Partial submit

[Jack McCush]

I have an App that allows some business users to preform what if analysis. Once they have adjusted some inputs I would like to have a button that only executes part of the server.R. For example lets say they are doing some analysis of the optimal inventory at a store after adjusting the inputs the App predicts what the optimal inventory should be set at. I would like to write this value to a database. I could have a submit button that execute the whole srever.R, but every time they submit and look at a new scenario the result is written to the database. Any ideas? 

[Joe Cheng]

Yes, we have a solution for this. You'll need to install the shiny-incubator package.

# Install devtools package if needed

install.packages("devtools")

devtools::install_github("shiny-incubator", "rstudio")

In your ui.R, include an actionButton("save", "Save"). This will create an input whose value starts at 0, and increases by 1 each time the button is clicked.

Then in server.R, include a chunk of code like this:

observe({

  if (input$save == 0)

    return()

  isolate({

    # Read inputs and save values to database here

  })

})

The "observe" function is how you create an observer, which is described in Reactivity Overview. The "isolate" function is described in Isolation.

On Mon, Apr 1, 2013 at 8:46 AM, Jack McCush <mccus...@gmail.com> wrote:

I have an App that allows some business users to preform what if analysis. Once they have adjusted some inputs I would like to have a button that only executes part of the server.R. For example lets say they are doing some analysis of the optimal inventory at a store after adjusting the inputs the App predicts what the optimal inventory should be set at. I would like to write this value to a database. I could have a submit button that execute the whole srever.R, but every time they submit and look at a new scenario the result is written to the database. Any ideas? 

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[a.vanh...@gmail.com]

Hi,

I installed the devtools. Then i tried to execute the second line: devtools::install_github("shiny-incubator", "rstudio")

However, I get an error telling me i have a ssl certificate problem:

> devtools::install_github("shiny-incubator", "rstudio")

Installing github repo(s) shiny-incubator/master from rstudio

Installing shiny-incubator.zip from https://github.com/rstudio/shiny-incubator/archive/master.zip

Error in function (type, msg, asError = TRUE)  : 

  SSL certificate problem, verify that the CA cert is OK. Details:

error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed

Someone a clue to solve this?

tnx.

Op maandag 1 april 2013 18:04:22 UTC+2 schreef Joe Cheng [RStudio] het volgende:

[Scott Chamberlain]

The actionButton function is in the latest version (v0.6.0) of Shiny. 

Scott