[解決済み] B-tableのBootstrapVue条件列

new Vue({
  el: '#app',
  computed: {
    computedFields() {
      // If the user isn't an admin, filter out fields that require auth.
      if(!this.isUserAdmin)
        return this.fields.filter(field => !field.requiresAdmin);
        
      // If the user IS an admin, return all fields.
      else
        return this.fields;
    }
  },
  data() {
      return {
        isUserAdmin: false,
        fields: [
          { key: 'first', label: 'First Name' },
          { key: 'last', label: 'Last Name' },
          { key: 'age', label: 'Age' },
          { key: 'sex', label: 'Sex' },
          { key: 'secretActions', label: 'Secret Actions', requiresAdmin: true },
        ],
        items: [
          { first: 'John', last: 'Doe', sex: 'Male', age: 42 },
          { first: 'Jane', last: 'Doe', sex: 'Female', age: 36 },
          { first: 'Rubin', last: 'Kincade', sex: 'Male', age: 73 },
          { first: 'Shirley', last: 'Partridge', sex: 'Female', age: 62 }
        ]
      }
    }
})

<link href="https://unpkg.com/[email protected]/dist/css/bootstrap.min.css" rel="stylesheet"/>
<link href="https://unpkg.com/[email protected]/dist/bootstrap-vue.css" rel="stylesheet"/>

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.6.10/vue.js"></script>
<script src="https://unpkg.com/[email protected]/dist/bootstrap-vue.js"></script>

<div id="app" class="p-3">
  <b-btn @click="isUserAdmin = !isUserAdmin">
    Toggle admin user ({{ isUserAdmin }})
  </b-btn>
  <br /><br />
  <b-table :fields="computedFields" :items="items">
    <template v-slot:cell(secretActions)>
      <b-btn>Edit User</b-btn>
      <b-btn>Delete User</b-btn>
    </template>
  </b-table>
</div>