使用闪亮的用户身份验证方法子集数据帧

下面我有一个闪亮的应用程序,它使用用户身份验证逻辑。如您所见,首先创建一个数据帧时使用:

# dataframe that holds usernames, passwords and other user data
user_base <- data.frame(
  user = c("user1", "user2","user1"),
  password = c("pass1", "pass2","pass1"), 
  permissions = c("admin", "standard","admin"),
  name = c("User One", "User Two","User One"),
  stringsAsFactors = FALSE)

从这个数据框中,用户使用 user password 以获取登录应用程序的密码。如你所见,我可以登录到应用程序中,只使用 user2 凭据为 user1 user_base 基于用户名和密码,我将使用,但现在我可以看到,如果我有多行与相同的用户名,这不起作用。另外一个问题是,如果可以跳过密码,让用户只使用用户名登录。

library(shiny)
library(shinyauthr)
library(shinyjs)

# dataframe that holds usernames, passwords and other user data
user_base <- data.frame(
  user = c("user1", "user2","user1"),
  password = c("pass1", "pass2","pass1"), 
  permissions = c("admin", "standard","admin"),
  name = c("User One", "User Two","User One"),
  stringsAsFactors = FALSE)

ui <- fluidPage(
  # must turn shinyjs on
  shinyjs::useShinyjs(),
  # add logout button UI 
  div(class = "pull-right", shinyauthr::logoutUI(id = "logout")),
  # add login panel UI function
  shinyauthr::loginUI(id = "login"),
  # setup table output to show user info after login
  tableOutput("user_table")
)

server <- function(input, output, session) {

  # call the logout module with reactive trigger to hide/show
  logout_init <- callModule(shinyauthr::logout, 
                            id = "logout", 
                            active = reactive(credentials()$user_auth))

  # call login module supplying data frame, user and password cols
  # and reactive trigger
  credentials <- callModule(shinyauthr::login, 
                            id = "login", 
                            data = user_base,
                            user_col = user,
                            pwd_col = password,
                            log_out = reactive(logout_init()))

  # pulls out the user information returned from login module
  user_data <- reactive({credentials()$info})

  output$user_table <- renderTable({
    # use req to only render results when credentials()$user_auth is TRUE
    req(credentials()$user_auth)
    user_data()
  })
}

shinyApp(ui = ui, server = server)