When instantiating a form inside the view function e.g form = submit_bid() django crashes and gives the error " submit_bid() missing 1 required positional argument: ‘request’ ".
I’m recreating a auction site (eBay like). One of the views (view_listing) returns a template where among other things it have an input field so the user can set his own bid on the listing. The thing is that when i create the form = submit_bid() in the view to serve it to the template, i obtain the error that needs a 1 positional argument request (for what i understand i only need pass this on a POST request, and im actually working on the GET request to serve the form to the template). So django crashes. I also have another view (create_auction) where i instantiated a form succesfully (like i described before form = create_auction() and works flawesly, but in this particular view im getting problems. I will leave the code from my forms.py, also of the view. I have to mention that im new to django, and this are my first attemps to working with it
forms.py:
from django import forms
from .models import Auction, Bid, Comment, Watchlist
class create_auction(forms.ModelForm):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
for visible in self.visible_fields():
visible.field.widget.attrs['class'] = 'text-center form-control mb-3'
visible.field.widget.attrs['placeholder'] = visible.field.label
if 'image_url' in self.fields and isinstance(self.fields['image_url'].widget, forms.Textarea):
self.fields['image_url'].widget.attrs['rows'] = 2
if 'description' in self.fields and isinstance(self.fields['description'].widget, forms.Textarea):
self.fields['description'].widget.attrs['rows'] = 2
class Meta:
model = Auction
# If we set the exclude fields, it will render evertything but not that ones.
# fields = '__all__'
exclude = ['user_owner', 'auction_on', 'date_started']
widgets = {
'ending_date': forms.DateInput(attrs={'type': 'date'}),
}
class submit_bid(forms.Form):
bid_ammount = forms.FloatField()
views.py (the particular view_listing):
def view_listing(request, id):
form = submit_bid()
print(form)
if request.method == "POST" and form.is_valid:
pass
try:
auction_data = get_object_or_404(Auction, id=id)
except Http404:
render (request, 'error_404.html')
# Total number of bids on the listing
numberof_bids_onlisting = auction_data.bids.count()
# Id of the user if logged_in
user_logged_id = request.user.id
# A list of bids on the listing.
bids = auction_data.bids.values_list('bid', flat=True)
# The current max bid and user id of the bid.
all_bids_on_listing = auction_data.bids.values('bid', 'user')
max_bid_info = max(all_bids_on_listing, key=lambda x: x['bid'], default=None)
user_bid_is_greatest = False
if request.user.id == max_bid_info['user']:
# Set it to true if the logged in user is the one that the bid is winning.
user_bid_is_greatest = True
return render(request, "auctions/view_listing.html", {'auction': auction_data, 'total_bids': numberof_bids_onlisting, 'max_bid_info': max_bid_info, 'user_bid_is_greatest': user_bid_is_greatest,})
Also i leave the template here (view_listing.html):
{% extends "auctions/layout.html" %}
{% block body %}
<h2 class="view-listing-title">Listing: {{ auction.title }}</h2>
<div class="container-fluid">
<div class="view-listing-container container-fluid justify-content-center">
<a href="/watchlist_add"><span class="badge text-bg-primary ">Watchlist</span></a>
<img class="img-fluid" src="{{ auction.image_url }}">
</div>
<h4>{{ auction.description }}</h3>
{% if total_bids == None %}
<h3>${{ auction.starting_price }}</h3>
{% else %}
<h3>${{ max_bid_info.bid }}</h3>
{% endif %}
{% if request.user.is_authenticated %}
{% if total_bids == None %}
<p>There is no bid(s) still.</p>
{% else %}
{% if user_bid_is_greatest %}
<p>{{ total_bids }} bid(s) so far. Your bid is the current bid.</p>
{% else %}
<p>{{ total_bids }}bid(s) so far.
{% endif %}
{% endif %}
<form action="/submit_bid" method="POST">
{% csrf_token %}
{{ form.as_p }}
</form>
{% else %}
{% if total_bids == None %}
<p>There is no bid(s) still.</p>
{% else %}
<p>{{ total_bids }}bid(s) so far.
{% endif %}
{% endif %}
<h3>Details</h3>
<ul>
<li>Listed by: {{ auction.user_owner }}</li>
<li>Category : {{ auction.auction_category }}</li>
</ul>
</div>
{% endblock %}
I have to say that the form its imported on the views.py, the url its registered in urls.py. If i pass the argument request to form=submit_bid(request) then when i do print(form) obtain None. I leave here the debugging image of django:
Thank you in advance guys.