如何在GoogleApis Places中添加字段掩码

Question

import 'package:googleapis/places/v1.dart';
import 'package:googleapis_auth/googleapis_auth.dart';
final http.Client client = clientViaApiKey(apikey);


final PlacesApi places = PlacesApi(client);

GoogleMapsPlacesV1SearchTextResponse res = await places.places.searchText(
        GoogleMapsPlacesV1SearchTextRequest(
          textQuery: "mcDonals Near Me",
          maxResultCount: 10,
          locationRestriction:
              GoogleMapsPlacesV1SearchTextRequestLocationRestriction.fromJson({
            "circle": {
              "center": {"latitude": 37.7937, "longitude": -122.3965},
              "radius": 500.0
            }
          }),
        ),
      );

这是我上面的代码！ 错误：

DetailedApiRequestError(status: 400, message: FieldMask 是必需参数。有关如何提供它的信息，请参阅 https://cloud.google.com/apis/docs/system-parameters。作为示例，您可以设置标头'X-Goog-FieldMask' 值为 'places.displayName'，'places.id' 询问地点的显示名称和地点 id 您也可以在手动测试中将值设置为 '*' 以获取所有。可用的响应字段。

Answer 1

您需要添加

$fields

参数（是的，它有一个 $）。通常，您可以将其添加为标题 https://developers.google.com/maps/documentation/places/web-service/text-search

-H 'X-Goog-FieldMask: places.displayName,places.formattedAddress,places.priceLevel'

但是您也可以将其添加为查询参数：

    final fields = "places.id,places.displayName,places.formattedAddress,places.location";

    GoogleMapsPlacesV1SearchTextResponse res = await places.places.searchText(
        myGoogleMapsPlacesV1SearchTextRequest, $fields: fields);    

    // you can get all the fields with '*'
    res = await places.places.searchText(
        myGoogleMapsPlacesV1SearchTextRequest, $fields: '*');    

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