48 lines
1.6 KiB
Python
48 lines
1.6 KiB
Python
"""How often a source should reconcile itself.
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Until now a sync ran only when an operator asked for one, which made an index
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that keeps step with its folder or repository something a person had to
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remember rather than something the platform did. ``sync_interval_seconds``
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is what the scheduler reads.
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Nullable, with no server default, on purpose. NULL means *only when asked* --
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exactly what every existing source already does -- so this migration changes
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the behaviour of precisely nothing until an operator sets an interval.
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Periodically reading someone's filesystem or repository is a decision, not
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something an upgrade should quietly begin doing.
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The partial index covers the scheduler's only query: the sources that have an
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interval at all. In a deployment where most sources are manual, that index
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stays a fraction of the table.
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"""
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from __future__ import annotations
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import sqlalchemy as sa
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from alembic import op
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revision = "0020_source_sync_schedule"
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down_revision = "0019_job_listing_index"
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branch_labels = None
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depends_on = None
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def upgrade() -> None:
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op.add_column(
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"sources",
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sa.Column("sync_interval_seconds", sa.Integer(), nullable=True),
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schema="content",
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)
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op.create_index(
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"ix_content_sources_due",
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"sources",
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["last_sync_at"],
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schema="content",
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postgresql_where=sa.text("sync_interval_seconds IS NOT NULL"),
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)
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def downgrade() -> None:
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op.drop_index("ix_content_sources_due", "sources", schema="content")
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op.drop_column("sources", "sync_interval_seconds", schema="content")
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