Helm configmap error. expected string; got bool

I have a Helm chart with has multiple templates. One is the configmap which was working fine. But when I want to add the enabled part I´m getting the error message.

executing "base-helm-chart/templates/configmap.yaml" at <$config>: wrong type for value; expected string; got bool

This are the files I´m using:

{{- if .Values.configMap.enabled }}
apiVersion: v1
kind: ConfigMap
metadata:
  namespace: {{ .Release.Namespace }}
  name: {{include "chart.fullname" .}}
  labels: {{ include "chart.labels" . | nindent 4 }}
data:
{{- range $name, $config := .Values.configMap }}
  {{ $name }}: |
{{ tpl $config $ | indent 4 }}
  {{- end }}
  {{- end -}}

values.yaml

configMap:
  enabled: true
  config.json: |
    food = pizza
    drink = soda

I want user to enable/disable if he wants to add configmap or not from the values.yaml

Solution

You can add condition to skip value of another type then string to be passed in tpl function

{{- range $name, $config := .Values.configMap -}}
{{ if typeOf $config | eq "string" }}
{{ $name }}: |
{{- tpl $config $ | nindent 12 }}
{{ end }}
{{ end }}
{{ end }}

If you want to also print another key value in output then you can use print, printf, println or any other print option.

{{- range $name, $config := .Values.configMap -}}
{{ if typeOf $config | eq "string" }}
{{ $name }}: |
{{- tpl $config $ | nindent 12 }}
{{- else -}}
{{ printf "%v: %v" $name $config }}
{{ end }}
{{ end }}
{{ end }}