backend: split document assets into assets and objects

backend/migrations/202503240005_create_document_asset_objects/down.sql

@@ -0,0 +1,34 @@
+ALTER TABLE document_assets
+    ADD COLUMN s3_key TEXT;
+
+UPDATE document_assets AS da
+SET s3_key = dao.s3_key
+FROM document_asset_objects AS dao
+WHERE dao.asset_id = da.id
+  AND dao.ordinal = 1
+  AND da.s3_key IS NULL;
+
+ALTER TABLE document_assets
+    ALTER COLUMN s3_key SET NOT NULL;
+
+UPDATE document_assets AS da
+SET metadata = jsonb_set(da.metadata, '{width}', dao.metadata->'width', true)
+FROM document_asset_objects AS dao
+WHERE dao.asset_id = da.id
+  AND dao.ordinal = 1
+  AND dao.metadata ? 'width';
+
+UPDATE document_assets AS da
+SET metadata = jsonb_set(da.metadata, '{height}', dao.metadata->'height', true)
+FROM document_asset_objects AS dao
+WHERE dao.asset_id = da.id
+  AND dao.ordinal = 1
+  AND dao.metadata ? 'height';
+
+DROP INDEX IF EXISTS idx_document_asset_objects_asset_ordinal;
+DROP TABLE IF EXISTS document_asset_objects;
+
+ALTER TABLE document_assets
+    DROP CONSTRAINT IF EXISTS document_assets_cardinality_positive;
+ALTER TABLE document_assets
+    DROP COLUMN IF EXISTS cardinality;

backend/migrations/202503240005_create_document_asset_objects/up.sql

@@ -0,0 +1,54 @@
+ALTER TABLE document_assets
+    ADD COLUMN cardinality INTEGER,
+    ADD CONSTRAINT document_assets_cardinality_positive CHECK (cardinality IS NULL OR cardinality >= 1);
+
+CREATE TABLE document_asset_objects (
+    id UUID PRIMARY KEY,
+    asset_id UUID NOT NULL REFERENCES document_assets(id) ON DELETE CASCADE,
+    ordinal INTEGER NOT NULL,
+    s3_key TEXT NOT NULL,
+    metadata JSONB NOT NULL DEFAULT '{}'::jsonb,
+    CONSTRAINT document_asset_objects_ordinal_positive CHECK (ordinal >= 1),
+    CONSTRAINT document_asset_objects_asset_ordinal_unique UNIQUE (asset_id, ordinal)
+);
+
+CREATE INDEX idx_document_asset_objects_asset_ordinal
+    ON document_asset_objects (asset_id, ordinal);
+
+INSERT INTO document_asset_objects (id, asset_id, ordinal, s3_key, metadata)
+SELECT
+    gen_random_uuid(),
+    id,
+    1,
+    s3_key,
+    '{}'::jsonb
+FROM document_assets;
+
+UPDATE document_asset_objects AS dao
+SET metadata = jsonb_set(dao.metadata, '{width}', da.metadata->'width', true)
+FROM document_assets AS da
+WHERE dao.asset_id = da.id
+  AND dao.ordinal = 1
+  AND da.metadata ? 'width';
+
+UPDATE document_asset_objects AS dao
+SET metadata = jsonb_set(dao.metadata, '{height}', da.metadata->'height', true)
+FROM document_assets AS da
+WHERE dao.asset_id = da.id
+  AND dao.ordinal = 1
+  AND da.metadata ? 'height';
+
+UPDATE document_assets
+SET metadata = metadata - 'width'
+WHERE metadata ? 'width';
+
+UPDATE document_assets
+SET metadata = metadata - 'height'
+WHERE metadata ? 'height';
+
+UPDATE document_assets
+SET cardinality = 1
+WHERE cardinality IS NULL;
+
+ALTER TABLE document_assets
+    DROP COLUMN s3_key;