How to access nested object value

support
1

Hello,

I’m trying to iterate over the target variable, to display the values in a partial template. The template only needs information from the given context.

Here is the simplified structure of my frontmatter :

title: "Title of the page"
formationSection:
  - name: "Formation 1"
    image: "/images/formation.png"
    target:
      title: "Who can participate"
      items:
        - "Developers"
        - "Product Owners"
        - "UX Designers"
  - name: "Formation 2"
    image: "/images/formation-2.png"
    target:
      title: "Who can participate"
      items:
        - "Developers"

I pass the corresponding context in my single.html, like so :

<main class="sl-offer">
    {{ with .Params.formationSection }}
        {{- partial "formation-section.html" . -}}
    {{ end }}
</main>

Then, in my formation-section.html I’m able to display first level variables, like name and image :

<section class="formation">
    <div class="tabs">
            <ul class="tabs__selectors">
                {{ range . }}
                    <li>
                        <button type="button">{{- .name -}}</button> <!-- prints correctly the name -->
                    </li>
                {{ end }}
            </ul>
        <div class="tabs__content">
                {{ range . }}
                    <div class="tab">
                        {{ .target.title }}
                        <ul>
                            {{ range .target.items }}
                                <li> {{ . }}</li>
                            {{ end }}
                        </ul>
                    </div>
                {{ end }}
        </div>
    </div>
</section>

I’m then confronted to this error : <.target.title>: can't evaluate field title in type interface {} , when I try to access the variables in the target object

What would be the correct syntax ? I tried playing with the context but it didn’t change anything.

Thank you for your help

2

At first glance it appears that the context is lost when trying to access the parameter.

From within the partial try assigning a variable to the parameter like so:
{{- $param := $.Params.formationSection -}}

Then iterate over it with: {{ range $param }}.

3

I put your code at the top of my partial :

{{ $param := $.Params.formationSection }}

{{ range $param }}
    {{ . }}
{{ end }}

But still got the error :

<$.Params.formationSection>: can't evaluate field Params in type []interface {}
4

Can you post a non-simplified version of your front matter?

I am unable to reproduce the problem with the front matter and code that you have posted.

5

Sure, here it is :

Note : Edited to avoid indexation by search engines

6

I still cannot reproduce the problem locally using your data and code. Please post a link to the public repository for your project, or to a repository that demonstrates the problem.

7

Unfortunately I can’t do that, i thank you for your help though. The fact that you can’t reproduce the issue is already a clue for me. I will try some things and update the topic when I find the solution.

Just to be clear, should it work with this syntax from my original post ? : {{ .target.title }}

8

Your original syntax produces the expected results. No errors.

1 Like
9

Mystery solved : another markdown (translated version) didn’t have the same structure and some keys were missing.

Thank you all for your time.

10

This topic was automatically closed 2 days after the last reply. New replies are no longer allowed.