小编kan*_*n k的帖子

我正在使用 mongolite 包从 MongoDB 连接和检索数据。 如何在 mongolite 查找查询中传递值

##connecting mongodb

library(mongolite)

mongo<-mongolite::mongo(collection = "Sample", db = "Test", url = 
                          "mongodb://User:123@Wyyuyu:13333/ty2_U",verbose = TRUE)

## getting all data from collection data from collection below query is working fine.

values <- mongo$find()

## But I want to filter specific value by passing value.

 for(i in c("process","check","queue"))
{    

   values <- mongo$find('{"field" : i}',)
}

如果我尝试上面的代码，我会遇到以下问题。请帮我解决

Error: Invalid JSON object: {"field" : i}

我有一个称为df的数据框，我需要使用filter（）。pls检查从数据框中过滤数据

我的数据框

Queue   project._id   project.ProjectName    project.Status  project.CreatedBy  project.Createdtime     X.gender

first     111              Travel                1               manchi         2017-04-24 18:50:27       male

last      111              2334                  1               mono             2017-04-24 18:50:27      Female

first     111              556                  1               gunal            2017-04-24 18:50:27       male

first     7888            classical             1               manchi            2017-04-24 18:50:27      Female

我尝试使用dplyr通过以下代码过滤数据。

Finalfilter<-df%>% 
   filter(project.ProjectName == "Travel",Queue=="first")%>%
    select(X.gender.)

我的预期结果是

Queue   project._id   project.ProjectName    project.Status  project.CreatedBy  project.Createdtime     X.gender

first     111              Travel                1               manchi         2017-04-24 18:50:27       male

first     111              556                  1               gunal            2017-04-24 18:50:27       male

但是我低于错误，请帮助我解决此问题。

错误：列project必须是一维原子向量或列表

dput。

structure(list(Queue = c("first", "last", …