Safely retrieve data from session reactive values — get_session_data

Safely retrieves a column or variable from a named table stored in session reactive values, returning a fallback value if the table or variable is not available.

Usage

get_session_data_safe(
  session,
  table_name,
  variable_name,
  fallback_value = "Unknown"
)

Arguments

session: Shiny session object containing userData$reactiveValues
table_name: Character string: name of the table in reactiveValues
variable_name: Character string: name of the variable/column to retrieve
fallback_value: Character string: value to return if conditions not met (default: "Unknown")

Value

Value from the specified table/variable if available, fallback_value otherwise

Examples

if (FALSE) { # \dontrun{
  # session is the Shiny session object from the module server function
  site_codes <- get_session_data_safe(session, "sitesData", "SITE_CODE")
  entered_by <- get_session_data_safe(session, "campaignData", "ENTERED_BY",
                                      fallback_value = "Unknown user")
} # }