从列表django中获取默认值

Question

我有一个包含状态列表的网站，如何仅从提交表单时创建的列表中检索步骤 1 并将其存储到数据库中？

models.py

class Photo(models.Model):
    STEP1 = "step 1"
    STEP2 = "step 2"
    STEP3 = "step 3"
    STEP4 = "step 4"

    STATUS = (
        (STEP1, 'Received'),
        (STEP2, 'Cleaning'),
        (STEP3, 'Leak '),
        (STEP4, 'Loss Pressure Test'),

    )

    Datetime = models.DateTimeField(auto_now_add=True)


    serialno = models.TextField()  # serialno stand for serial number
    partno = models.TextField()  # partno stand for part number
    reception = models.TextField()
    Customername = models.TextField()

    def __str__(self):
        return self.reception

forms.py

class AddForm(forms.Form):
    reception = forms.CharField(label='',
                                widget=forms.TextInput(
                                    attrs={"class": 'form-control', 'placeholder': 'Enter reception number'}))
    partno = forms.CharField(label='',
                             widget=forms.TextInput(
                                 attrs={"class": 'form-control', 'placeholder': 'Enter part number'}))
    serialno = forms.CharField(label='',
                               widget=forms.TextInput(
                                   attrs={"class": 'form-control', 'placeholder': 'Enter Serial Number'}))
    Customername = forms.CharField(label='',
                                   widget=forms.TextInput(
                                       attrs={"class": 'form-control', 'placeholder': 'Enter customer name'}))

    class meta:
        model = Photo
        fields = ('reception', 'partno', 'serialno', 'Customername')

views.py

def addPhoto(request):
    msg = None
    if request.method == 'POST':
        form = AddForm(request.POST)
        if form.is_valid():
            Datetime = datetime.now()
            reception = form.cleaned_data['reception']
            partno = form.cleaned_data['partno']
            serialno = form.cleaned_data['serialno']
            Customername = form.cleaned_data['Customername']
            # create a new MCO object with the form data
            form = Photo(Datetime=Datetime, reception=reception, partno=partno, serialno=serialno, Customername=Customername)
            form.save()
            context = {'form': form}
            return redirect('/gallery', context)
        else:
            msg = 'form is not valid'
    else:
        form = AddForm()

    return render(request, 'photos/add.html', {'form':  form,})

这是用户输入详细信息的页面：

这是显示详细信息的页面（在完成操作后，它应该显示用户提交表单时收到的第 1 步，我该怎么做？：

Answer 1

为此，您可以在数据库中创建一个字段调用状态，这样默认情况下该值将为 default = STEP1，如下所示：

 class Photo(models.Model):
        STEP1 = "Received"
        STEP2 = "Cleaning"
        STEP3 = "Leak"
        STEP4 = "Loss Pressure Test"
    
        STATUS = (
            (STEP1, 'Received'),
            (STEP2, 'Cleaning'),
            (STEP3, 'Leak '),
            (STEP4, 'Loss Pressure Test'),
    
        )
    
        Datetime = models.DateTimeField(auto_now_add=True)
        #i add the status here so by default it is just "Received"
        status  = models.CharField(max_length=20,choices=STATUS,
            default=STEP1)
    
        serialno = models.TextField()  # serialno stand for serial number
        partno = models.TextField()  # partno stand for part number
        reception = models.TextField()
        Customername = models.TextField()
    
        def __str__(self):
            return self.reception

之后
1) 运行进行迁移并迁移
现在在你的模板中你可以调用“your_instance.status”.

Answer 2

你的另一个问题的答案：
我如何做到当用户编辑 table 时，完成的操作将显示第 2 步？
让我们做这样的事情。
forms.py:

from .models import Photo


class PhotoForm(forms.ModelForm):
    class Meta:
        model = Photo
        fields = ['serialno','partno','reception','Customername']

views.py

from .forms import PhotoForm
from .models import Photo
from django.shortcuts import render,get_object_or_404,redirect
def editphoto(request,photo_id):
    photo = get_object_or_404(Photo,pk=photo_id)
    if request.method == 'POST':
        form = PhotoForm(request.POST or None)
        if form.is_valid():
            form.save()
            #we can do something like this to check that serial number has changed 
            if form.serialno != photo.serialno:
                form.serialno = 'Cleaning'
                form.save()
            return redirect('***somewhere***')
    else:
        form = PhotoForm(instance=photo)
    return render(request,'your-template',{'form':form})

但请注意，这里存在安全问题，我实际上并没有检查用户是否是该 post.so 的作者，基本上现在任何用户都可以编辑 post，就是这样 bad.to 避免这种情况，你可以在 Photo 和你的 views.py 中为 User(model) 创建一个外键，你可以检查是否只是做这样的事情：photo = get_object_or_404(Photo ,pk=photo_id,author_id=request.user.pk) 现在当用户不是 post 的作者时它会引发 Not Found Page,即它。
快乐编码。

从列表django中获取默认值

Get the default value from a list django

python

django

django-models

django-forms

django-views