将外键字段显示到模板上

Question

class Product(models.Model):
    
    model=models.CharField(max_length=50, null=True)
    serial=models.CharField(max_length=50, null=True)
    hd_size=models.CharField(max_length=50,null=True)
    ram=models.CharField(max_length=50, null=True)
    processor=models.CharField(max_length=50, null=True)
    product_type = models.CharField(max_length=10, null=True)
    date_purchased = models.DateField(null=True)
    date_created = models.DateTimeField(default=timezone.now)
    date_updated = models.DateTimeField(auto_now=True)
    employee = models.ForeignKey(Employee, on_delete=models.SET_NULL, null=True)

我正在尝试显示此模型中的数据，但外键列“employee”未显示在模板上

这是我的模板

<div class="container-fluid">
    <form method= 'POST' id="product-form">
        {% csrf_token %}
        <input type="hidden" name="id" value="{{ product.id }}">
        <div class="form-group mb-3 ">
            <label for="model" class="control-label">Model</label>
            <input type="text" class="form-control rounded-0" id="model" name="model" value="{{ product.model}}" required>
                </div>
        <div class="form-group mb-3 ">
            <label for="serial" class="control-label">Serial No</label>
            <input type="text" class="form-control rounded-0" id="serial" name="serial" value="{{ product.serial}}" required>
        </div>
        <div class="form-group mb-3 ">
            <label for="hd_size" class="control-label">HD Size</label>
            <input type="text" class="form-control rounded-0" id="hd_size" name="hd_size" value="{{ product.hd_size}}" required>
        </div>
        <div class="form-group mb-3 ">
            <label for="ram" class="control-label">RAM</label>
            <input type="text" class="form-control rounded-0" id="ram" name="ram" value="{{ product.ram}}" required>
        </div>
        <div class="form-group mb-3 ">
            <label for="processor" class="control-label">Processor</label>
            <input type="text" class="form-control rounded-0" id="processor" name="processor" value="{{ product.processor}}" required>
        </div>
        <div class="form-group mb-3 ">
            <label for="product_type" class="control-label">Type</label>
            <input type="text" class="form-control rounded-0" id="product_type" name="product_type" value="{{ product.product_type}}" required>
        </div>
            <div class="form-group mb-3 ">
                <label for="date_purchased" class="control-label">date purchased</label>
                <input type="date" class="form-control rounded-0" id="date_purchased" name="date_purchased" value="{{ product.date_purchased}}" required>
            </div>
            <div class="form-group">
                <label for="employee">Employee:</label>
                <select class="form-control" id="employee" name="employee">
                  {% for employee in form.employee.field.queryset %}
                  <option value="{{ employee.address }}">{{ employee.address }}</option>
                  {% endfor %}
                </select>
              </div>     
  
    </form>
</div>

带有外键的字段应该允许我有下拉菜单，我可以从员工表中的员工电子邮件地址列表中进行选择

这是我的观点.py

# product
@login_required
def product_mgt(request):
    context['page_title'] = "Computer List"
    products = Product.objects.all()
    context['products'] = products

    return render(request, 'product_mgt.html', context)

@login_required
def save_product(request):
    resp = {'status':'failed','msg':''}
    if request.method == 'POST':
        if (request.POST['id']).isnumeric():
            product = Product.objects.get(pk=request.POST['id'])
        else:
            product = None
        if product is None:
            form = SaveProduct(request.POST)
        else:
            form = SaveProduct(request.POST, instance= product)
        if form.is_valid():
            form.save()
            
            messages.success(request, 'Computer has been saved successfully.')
            resp['status'] = 'success'
            
        else:
            for fields in form:
                for error in fields.errors:
                    resp['msg'] += str(error + "<br>")
    else:
        resp['msg'] = 'No data has been sent.'
    return HttpResponse(json.dumps(resp), content_type = 'application/json')
     

Answer 1

谢谢你。我已经通过创建一个单独的表单来输入外键字段然后使用此视图保存来解决这个问题

def assign_employee_to_product(request, product_id):
    product = get_object_or_404(Product, pk=product_id)
    if request.method == "POST":
        form = AssignEmployeeForm(request.POST, instance=product)
        if form.is_valid():
            form.save()
            messages.success(request, 'Employee has been assigned a computer successfully.')
            
            
    else:
        form = AssignEmployeeForm(instance=product)
    return render(request, 'assign.html', {'form': form, 'product': product})