How do you update a django template context variable after an AJAX call?

问题

I have a table Product that shows information of a group of products.

    <table id="item_table" class="table table-sm table-hover table-bordered">
        <thead class="thead-inverse">
        <tr>
            <th colspan="2">Date</th>
            <th colspan="6">Product name</th>
            <th colspan="2">Category</th>
            <th colspan="2">Amount</th>
        </tr>
        </thead>
        <tbody>
            {% for item in product_list %}
            <tr>
                <td colspan="2">{{ item.date }}</td>
                <td id="item_name_format" colspan="6">{{ item.name }}</td>
                {% if item.category_id %}
                <td id="item_name_format" colspan="2">{{ item.category_id.level1_desc }}</td>
                {% endif %}
                <td id="item_amt_format" colspan="2">${{ item.amount|intcomma }}</td>
            </tr>
            {% endfor %}
        </tbody>
    </table>

I am using the below Ajax call you update the table.

$(document).ready(function(){

// Submit post on submit
$('.item_num').on('click', function(event){
    event.preventDefault();
    var item_num = $(this).attr('id');
    update_item(item_num);
});

function update_item(item_num) {
    console.log(item_num) // sanity check
    $.ajax({
        type: 'GET',
        url:'update_items', 
        data: { 'item_num': item_num },

        success: function(result){
            console.log(result);
            ???$('item_table').product_list = result;???
        },
... more code

How do I update the variable product_list with 'result' from my Ajax call?

This should update the table right?

Thanks

回答1:

you cannot this way. Better way would be to load that part of your html via ajax.

your ajax view:

def update_items(request):
    product_list = your_data
    return render(request, 'table_body.html', {'product_list':product_list})

your main html:

<tbody class="table_body">
   {% include 'table_body.html' %}
</tbody>

table_body.html:

{% for item in product_list %}
  <tr>
     <td colspan="2">{{ item.date }}</td>
     <td id="item_name_format" colspan="6">{{ item.name }}</td>
     {% if item.category_id %}
      <td id="item_name_format" colspan="2">{{ item.category_id.level1_desc }}</td>
     {% endif %}
      <td id="item_amt_format" colspan="2">${{ item.amount|intcomma }}</td>
  </tr>
{% endfor %}

your ajax would look like this:

function update_item(item_num) {
    console.log(item_num) // sanity check
    $('.table_body').html('').load(
        "{% url 'update_items' %}?item_num=" + item_num
    ); // <--- this code instead of $.ajax(lala)

you use this load() here

来源：https://stackoverflow.com/questions/35166013/how-do-you-update-a-django-template-context-variable-after-an-ajax-call