如何基于v-for值在模态窗口（单击按钮）上获取所选数据？

Question

I am new to Vue and am using the Bootstrap modals to display product information. I have grid containers that each have a product picture, description, and two buttons. One of the buttons( More details >> ), when clicked, would shoot a modal window that should show the very same product description and picture of the grid it was contained in.

<div id="myapp">
  <h1> {{ allRecords() }} </h1>
  <div class="wrapper" >
    <div class="grid-container" v-for="product in products" v-bind:key="product.ID">
      <div class="Area-1">
        <img class="product_image" src="https:....single_product.jpg"> 
      </div>
      <div class="Area-2">
        <div class = "amount">
          {{ product.amount }}
        </div>
        {{ product.Description }}
      </div>
      <div class="Area-3">
        <b-button size="sm" v-b-modal="'myModal'" product_item = "'product'">
          More Details >>
        </b-button>
        <b-modal id="myModal" >
          <h1> {{ product.Name }} </h1>
          <h3> {{ product.Description }} </h3>
        </b-modal>
      </div>
      <div class="Area-4">
        <br><button>Buy</button>
      </div>
    </div>
  </div>
</div>

var app = new Vue({
  'el': '#myapp',
  data: {
    products: "",
    productID: 0
  },
  methods: {
    allRecords: function(){
      axios.get('ajaxfile.php')
        .then(function (response) {
          app.products = response.data;
        })
        .catch(function (error) {
          console.log(error);
        });
    },
  }
})

Area 1, 2 and 4 work perfectly fine and they display the product data according to the v-for value and as expected respectively for each grid container. Area 3 is a problem here when I click the More details >> button, I just see a faded black screen. I am not sure what I am doing wrong here, would really appreciate some help.

Answer 1

Add a property selectedProduct, then on More Details button click event, assign the current product to the selectedProduct member as below :

HTML

  <div class="Area-3">
    <b-button size="sm" v-b-modal="'myModal'" 
             @click="selectProduct(product)">More Details >> </b-button>    
    <b-modal id="myModal">
             <h1> {{ this.selectedProduct.Name }} </h1>
             <h3> {{ this.selectedProduct.Description }} </h3>
    </b-modal>
  </div>

Javascript:

var app = new Vue({
 'el': '#myapp',
 data: {
    products: "",
    productID: 0,
    selectedProduct: {Name: '', Description: '', Amount:0}
 },
 methods: {
   allRecords: function(){
   ...
   },
   selectProduct: function(product)
   {
       this.selectedProduct = product;
   }
   ...
 }

Answer 2

The reason you're just seeing a black screen is because you're not giving the b-modal in your v-for a unique ID. So when you click the button it's actually opening all the modals at the same time, and stacking the backdrop making it look very dark.

Instead you could use your product ID (I'm guessing it's unique) in your modal ID to make it unique

<div id="myapp">
  <h1> {{ allRecords() }} </h1>
  <div class="wrapper" >
    <div class="grid-container" v-for="product in products" v-bind:key="product.ID">
      <div class="Area-1">
        <img class="product_image" src="https:....single_product.jpg"> 
      </div>
      <div class="Area-2"><div class = "amount">{{ product.amount }} </div>
        {{ product.Description }}
      </div>
      <div class="Area-3">
        <b-button size="sm" v-b-modal="`myModal-${product.ID}`" product_item = "'product'">
          More Details >> 
        </b-button>
        <b-modal :id="`myModal-${product.ID}`" >
          <h1> {{ product.Name }} </h1>
          <h3> {{ product.Description }} </h3>
        </b-modal>
      </div>
      <div class="Area-4">
        <br><button>Buy</button>
      </div>
    </div>
  </div>
</div>

Example pen: https://codepen.io/Hiws/pen/qBWJjOZ?editors=1010

Answer 3

I can't replicate the issue. I created JSFiddle to test:

https://jsfiddle.net/4289wh0e/1/

However, I realized multiple modal elements are displayed when I click on the "More Details" button.

I suggest you add only one modal in the wrapper and store the chosen product in a data variable.

https://jsfiddle.net/4289wh0e/2/

<div id="myapp">
    <h1> {{ allRecords() }} </h1>

    <div class="wrapper">

        <div class="grid-container" v-for="product in products" v-bind:key="product.ID">

            <div class="Area-1"><img class="product_image" src="https:....single_product.jpg"> </div>

            <div class="Area-2">
                <div class="amount">{{ product.amount }} </div>
                {{ product.Description }}</div>

            <div class="Area-3">
                <b-button size="sm" v-b-modal="'productModal'" @click="chooseProduct(product)" product_item="'product'">More Details >> </b-button>

            </div>

            <div class="Area-4">
                <br>
                <button>Buy</button>
            </div>
        </div>

        <b-modal id="productModal" v-if="chosenProduct">
            <h1> {{ chosenProduct.Name }} </h1>
            <h3> {{ chosenProduct.Description }} </h3>
        </b-modal>
    </div>
</div>

Vue.use(BootstrapVue)

var app = new Vue({
    'el': '#myapp',
    data: {
        products: [],
        chosenProduct: null
    },
    methods: {
            chooseProduct: function (product) {
            this.chosenProduct = product
        },
        allRecords: function(){
                    this.products = [
            {
                ID: 1,
                Description: 'dek',
              Name: 'Name',
              amount: 100
            },
            {
                ID: 2,
                Description: 'dek 2',
              Name: 'Name 2',
              amount: 300
            }
          ]
        },
    }
})