What is the best way to implement validation for individual elements within an array that are being displayed on a webpage using a for loop?

Currently, I am utilizing Vue JS within the Vuetify framework to build a dynamic form:

    <v-text-field 
        v-for="items in itemsArray"
        :key="items.id"
        v-model="items.data"
        :label="items.name"
    ></v-text-field>

This is an example structure of my itemsArray:

    data: () => ({
        itemsArray: [
            {id: 6, name: 'Name'},
            {id: 1, name: 'Email'},
            {id: 17, name: 'Age'},
            {id: 3, name: 'Height'},
            {id: 4, name: 'Contact Number'},
        ],
    }),

I am seeking guidance on how to implement validation for specific items within this array. For instance, I need to enforce a character limit of 8 and restrict input to only numbers for the item with id: 4 and name 'Contact Number'.

Although I have reviewed the Vuetify documentation, it does not provide clear instructions on how to validate items rendered dynamically through a loop.

Answer №1

One way to ensure validation for the item you want is by adding specific rules:

 itemsArray: [
            {id: 6, name: 'Name'},
            {id: 1, name: 'Email'},
            {id: 17, name: 'Age'},
            {id: 3, name: 'Height'},
            {id: 4, name: 'Contact Number', rules:{required: value => !!value || 'Required.', counter: value => value.length <= 8 || 'Max 8 characters'}},
        ]

When implementing in the template:

  <v-text-field 
        v-for="items in itemsArray"
        :key="items.id"
        v-model="items.data"
        :label="items.name"

:rules='items.rules?Object.values(items.rules):[]'

    ></v-text-field>

For a visual representation and further testing, visit this link

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