getUpdatedColumns() — astro Function Reference

Architecture documentation for the getUpdatedColumns() function in migration-queries.ts from the astro codebase.

Function typescript CoreAstro CoreMiddleware calls 1 called by 1

Entity Profile

CoreAstro→ CoreMiddleware→ getUpdatedColumns() — astro Function Reference

Dependency Diagram

graph TD
  4cd3c863_fa29_c34a_a49a_467807e47651["getUpdatedColumns()"]
  d1459290_7e42_1f92_05bd_dcc3aeda9fd3["migration-queries.ts"]
  4cd3c863_fa29_c34a_a49a_467807e47651 -->|defined in| d1459290_7e42_1f92_05bd_dcc3aeda9fd3
  d8e591b7_f3dd_5f49_beb9_c9047d4d1e02["getTableChangeQueries()"]
  d8e591b7_f3dd_5f49_beb9_c9047d4d1e02 -->|calls| 4cd3c863_fa29_c34a_a49a_467807e47651
  7682e3a8_d373_faeb_f416_795930ac2f26["canChangeTypeWithoutQuery()"]
  4cd3c863_fa29_c34a_a49a_467807e47651 -->|calls| 7682e3a8_d373_faeb_f416_795930ac2f26
  style 4cd3c863_fa29_c34a_a49a_467807e47651 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

packages/db/src/core/cli/migration-queries.ts lines 372–399

function getUpdatedColumns(oldColumns: DBColumns, newColumns: DBColumns): UpdatedColumns {
	const updated: UpdatedColumns = {};
	for (const [key, newColumn] of Object.entries(newColumns)) {
		let oldColumn = oldColumns[key];
		if (!oldColumn) continue;

		if (oldColumn.type !== newColumn.type && canChangeTypeWithoutQuery(oldColumn, newColumn)) {
			// If we can safely change the type without a query,
			// try parsing the old schema as the new schema.
			// This lets us diff the columns as if they were the same type.
			const asNewColumn = columnSchema.safeParse({
				type: newColumn.type,
				schema: oldColumn.schema,
			});
			if (asNewColumn.success) {
				oldColumn = asNewColumn.data;
			}
			// If parsing fails, move on to the standard diff.
		}

		const diff = deepDiff(oldColumn, newColumn);

		if (diff) {
			updated[key] = { old: oldColumn, new: newColumn };
		}
	}
	return updated;
}