encodeConditionValuesWithOperator method

FutureOr<EncodingContext> encodeConditionValuesWithOperator(EncodingContext context, Type keyType, String? fieldKey, String tableKey, String operator, dynamic values, bool valueAsList,)

Implementation

FutureOr<EncodingContext> encodeConditionValuesWithOperator(
  EncodingContext context,
  Type keyType,
  String? fieldKey,
  String tableKey,
  String operator,
  dynamic values,
  bool valueAsList,
) {
  context.write(' ');
  context.write(tableKey);
  context.write(' ');

  // The encoding value rather than only its text: a null supplied as a
  // parameter encodes to a placeholder, so the text alone cannot say whether
  // the comparison is against null.
  var valueRet = valueToParameterValue(
    context,
    values,
    fieldKey: fieldKey,
    fieldType: keyType,
    valueAsList: valueAsList,
  );

  return valueRet.resolveMapped((value) {
    if (isNullEncodingValue(value, context)) {
      switch (operator) {
        case '=':
        case 'IN':
          {
            context.write('IS NULL ');
            _markPlaceholderInlinedAsNull(value, context);
            return context;
          }
        case '!=':
        case 'NOT IN':
          {
            context.write('IS NOT NULL ');
            _markPlaceholderInlinedAsNull(value, context);
            return context;
          }
      }
    }

    context.write(operator);
    context.write(' ');
    context.write(value.encode);
    context.write(' ');
    return context;
  });
}