下一页标记R Google Place API

Question

我试图从R中的Google Places API获取餐厅详细信息。我可以成功获得Google提供的20个结果，但是我意识到，随着它返回next_page_token，这意味着那里意味着那里。还有其他结果（合乎逻辑的是，我正在搜索的位置的50公里半径周围有20多家餐厅）。但是，当我使用next_page_token时，它返回NULL。这是我的代码：

install.packages("googleway")
library(googleway)
key <- 'my key'
df_places <- google_places(search_string = "restaurant", 
                       location = c(-33, 151),
                       page_token = "next_page_token",
                       radius = 50000,
                       key = key)
df_places$results$name
df_places$results$rating
df_places$results$formatted_address
df_places$results$geometry$location

，这是没有next_page_token的返回的内容：

 [1] "Gennaro's Italian Restaurant"                   
 [2] "Mount Broke Wines & Restaurant"                 
 [3] "Oak Dairy Bar"                                  
 [4] "Bimbadgen"                                      
 [5] "Subway Restaurant"                              
 [6] "Muse Restaurant"                                
 [7] "Ocean Restaurant"                               

等...

这是用next_page_token返回的：

> df_places$results$name
NULL

只是想知道我做错了什么可以反复返回NULL？

Answer 1

要检查的第一件事，是使用引用的字符串"next_page_token"还是从结果到第一个查询到google_places()

的对象next_page_token

这是您的代码的工作示例

library(googleway)
key <- 'api_key'
df_places <- google_places(search_string = "restaurant", 
                           location = c(-33, 151),
                           radius = 50000,
                           key = key)
token <- df_places$next_page_token
df_next_places <- google_places(search_string = "restaurant", 
                           location = c(-33, 151),
                           page_token = token,
                           radius = 50000,
                           key = key)
df_places$results$name[1:5]
# [1] "Gennaro's Italian Restaurant"   "Mount Broke Wines & Restaurant"
# [3] "Oak Dairy Bar"                  "Bimbadgen"                     
# [5] "Subway Restaurant"
df_next_places$results$name[1:5]
# [1] "RidgeView Restaurant"          "Emerson's Cafe and Restaurant"
# [3] "EXP. Restaurant"               "Margan Restaurant & Winery"   
# [5] "AL-Oi Thai Restaurant"