Encountering an issue of duplicate key error when using multiple v-for loops with various keys

I've encountered an issue while working on a Python application that utilizes Vue.js. A ticket came my way with an error message stating:

[Vue warn]: Duplicate keys detected: ''. This may cause an update error. (found in Root)

The problem is, all the keys in the v-for: loops are unique and do not repeat.

Here are some examples of how the keys are structured:

<li class="page-item" v-for="p in pagesArray" :key="p.label+'label'">...

<b-form-checkbox v-for="(skill, index) in visibleSkills" :key="skill.skillname+'-name'">...

<b-form-radio v-for="(bundle, index) in visibleBundles" :key="bundle.bundlename">...

If anyone has any insights on this issue, it would be greatly appreciated. The stack trace isn't providing much help, and I have already gone through all the documentation available.

javascriptvue.jsvuejs2

Answer №1

To ensure uniqueness, it is recommended to concatenate the index with the label:

  <li class="page-item" v-for="(p,index) in pagesArray" :key="p.label+'label'+index">
  <b-form-checkbox v-for="(skill, index) in visibleSkills" :key="skill.skillname+'-name'+index">
  <b-form-radio v-for="(bundle, index) in visibleBundles" :key="bundle.bundlename+index">

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