Question

如何实施表格来更新数量？我不知道该怎么做。感谢

class Car(models.Model):
    name = models.CharField(max_length=50)
    price = models.DecimalField()    

class GarageCar(models.Model):
    car = models.ForeignKey('Car')
    garage = models.ForeignKey('Garage')
    quantity = models.IntegerField()

class Garage(models.Model):
    name = models.CharField("Garage_Name", max_length=30)
    cars = models.ManyToManyField('Car', through='GarageCar', blank=True, null=True)
    owner = models.ForeignKey(User, related_name='owner_garage', verbose_name='Owner Garage')

以这种方式更新数量：

In [2]: c = Car.objects.get(id=1) #here I need car ID

In [3]: g = Garage.objects.get(owner=1)

In [4]: q = 33 #here I need data from form

In [5]: c= GarageCar.objects.filter(car=c, garage=g).update(quantity=q)

的观点：

def show(request):
    user = request.user
    garage = Garage.objects.get(owner=user)

    return render_to_response('garage.html', {'garage': garage, 'form':form})

在garage.html：

{% for item in garage.garagecar_set.all %}
        Car:      {{item.car.name}}
        Price:    {{item.car.price}} 
        Quantity: {{item.quantity}} 
        ID:       {{item.car.id}}
{% endfor %}

form.py中的

：

from django import forms

class QuantityForm(forms.Form):
    q = forms.IntegerField

如何创建ORM查询以更新数量？

如何在模板中显示每辆车旁边的表单字段（使用“更新”按钮）？

Answer 1

看起来你会对FormSets感兴趣，特别是InlineFormSets：

https://docs.djangoproject.com/en/dev/topics/forms/modelforms/#using-an-inline-formset-in-a-view

如果你想让它变得非常容易（可能以理解它的工作方式为代价），你可以使用我的通用视图来完全用这个用例。

我的图书馆：https://github.com/AndrewIngram/django-extra-views

则...

views.py：

import extra_views 

class EditProductReviewsView(extra_views.InlineFormSetView):
    model = Garage
    inline_model = GarageCar
    fields = ('quantity', )
    template_name = 'garage.html'

garage.html：

<form action="." method="post">
{% csrf_token %}

{{ formset.management_form }}

<table>
{% for form in formset %}
<tr>
<td>{{ form.instance.car.name }}</td>
<td>{{ form.instance.car.price }}</td>
{% for field in form.visible_fields %}
<td>
{{ field }}
</td>
{% endfor %}
<div style="display: none;">
{% for field in form.hidden_fields %}{{ field }}{% endfor %}
</div>
<td>{{ form.quantity }}</td>
<td>{{ form.instance.car.id }}</td>
</tr>
{% endfor %}
</table>


<input type="submit" />
</form>

我没有测试过这个例子，我不记得你是否需要将id字段添加到fields元组中。但基本要点应该是正确的。

如何实现表单来更新数量？

1 个答案: