I am making an auction site and I try passing the user who posted a bid on a listing through a form. I already asked this about passing the creator of a listing and I tried the same method but I cannot manage to do it.

My view looks something like this (I shortened it because it's very long):

def show_listing(request, listing_id):
     listing = AuctionListing.objects.get(id=listing_id)
     bidding = listing.bidlisting.last()
     if bidding is None:
        field_name = "starting_bid"
        starting_bid = getattr(listing, field_name)
        createbidform = CreateBid(initial={"bids": starting_bid, "user":request.user})
     else:
        field_name2 = "bids"
        highest_bid = getattr(bidding, field_name2)
        createbidform = CreateBid(initial={"bids": highest_bid, "user":request.user})
     if request.method == "POST":
        form = CreateBid(request.POST)
            if bidding is None and float(form['bids'].value()) >= float(starting_bid):
                if form.is_valid():
                        message = "Your bid is placed"
                        form.instance.listing = listing
                        form.save()
                        createbidform = CreateBid(initial={"bids": form['bids'].value(), "user":request.user})
                        amount_bids = len(Bid.objects.filter(listing=listing_id))
                        return render(request, "auctions/listing.html", {
                         "createbidform" : createbidform
                        })
                else: 
                    print(form.errors)
     return render(request, "auctions/listing.html", {
                        "bidform" : createbidform
                        })

listing.html looks something like this:

<form method="POST">
        {% csrf_token %}
            &#36;{{ bidform.bids }}
            <button type="submit" name="bidbid" >Place your bid</button>
        
    </form>

RIGHT NOW form.errors prints:

<ul ><li>user<ul ><li>This field is required.</li></ul></li></ul>

Here is the model Bid:

class Bid(models.Model):
    listing = models.ForeignKey(AuctionListing, on_delete=models.CASCADE, related_name="bidlisting")
    bids = models.DecimalField(max_digits=6, decimal_places=2)
    user = models.ForeignKey(User, on_delete=models.CASCADE, db_constraint=False, related_name="userrr")
    def __str__(self):
        return str(self.bids)

And here is the form CreateBid:

class CreateBid(forms.ModelForm):
    class Meta:
        model = Bid
        fields = ('bids', 'user')
        widgets = {
            'user': forms.HiddenInput(),
        }

    def __init__(self, *args, **kwargs):
        user = kwargs.pop('user')
        super().__init__(*args, **kwargs)
       
        self.fields['user'].initial = user.id

For some reason it doesn't provide the user who posted the bidding to the form, causing the form to not be valid. How to fix this?

CodePudding user response：

You already do it with bids so you don't need extra kwarg:

 createbidform = CreateBid(initial={'bids': starting_bid, 'user': request.user})

you can remove __init__ method form CreateBid form class

Template:

<form method="POST">
        {% csrf_token %}
            &#36;{{ bidform }}
            <button type="submit" name="bidbid" >Place your bid</button>
        
    </form>