bulk insert without hooks - just push to sql db

bulk-insert.ts

async function bulkInsert<entityType extends EntityBase>(
  array: entityType[],
  db: SqlDatabase,
) {
  if (array.length == 0) return

  const chunkSize = 250
  for (let i = 0; i < array.length; i += chunkSize) {
    const items = array.slice(i, i + chunkSize)
    // do whatever

    const c = db.createCommand()
    let sql =
      'insert into ' +
      (await items[0]._.metadata.dbName) +
      ' (' +
      (
        await Promise.all(
          items[0]._.metadata.fields.toArray().map((f) => f.dbName),
        )
      ).join(',') +
      ') values '

    sql += items
      .map(
        (row) =>
          '(' +
          row.$.toArray()
            .map((f) => c.param(f.metadata.valueConverter.toDb!(f.value)))
            .join(', ') +
          ')',
      )
      .join(',')

    await c.execute(sql)
  }
}