Helm chart not picking up correct values - kubernetes

Question

I'm trying to assign static IPs for Load Balancers in GKE to services by storing them in the values.yaml file as:
ip:
sandbox:
service1: xxx.xxx.201.74
service2: xxx.xxx.80.114
dev:
service1: xxx.xxx.249.203
service2: xxx.xxx.197.77
test:
service1: xxx.xxx.123.212
service2: xxx.xxx.194.133
prod:
service1: xxx.xx.244.211
service2: xxx.xxx.207.177
All works fine till I want to deploy to prod and that will fail as:
Error: UPGRADE FAILED: template: chart-v1/templates/service2-service.yaml:24:28: executing "chart-v1/templates/service2-service.yaml" at <.Values.ip.prod.service2>: nil pointer evaluating interface {}.service2
helm.go:94: [debug] template: chart-v1/templates/service2-service.yaml:24:28: executing "chart-v1/templates/service2-service.yaml" at <.Values.ip.prod.service2>: nil pointer evaluating interface {}.service2
and the part for service2-service.yaml looks like:
apiVersion: v1
kind: Service
metadata:
annotations:
appName: {{ include "common.fullname" . }}
componentName: service2
labels:
io.kompose.service: service2
name: service2
spec:
ports:
- name: "{{ .Values.service.service2.ports.name }}"
port: {{ .Values.service.service2.ports.port }}
protocol: {{ .Values.service.service2.ports.protocol }}
targetPort: {{ .Values.service.service2.ports.port }}
type: LoadBalancer
{{ if eq .Values.target.deployment.namespace "sandbox" }}
loadBalancerIP: {{ .Values.ip.sandbox.service2 }}
{{ else if eq .Values.target.deployment.namespace "dev" }}
loadBalancerIP: {{ .Values.ip.dev.service2 }}
{{ else if eq .Values.target.deployment.namespace "test" }}
loadBalancerIP: {{ .Values.ip.test.service2 }}
{{ else if eq .Values.target.deployment.namespace "prod" }}
loadBalancerIP: {{ .Values.ip.prod.service2 }}
{{ else }}
{{ end }}
selector:
io.kompose.service: service2
status:
loadBalancer: {}
Any clue why is complaining that is nil (empty)?

Answer 1

it could be due to the function changing the context and defined in values.yaml
Normally with range, we can use the $ for global scope, appName: {{ include "common.fullname" $ }}
When tested the same template by keeping the static value of the appName it worked for me, so there is no issue with access from values.yaml unless nil is getting set at .Values.ip.prod.service2.
in other case as you mentioned {{ (.Values.ip.prod).service2 }} multiple level nesting will solve issue.