PgliteSession Class — drizzle-orm Architecture

Source Code

drizzle-orm/src/pglite/session.ts lines 123–195

export class PgliteSession<
	TFullSchema extends Record<string, unknown>,
	TSchema extends TablesRelationalConfig,
> extends PgSession<PgliteQueryResultHKT, TFullSchema, TSchema> {
	static override readonly [entityKind]: string = 'PgliteSession';

	private logger: Logger;
	private cache: Cache;

	constructor(
		private client: PgliteClient | Transaction,
		dialect: PgDialect,
		private schema: RelationalSchemaConfig<TSchema> | undefined,
		private options: PgliteSessionOptions = {},
	) {
		super(dialect);
		this.logger = options.logger ?? new NoopLogger();
		this.cache = options.cache ?? new NoopCache();
	}

	prepareQuery<T extends PreparedQueryConfig = PreparedQueryConfig>(
		query: Query,
		fields: SelectedFieldsOrdered | undefined,
		name: string | undefined,
		isResponseInArrayMode: boolean,
		customResultMapper?: (rows: unknown[][]) => T['execute'],
		queryMetadata?: {
			type: 'select' | 'update' | 'delete' | 'insert';
			tables: string[];
		},
		cacheConfig?: WithCacheConfig,
	): PgPreparedQuery<T> {
		return new PglitePreparedQuery(
			this.client,
			query.sql,
			query.params,
			this.logger,
			this.cache,
			queryMetadata,
			cacheConfig,
			fields,
			name,
			isResponseInArrayMode,
			customResultMapper,
		);
	}

	override async transaction<T>(
		transaction: (tx: PgliteTransaction<TFullSchema, TSchema>) => Promise<T>,
		config?: PgTransactionConfig | undefined,
	): Promise<T> {
		return (this.client as PgliteClient).transaction(async (client) => {
			const session = new PgliteSession<TFullSchema, TSchema>(
				client,
				this.dialect,
				this.schema,
				this.options,
			);
			const tx = new PgliteTransaction<TFullSchema, TSchema>(this.dialect, session, this.schema);
			if (config) {
				await tx.setTransaction(config);
			}
			return transaction(tx);
		}) as Promise<T>;
	}

	override async count(sql: SQL): Promise<number> {
		const res = await this.execute<{ rows: [{ count: string }] }>(sql);
		return Number(
			res['rows'][0]['count'],
		);
	}
}