Image upload form ValueError

Using Django Forms & APIs
1

Hi folks wonder if anyone could help me with this. I have a very simple for which includes a ImageField to handle uploads. I’m getting the error below.

ValueError: Field 'id' expected a number but got......b'\xff\xd8\xff\xe1\x0.........

I’m pretty sure it’s because the image field is a M2M, but I ‘think’ i’m handling that correctly in my views. Any help much appreciated.

Models … I need a House to have many images…relevant code

class Image(models.Model):
    image = models.ImageField()

    def __str__(self):
        return self.image.name
    

class House(models.Model):
   
    image = models.ManyToManyField(Image, null=True, blank=True)
    
    def __str__(self):
         return self.name

Form…

class HouseForm(ModelForm):
    class Meta:
        model = House
        fields = ["name", "description", "status", "image", "link", "date"  ]

    image = forms.ImageField()
        

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.fields['name'].required = False

Views…(Httpresponse for testing)

def houseform(request):
    if request.method == 'POST':
        form = HouseForm(request.POST, request.FILES)
        print(request.POST, "file", request.FILES) 

        if form.is_valid():
            house = form.save(commit=False)  
            house.save() 
            form.save_m2m() 
            return HttpResponse("foo")
        else:
            print(form.errors)
            return HttpResponse("bar")
    else:
        form = HouseForm()
        return render(request, 
                      template_name="core/partials/forms/house-form.html",
                      context={'form': form })

Template (using widget tweaks)…form inlcudes enctype…

  <form  method="post"
              action="{% url 'houseform' %}"
              enctype="multipart/form-data">
              
              <div class="flex flex-col gap-3">
                    {% csrf_token %}
                    <label class="text-sm" for="name">Name</label>
                    {% render_field form.name placeholder="Name" class="input input-bordered w-full max-w-xs"%}
             
                    <label class="text-sm" for="image">Image</label>
                    {% render_field form.image placeholder="Image" class="file-input file-input-bordered file-input-accent w-full max-w-xs"%}
                   
            <button type="submit">Submit</button>
            <a hx-boost="true" href="{% url 'dashboard' %}" class="text-blue-500 hover:text-blue-700">Back</a>
        </form>
2

First, when requesting assistance with an error, please post the complete error and traceback.

Second, your HouseForm has an image field, but that field is not associated with an Image object.

What I suggest you do is create a second ModelForm for the Image objects to save the image there, and then create the association between the two objects.

1 Like
3

Ah ok, thanks Ken pretty sure I understand.