In decisionpatterns/whisker.tools: Extensions and Enhancements to the 'whisker' package

While whisker supports sections, it does not appear to support sections with non-empty lists as described in https://mustache.github.io/mustache.5.html:

Template:

{{#repo}}
  <b>{{name}}</b>
{{/repo}}

Hash:

{
  "repo": [
    { "name": "resque" },
    { "name": "hub" },
    { "name": "rip" }
  ]
}

Output:

<b>resque</b>
<b>hub</b>
<b>rip</b>

Using JSON

This closely follows the mustache documentation by usingjsonlite to convert the hash to an R object. The R object is a list with a data frame of 3 rows.

library(jsonlite)
library(whisker)

tmpl <- 
  "{{#repo}}
  <b>{{name}}</b>
  {{/name}}"

hash <- 
  '{
    "repo": [
      { "name": "resque" },
      { "name": "hub" },
      { "name": "rip" }
    ]
  }'

data <- fromJSON(hash)  # list of data.frame not list of list


whisker_render(tmpl,data)   

This does not conform to the specification is not correct as in collapses the name column rather than returning three results. According to the specification, I would expect this result:

c("<b>resque</b>","<b>hub</b>","<b>rip</b>")

Using list-of-lists

Using a list of lists does not work either:

data <- list( repo = list( name="resque", name="hub", name="rip") )
whisker_render(tmpl,data) 
# [1] "<b>resque</b>"

decisionpatterns/whisker.tools documentation built on July 1, 2020, 4:18 p.m.