Using Vue JS to create advanced select dropdowns

In the process of developing an application that relies on dropdown menus to assign input fields from a CSV file, I encountered a challenge. I wanted to incorporate logic that would automatically select certain options based on specific conditions. However, while attempting to implement this logic, I ran into an issue with the error message: "Interpolation inside attributes has been removed. Use v-bind or the colon shorthand instead."

<option value="first name" selected="{{ (field == 'First Name' || field == 'Given Name') ? true : false }}">First name</option>

The reason for not opting for :value="field" or v-model="field" is twofold. Firstly, I need to account for multiple synonyms for certain fields, such as "Date of Birth, DOB, Birth date." Secondly, there are instances where none of the header rows match any specific field, in which case I want to default to a catch-all option like "Not Mapped".

Various attempts were made:

<option value="first name" :selected="true : field == 'First Name' || field == 'Given Name'">First Name</option>

However, this approach consistently selects the option regardless of the actual condition, even when the field is something like "Date of Birth".

Do you have any suggestions?

EDIT:

A workaround I devised involved creating a function to determine the option value:

<select class="form-select" name="f{index}" :value="mapFieldName(field)">

mapFieldName: function (colName) {

    // Default return value
    var fieldName = "not mapped";

    // Convert to lowercase for case-insensitive matching
    colName = colName.toLowerCase();

    // Match first name field
    if (colName == "first name" || colName == "given name" || colName == "first" || colName == "fn")
        fieldName = "first name";

    // Return computed option value
    return fieldName;           
}

Unless a more elegant solution arises, I will proceed with this method.

Answer №1

Utilizing v-bind with a method is the ideal solution for this scenario.

Past responses have touched on similar ideas, however, I believe that combining v-bind and a method will deliver precisely what you are seeking.

Although this is a concise example, I hope it clarifies my suggestion:

<template>
  <div>
    <select class="form-select" :value="selectedFieldName">
      <option v-for="(item, index) in csvCollection" :key="index" :selected="isOptionSelected" @click="selectedFieldName = item.fieldName">{{ item.fieldName }}</option>
    </select>
  </div>
</template>

<script>
  export default {
    data() {
      return {
        selectedFieldName: '',
        csvCollection: []
      }
    },
    methods: {
      isOptionSelected(item) {
        if (item.fieldName.toLower() === "first name" || "given name") {
          return true;
        }
        item.fieldName = "Not Mapped";
        return false;
      }
    }
  }
</script>

Answer №2

If you're looking to apply bindings, v-bind is a great option

<option value="first name" v-bind="getSelected('first name','given name')">First name</option> 

Next step would be adding the following function in your script:

methods:{
 getSelected(v1, v2){
  if(v1==this.field || v2==this.field){
   return {
    selected:true
   }
 }
}

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