Python 如何在django模板中反向查找m2m字段

你好，我一直在尝试做一个反向m2m查询和计数，但失败了。其他帖子建议的方法似乎不起作用，这是我目前的代码

这是我的HTML中的相关位：

    <table id='myTable' class="display ui celled table" style="width:100%">
        <thead>
            <tr>
                <th>ID</th>
                <th>Company</th>
                <th>Company Address</th>
                <th>Telephone</th>
                <th>Total Projects</th>
            </tr>
        </thead>

            {% for customer in customers %}
                <tr>
                    <td>{{ customer.customer_id }}</td>
                    <td><a href="{% url 'customer-profile' customer.customer_id %}" class='btn w3-teal'>{{ customer.customer_name }}</a></td>
                    <td>{{ customer.address }}</td>
                    <td>{{ customer.telephone_number}}</td>
                    {% for project in customer.salesProject_set.all %}
                    <td>{{project.count}}</td>
                    {%endfor%}
                </tr>
            {% endfor %}
    </table>
</div>

这是我的模型：

class SalesProject(models.Model):
    customer_information = models.ManyToManyField('CustomerInformation')


class CustomerInformation(models.Model):
    customer_id = models.AutoField(primary_key=True)
    customer_name = models.CharField(max_length=100, default='Lee Ji Eun')
    telephone_number = models.CharField(max_length=100)

我打算访问模板中的m2m字段，以便显示与该公司相关的项目数量的相关计数，但结果不会显示任何内容而不会抛出任何错误。任何帮助都将不胜感激

{customers%中客户的%
            {% for customer in customers %}
                <tr>
                    <td>{{ customer.customer_id }}</td>
                    <td><a href="{% url 'customer-profile' customer.customer_id %}" class='btn w3-teal'>{{ customer.customer_name }}</a></td>
                    <td>{{ customer.address }}</td>
                    <td>{{ customer.telephone_number}}</td>
                    {% for project in customer.salesproject.customer_information.all %}
                    <td>{{project.count}}</td>
                    {%endfor%}
                </tr>
            {% endfor %}

{{customer.customer\u id}
{{customer.address}
{{客户电话号码}
{customer.salesproject.customer_information.all%}
{{project.count}
{%endfor%}
{%endfor%}

---

您可以通过这种方式直接呼叫

我想您应该做：

<td>{{customer.salesproject_set.all.count}}</td>

{{customer.salesproject_set.all.count}

而不是：

{% for project in customer.salesProject_set.all %}
    <td>{{project.count}}</td>
{%endfor%}

{%for customer.salesProject_set.all%}
{{project.count}
{%endfor%}

这回答了你的问题吗？谢谢，是的，它回答了我的问题，很抱歉回复太晚，你绝对是个救命恩人！

{% for project in customer.salesProject_set.all %}
    <td>{{project.count}}</td>
{%endfor%}