha256`` stays: the
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attachment's content hash, which names its thumbnail and checks what is taken
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out. Rows stored before this have no index; they are found by that hash.
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Existing separate copies are removed by a background pass on the worker
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(app/indexer/attachments.py ``dedupe_existing``), only after checking each one
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can be taken out of its message again.
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Revision ID: 0023
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Revises: 0022
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Create Date: 2026-10-08
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"""
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from __future__ import annotations
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from collections.abc import Sequence
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from alembic import op
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revision: str = "0023"
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down_revision: str | None = "0022"
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branch_labels: str | Sequence[str] | None = None
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depends_on: str | Sequence[str] | None = None
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def upgrade() -> None:
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op.execute("ALTER TABLE attachments ADD COLUMN part_index integer")
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def downgrade() -> None:
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op.execute("ALTER TABLE attachments DROP COLUMN IF EXISTS part_index")
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