selectByQuery method

  1. @override
FutureOr<Iterable<O>> selectByQuery(
  1. String query, {
  2. Object? parameters,
  3. List? positionalParameters,
  4. Map<String, Object?>? namedParameters,
  5. Transaction? transaction,
  6. int? limit,
  7. int? offset,
  8. int? page,
  9. bool? orderByID,
  10. OrderDirection? orderDirection,
  11. EntityResolutionRules? resolutionRules,
})
override

Ordering and pagination:

  • limit: the maximum number of returned entities. Also the page size of page.
  • offset: the return offset, for pagination.
  • page: the 1-based page to return, an ergonomic alternative to offset: it resolves to (page - 1) * limit. Requires a positive limit, and can't be combined with offset. See resolveSelectOffset.
  • orderByID: if true the result is ordered by the table ID column, automatically resolved from the table scheme (TableScheme.idFieldName) or from EntityHandler.idFieldName. Defaults to true when offset is defined, since a paginated select needs a stable order to be correct. Pass false to opt out.
  • orderDirection: the OrderDirection of the ordering, OrderDirection.ascending by default. Ignored while the ordering is not active (see orderByID).

Note that a query over a to-many relationship generates a JOIN without a DISTINCT, so it can return the same entity more than once. Paginating such a query is best-effort.

Implementation

@override
FutureOr<Iterable<O>> selectByQuery(
  String query, {
  Object? parameters,
  List? positionalParameters,
  Map<String, Object?>? namedParameters,
  Transaction? transaction,
  int? limit,
  int? offset,
  int? page,
  bool? orderByID,
  OrderDirection? orderDirection,
  EntityResolutionRules? resolutionRules,
}) {
  checkNotClosed();

  var condition = _parseCache.parseQuery(query);

  return select(
    condition,
    parameters: parameters,
    positionalParameters: positionalParameters,
    namedParameters: namedParameters,
    transaction: transaction,
    limit: limit,
    offset: resolveSelectOffset(page: page, offset: offset, limit: limit),
    orderByID: orderByID,
    orderDirection: orderDirection,
    resolutionRules: resolutionRules,
  );
}