表单仅在单击提交按钮后显示

Question

我已经检查了有关根本没有显示的表单的类似帖子，并且我已经尝试应用修复程序，但它并没有为我修复它。我有以下几点：股票.html：<form method="post" class="form-inline my-2 my-lg-0">  {% csrf_token %}  {{ symbol_form }}  <button class="btn btn-secondary my-2 my-sm-0" type="submit">Add Stock</button></form>视图.py：class PortfolioStockListView(ListView):    model = StockPortfolio    template_name = 'stocks.html'    def post(self, request):        symbol_form = StockSymbolForm(request.POST)        if request.method == 'POST':            if symbol_form.is_valid():                model_instance = symbol_form.save(commit=False)                model_instance.timestamp = timezone.now()                model_instance.save()                return redirect('/')                else:                return render(request, 'stocks.html', {'symbol_form': symbol_form})        else:            symbol_form = StockSymbolForm()            return render(request, 'stocks.html', {'symbol_form': symbol_form})形式.py：class StockSymbolForm(ModelForm):    class Meta:        model = StockPortfolio        fields = ['username', 'stock_symbol' , 'stock_qty']模型.py：class StockPortfolioUser(models.Model):    username = models.OneToOneField(User, on_delete=models.CASCADE)    usercash = models.PositiveIntegerField(default=100000)class StockPortfolio(models.Model):    username = models.ForeignKey(StockPortfolioUser, on_delete=models.CASCADE)    stock_symbol = models.CharField(max_length=5)    stock_qty = models.PositiveIntegerField(default=0)如何解决导致表单隐藏直到单击按钮的问题？如有必要，我可以从其他文件共享更多代码。

Answer 1

将其传递给您的模板覆盖get_context_data方法

class PortfolioStockListView(ListView):

    model = StockPortfolio

    template_name = 'stocks.html'

    def get_context_data(self, *, object_list=None, **kwargs):

        context = super(PortfolioStockListView, self).get_context_data(object_list=object_list, **kwargs)

        context['symbol_form'] = StockSymbolForm()

        return context

    def post(self, request):

        ...