kysely-mapper/dist/esm/mappers/table-mapper.js

Flexible Kysely-based utility for mapping between tables and objects

import { AbstractTableMapper } from './abstract-table-mapper.js';
/**
 * Table mapper that defaults to passing through all query inputs and output
 * unchanged, allowing the selective overloading of transforms.
 * @typeParam DB Interface whose fields are table names defining tables.
 * @typeParam TB Name of the table.
 * @typeParam KeyColumns Tuple of the names of the table's key columns.
 *  Defaults to `[]`, indicating no key columns. Supports up to 4 columns.
 * @typeParam SelectedColumns Columns to return from selection queries.
 *  Defaults to `['*']`, returning all columns. May specify aliases.
 * @typeParam SelectedObject Type of objects returned by select queries.
 * @typeParam InsertedObject Type of objects inserted into the table.
 * @typeParam UpdatingObject Type of objects used to update rows of the table.
 * @typeParam Type of the count of the number of affected rows.
 * @typeParam InsertReturnColumns Columns to return from the table on insert
 *  queries that return columns. `['*']` returns all columns; `[]` returns
 *  none. May specify aliases. Defaults to `KeyColumns`.
 * @typeParam UpdateReturnColumns Columns to return from the table on update
 *  queries that return columns. `['*']` returns all columns; `[]` returns
 *  none and is the default. May specify aliases.
 * @typeParam InsertReturn Type returned from inserts. Defaults to an object
 *  whose properties are the columns of `InsertReturnColumns`.
 * @typeParam UpdateReturn Type returned from updates. Defaults to an object
 *  whose properties are the columns of `UpdateReturnColumns`.
 */
export class TableMapper extends AbstractTableMapper {
    /**
     * Returns a new table mapper that uses the provided transformations, along
     * with the settings of the current table mapper.
     * @param transforms The transforms to use.
     * @returns A new table mapper that uses the provided transforms.
     */
    withTransforms(transforms) {
        const transformingTableMapper = new TableMapper(this.db, this.tableName, this.settings);
        transformingTableMapper.transforms = transforms;
        return transformingTableMapper;
    }
    /**
     * Returns a new table mapper that issues queries in the provided
     * transaction, using the present table mapper's configuration.
     * @param transaction The transaction to use.
     * @returns A new table mapper that issues queries in the provided
     * transaction.
     */
    forTransaction(trx) {
        return new TableMapper(trx, this);
    }
}
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