如何遍历表单字段并将它们全部存储在数据库中？

Question

我正在尝试遍历表单字段并将它们存储在数据库中.问题是它始终只是存储的最后一个字段.之前的"被跳过".我可以通过以下方式处理Django中的表单吗？

models.py:

class Category(models.Model):
    name = models.CharField(max_length=30, unique=True)
    user = models.ForeignKey(User, blank=True, null=True)

    class Meta:
        verbose_name_plural = "Ingredience Categories"

    def __unicode__(self):
        return self.name

forms.py

class CategoryForm(ModelForm):
    class Meta:
        model = Category
        fields = ('name',)

home.html模板(我手动"构建我的表单",因为我希望能够通过jQuery动态添加更多输入字段):

<h3>Insert New Categories</h3>
<form action="/" method="post" id="ingr-cat-form">{% csrf_token %}
    <p><label for="id_0-name">Name:</label> <input type="text" maxlength="30" name="name" id="id_0-name"></p>
    <p><label for="id_1-name">Name:</label> <input type="text" maxlength="30" name="name" id="id_1-name"></p>
    <p><label for="id_2-name">Name:</label> <input type="text" maxlength="30" name="name" id="id_2-name"></p>
    <input type="submit" name="ingrCatForm" value="Save" /> 
</form> 

views.py:

def home(request):
    if request.method == 'POST':
        catform = CategoryForm(request.POST, instance=Category()) # store bounded form to catform
        catformInstance = catform.save(commit = False)  # create instance for further modification, don't commit yet
        catformNames = request.POST.getlist('name') # get a list of input values whose element name is "name"
        for name in catformNames: # loop through all name elements
            catformInstance.name = name # modify form instance; insert current name
            catformInstance.save() # save the instance to the database
        return HttpResponseRedirect('')
    else:
        catform = CategoryForm(instance=Category())

    context = {'catform': catform}
    return render_to_response('home.html', context, context_instance=RequestContext(request))

测试案例步骤:

1. 在3个输入字段中插入以下值:value1,value2,value3
2. 按提交按钮

预期结果:

• 所有3个值都存储在数据库中

实际结果:

• 只有最后一个值(value3)存储在数据库中

Answer 1

您只创建一个实例catformInstance,然后每次在循环中更改它的值.您正在更新数据库中的一行,而不是每次都创建一个新行.

改为:

    for name in request.POST.getlist('name'):
        catform = CategoryForm({'name': name}, instance=Category())
        catform.save()

请注意,我们name明确地传递每个POST值而不是整个值集; 在这种情况下,它只会从name列表中获取姓氏,然后在下一次迭代中失败,因为name请求中不再可用.