我看到StringValue是字符串消息的消息包装器，我尝试在其中使用：
> dput(D2[c(8,9,10)])
structure(list(flightStatuses = structure(list(flightId = 890465980L,
carrierFsCode = "6L", flightNumber = "406", departureAirportFsCode = "YUB",
arrivalAirportFsCode = "YEV", departureDate = structure(list(
dateLocal = "2017-05-12T18:00:00.000", dateUtc = "2017-05-13T00:00:00.000Z"), .Names = c("dateLocal",
"dateUtc"), class = "data.frame", row.names = 1L), arrivalDate = structure(list(
dateLocal = "2017-05-12T18:30:00.000", dateUtc = "2017-05-13T00:30:00.000Z"), .Names = c("dateLocal",
"dateUtc"), class = "data.frame", row.names = 1L), status = "U",
schedule = structure(list(flightType = "J", serviceClasses = "Y",
restrictions = ""), .Names = c("flightType", "serviceClasses",
"restrictions"), class = "data.frame", row.names = 1L), operationalTimes = structure(list(
publishedDeparture = structure(list(dateLocal = "2017-05-12T18:00:00.000",
dateUtc = "2017-05-13T00:00:00.000Z"), .Names = c("dateLocal",
"dateUtc"), class = "data.frame", row.names = 1L), publishedArrival = structure(list(
dateLocal = "2017-05-12T18:30:00.000", dateUtc = "2017-05-13T00:30:00.000Z"), .Names = c("dateLocal",
"dateUtc"), class = "data.frame", row.names = 1L), scheduledGateDeparture = structure(list(
dateLocal = "2017-05-12T18:00:00.000", dateUtc = "2017-05-13T00:00:00.000Z"), .Names = c("dateLocal",
"dateUtc"), class = "data.frame", row.names = 1L), flightPlanPlannedDeparture = structure(list(
dateLocal = "2017-05-12T18:16:00.000", dateUtc = "2017-05-13T00:16:00.000Z"), .Names = c("dateLocal",
"dateUtc"), class = "data.frame", row.names = 1L), scheduledGateArrival = structure(list(
dateLocal = "2017-05-12T18:30:00.000", dateUtc = "2017-05-13T00:30:00.000Z"), .Names = c("dateLocal",
"dateUtc"), class = "data.frame", row.names = 1L), flightPlanPlannedArrival = structure(list(
dateLocal = "2017-05-12T18:42:00.000", dateUtc = "2017-05-13T00:42:00.000Z"), .Names = c("dateLocal",
"dateUtc"), class = "data.frame", row.names = 1L)), .Names = c("publishedDeparture",
"publishedArrival", "scheduledGateDeparture", "flightPlanPlannedDeparture",
"scheduledGateArrival", "flightPlanPlannedArrival"), class = "data.frame", row.names = 1L),
flightDurations = structure(list(scheduledBlockMinutes = 30L,
scheduledAirMinutes = 26L, scheduledTaxiOutMinutes = 16L), .Names = c("scheduledBlockMinutes",
"scheduledAirMinutes", "scheduledTaxiOutMinutes"), class = "data.frame", row.names = 1L),
flightEquipment = structure(list(scheduledEquipmentIataCode = "DHT",
actualEquipmentIataCode = "DHT"), .Names = c("scheduledEquipmentIataCode",
"actualEquipmentIataCode"), class = "data.frame", row.names = 1L)), .Names = c("flightId",
"carrierFsCode", "flightNumber", "departureAirportFsCode", "arrivalAirportFsCode",
"departureDate", "arrivalDate", "status", "schedule", "operationalTimes",
"flightDurations", "flightEquipment"), class = "data.frame", row.names = 1L),
flightStatuses = list(), flightStatuses = structure(list(
flightId = c(892402226L, 891883063L), carrierFsCode = c("4K",
"6L"), flightNumber = c("201", "402"), departureAirportFsCode = c("YUB",
"YUB"), arrivalAirportFsCode = c("YEV", "YEV"), departureDate = structure(list(
dateLocal = c("2017-05-13T09:30:00.000", "2017-05-13T10:30:00.000"
), dateUtc = c("2017-05-13T15:30:00.000Z", "2017-05-13T16:30:00.000Z"
)), .Names = c("dateLocal", "dateUtc"), class = "data.frame", row.names = 1:2),
arrivalDate = structure(list(dateLocal = c("2017-05-13T11:42:00.000",
"2017-05-13T11:10:00.000"), dateUtc = c("2017-05-13T17:42:00.000Z",
"2017-05-13T17:10:00.000Z")), .Names = c("dateLocal",
"dateUtc"), class = "data.frame", row.names = 1:2), status = c("U",
"U"), operationalTimes = structure(list(scheduledGateDeparture = structure(list(
dateLocal = c("2017-05-13T09:30:00.000", "2017-05-13T10:30:00.000"
), dateUtc = c("2017-05-13T15:30:00.000Z", "2017-05-13T16:30:00.000Z"
)), .Names = c("dateLocal", "dateUtc"), class = "data.frame", row.names = 1:2),
estimatedRunwayDeparture = structure(list(dateLocal = c("2017-05-13T11:19:00.000",
NA), dateUtc = c("2017-05-13T17:19:00.000Z", NA)), .Names = c("dateLocal",
"dateUtc"), class = "data.frame", row.names = 1:2),
actualRunwayDeparture = structure(list(dateLocal = c("2017-05-13T11:19:00.000",
NA), dateUtc = c("2017-05-13T17:19:00.000Z", NA)), .Names = c("dateLocal",
"dateUtc"), class = "data.frame", row.names = 1:2),
estimatedRunwayArrival = structure(list(dateLocal = c("2017-05-13T11:42:00.000",
NA), dateUtc = c("2017-05-13T17:42:00.000Z", NA)), .Names = c("dateLocal",
"dateUtc"), class = "data.frame", row.names = 1:2),
flightPlanPlannedDeparture = structure(list(dateLocal = c(NA,
"2017-05-13T10:45:00.000"), dateUtc = c(NA, "2017-05-13T16:45:00.000Z"
)), .Names = c("dateLocal", "dateUtc"), class = "data.frame", row.names = 1:2),
flightPlanPlannedArrival = structure(list(dateLocal = c(NA,
"2017-05-13T11:10:00.000"), dateUtc = c(NA, "2017-05-13T17:10:00.000Z"
)), .Names = c("dateLocal", "dateUtc"), class = "data.frame", row.names = 1:2)), .Names = c("scheduledGateDeparture",
"estimatedRunwayDeparture", "actualRunwayDeparture",
"estimatedRunwayArrival", "flightPlanPlannedDeparture",
"flightPlanPlannedArrival"), class = "data.frame", row.names = 1:2),
flightEquipment = structure(list(actualEquipmentIataCode = c("BE2",
"DHT")), .Names = "actualEquipmentIataCode", class = "data.frame", row.names = 1:2),
flightDurations = structure(list(scheduledAirMinutes = c(NA,
25L), scheduledTaxiOutMinutes = c(NA, 15L)), .Names = c("scheduledAirMinutes",
"scheduledTaxiOutMinutes"), class = "data.frame", row.names = 1:2)), .Names = c("flightId",
"carrierFsCode", "flightNumber", "departureAirportFsCode",
"arrivalAirportFsCode", "departureDate", "arrivalDate", "status",
"operationalTimes", "flightEquipment", "flightDurations"), class = "data.frame", row.names = 1:2)), .Names = c("flightStatuses",
"flightStatuses", "flightStatuses"))
但是，我收到来自protoc的消息：
somefile.proto:30:14：＆＃34; StringValue＆＃34;没有定义。
我使用的是proto3语法。我错过了什么？
答案 0 :(得分：2)
行。
我需要：import "google/protobuf/wrappers.proto";
并使用完全限定的google.protobuf.StringValue