param<EntityT, DartType> method

QueryParam<DartType> param<EntityT, DartType>(QueryProperty<EntityT, DartType> prop, { String? alias, })

Allows overwriting a query condition value, making queries reusable.

Example for a property that's used only once in a query (no alias needed):

class App {
  // a reusable query
  late final query = box.query(Person_.name.startsWith('')).build();
}

// later in app code, reuse the query as many times as you want
app.query.param(Person_.name).value = 'A';
final peopleStartingWithA = app.query.find();
app.query.param(Person_.name).value = 'B';
final peopleStartingWithB = app.query.find();

Example for a property used multiple times (requires an alias that is unique for the whole query):

class App {
  // a reusable query
  late final query = box.query(
    Person_.name.startsWith('', alias: 'start') &
    Person_.name.endsWith('', alias: 'end')
  ).build();
}

// later in app code, reuse the query as many times as you want
app.query
  ..param(Person_.name, alias: 'start').value = 'A'
  ..param(Person_.name, alias: 'end').value = 'b';
final people = app.query.find();

Implementation

QueryParam<DartType> param<EntityT, DartType>(
        QueryProperty<EntityT, DartType> prop,
        {String? alias}) =>
    QueryParam._(
        this,
        InternalStoreAccess.entityDef<EntityT>(_store).model.id.id,
        prop,
        alias);