shenlong-tanwen
59 lines
2.2 KiB
Plaintext
59 lines
2.2 KiB
Plaintext
import 'remote_asset.entity.dart';
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import 'local_asset.entity.dart';
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-- TRIGGERS ON local_asset_entity
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-- Find and update the remote_id in local_asset_entity and local_id in remote_asset_entity when checksum is set
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CREATE TRIGGER IF NOT EXISTS tr_local_asset_update_checksum_set_ids
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AFTER UPDATE OF checksum ON local_asset_entity
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FOR EACH ROW
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WHEN NEW.checksum IS NOT NULL
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BEGIN
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UPDATE local_asset_entity
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SET remote_id = (SELECT id FROM remote_asset_entity WHERE checksum = NEW.checksum LIMIT 1)
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WHERE id = NEW.id;
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UPDATE remote_asset_entity
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SET local_id = (SELECT id FROM local_asset_entity WHERE checksum = NEW.checksum ORDER BY id ASC LIMIT 1)
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WHERE checksum = NEW.checksum;
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END;
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-- When a local asset is updated, relink remote assets that had a checksum match
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CREATE TRIGGER IF NOT EXISTS tr_local_asset_update_old_checksum_set_remote_asset_local_id
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AFTER UPDATE OF checksum ON local_asset_entity
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FOR EACH ROW
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WHEN OLD.checksum IS NOT NULL
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BEGIN
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UPDATE remote_asset_entity
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SET local_id = (SELECT id FROM local_asset_entity WHERE checksum = OLD.checksum ORDER BY id ASC LIMIT 1)
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WHERE checksum = OLD.checksum;
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END;
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-- remote_asset_entity.checksum is a 1..* relationship with local_asset_entity.checksum.
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-- When a local asset is deleted, update remote assets that had a checksum match
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-- to ensure their local_id is set to the first matching local asset or NULL
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CREATE TRIGGER IF NOT EXISTS tr_local_asset_delete_update_remote_asset_local_id
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AFTER DELETE ON local_asset_entity
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FOR EACH ROW
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WHEN OLD.checksum IS NOT NULL
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BEGIN
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UPDATE remote_asset_entity
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SET local_id = (SELECT id FROM local_asset_entity WHERE checksum = OLD.checksum ORDER BY id ASC LIMIT 1)
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WHERE checksum = OLD.checksum;
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END;
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-- TRIGGERS ON remote_asset_entity
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-- Find and update local_id in remote_asset_entity when a new remote asset is inserted
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CREATE TRIGGER IF NOT EXISTS tr_remote_asset_insert_set_local_id
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AFTER INSERT ON remote_asset_entity
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FOR EACH ROW
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BEGIN
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UPDATE remote_asset_entity
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SET local_id = (SELECT id FROM local_asset_entity WHERE checksum = NEW.checksum ORDER BY id ASC LIMIT 1)
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WHERE id = NEW.id;
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UPDATE local_asset_entity SET remote_id = NEW.id WHERE checksum = NEW.checksum;
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END;
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