equalTo method
Create a query constrained to only return child nodes with the given
value
(and key
, if provided).
If a key is provided, there is at most one such child as names are unique.
Implementation
Query equalTo(dynamic value, {String key}) {
assert(!_parameters.containsKey('equalTo'));
assert(value is String ||
value is bool ||
value is double ||
value is int ||
value == null);
final Map<String, dynamic> parameters = <String, dynamic>{'equalTo': value};
if (key != null) parameters['equalToKey'] = key;
return _copyWithParameters(parameters);
}