geom_line not plotting when tooltip argument set in ggplotly

Question

I am trying to use plotly for interactive visuals in my shiny app. However, I am running into a problem when trying to add a custom tooltip to the graph. If i set the tooltip argument in ggplotly() then my geom_line() is ignored in my output but the tooltip works.

Here is a MRE:

library(shiny)
library(ggplot2)
library(plotly)
library(tidyquant) #only using the palette_dark() function
library(magrittr)

graph <- data %>%
  ggplot(aes(date, result, text = paste0("Site: ", site, "\n", 
                                     "Quarter: ", quarter, "\n", 
                                     "Year: ", year, "\n", 
                                     "Result: ", result))) +
  facet_wrap(~site) +
  geom_point(color = palette_dark()[1]) +
  geom_line(color = palette_dark()[1]) +
  theme_bw() 

 ggplotly(graph, 
          tooltip = "text")

This gives me this:

If I move the data = and aes() calls from the ggplot call to the individual geoms then The lines still aren't shown:

graph <- ggplot() +
  facet_wrap(~site) +
  geom_point(data = data, 
             aes(date, result, 
                 text = paste0("Site: ", site, "\n", 
                               "Quarter: ", quarter, "\n",
                               "Year: ", year, "\n", 
                               "Result: ", result)),
             color = palette_dark()[1]) +
  geom_line(data = data, 
            aes(date, result, 
                text = paste0("Site: ", site, "\n", 
                              "Quarter: ", quarter, "\n",
                              "Year: ", year, "\n", 
                              "Result: ", result)),
            color = palette_dark()[1]) +
   theme_bw() 

ggplotly(graph, 
     tooltip = "text") 

This gives me the same output with the tooltips still working. However, now I receive two warnings:

Warning: Ignoring unknown aesthetics: text

Warning: Ignoring unknown aesthetics: text

If I remove the text= argument from just the geom_line() function then the lines are plotted but the tooltip no longer works:

Question:

How do I get the custom tooltip to work while still plotting my geom_line()?

My data:

data <- structure(list(site = c("Site 1", "Site 1", "Site 1", "Site 1", 
                                    "Site 2", "Site 2", "Site 2", "Site 2", 
                                    "Site 3", "Site 3", "Site 3", "Site 3", 
                                    "Site 4", "Site 4", "Site 4", "Site 4", 
                                    "Site 5", "Site 5", "Site 5", "Site 5"), 
                           parameter = c("Testing Parameter", "Testing Parameter",
                                         "Testing Parameter", "Testing Parameter", 
                                         "Testing Parameter", "Testing Parameter", 
                                         "Testing Parameter", "Testing Parameter", 
                                         "Testing Parameter", "Testing Parameter", 
                                         "Testing Parameter", "Testing Parameter", 
                                         "Testing Parameter", "Testing Parameter",
                                         "Testing Parameter",  "Testing Parameter", 
                                         "Testing Parameter", "Testing Parameter"),
                           year = c(2016, 2017, 2017, 2017, 2016, 2017, 2017, 2017, 
                                    2016, 2017, 2017, 2017, 2016, 2017, 2017, 2017, 
                                    2016, 2017, 2017, 2017), 
                           quarter = c(4L, 1L, 2L, 3L, 4L, 1L, 2L, 3L, 4L, 1L, 2L, 
                                       3L, 4L, 1L, 2L, 3L, 4L, 1L, 2L, 3L), 
                           result = c(22.87, 31.78, 54.76, 44.3, 27.78, 34.04, 53.27, 
                                      46.83, 19.83, 34.05, 31.18, 35.7,  24.11, 33.57, 
                                      47.5, 40.53, 29.4, 34.6, 53.18, 46.16), 
                           count = c(3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 
                                     3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L), 
                           date = structure(c(17075, 17167, 17257, 17348, 17075, 
                                              17167, 17257, 17348, 17075, 17167, 
                                              17257, 17348, 17075, 17167,  17257, 
                                              17348, 17075, 17167, 17257, 17348), 
                                            class = "Date")), 
                      class = c("tbl_df", "tbl", "data.frame"), 
                      row.names = c(NA, -20L), 
                      .Names = c("site", "parameter", "year", "quarter", "result", 
                                 "count", "date"))

Answer 1

I think the lines weren't showing up because ggplot didn't know which points to connect together. I tried to plot the first graph (without converting to plotly object using ggplotly), & got the following warning:

> graph
geom_path: Each group consists of only one observation. Do you need to adjust the
group aesthetic?

Adding group = site to first set of code worked for me:

library(ggplot2); library(dplyr)

graph <- data %>%
  ggplot(aes(x = date, y = result, 
             text = paste0("Site: ", site, "\n", 
                           "Quarter: ", quarter, "\n", 
                           "Year: ", year, "\n", 
                           "Result: ", result),
             group = site)) +
  facet_wrap(~site) +
  geom_point() + # default palette since I don't have tidyquant
  geom_line() +
  theme_bw()

plotly::ggplotly(graph, tooltip = "text")