I am trying to manually render options for a select filed in a django template. When I submit the form I get an error: "Select a valid choice. That choice is not one of the available choices." The error message also asks for required fields which I have provided.

locations models.py

class Location(models.Model):
    name = models.CharField(max_length=20)
    is_source = models.BooleanField(default=False)
    is_destination = models.BooleanField(default=False)

    def __str__(self):
        return self.name

orders models.py

class Order(models.Model):
    order_number = models.IntegerField(unique=True)
    order_date = models.DateField(auto_now_add=True)
    type = models.CharField(max_length=15, choices=TYPES)
    source = models.ForeignKey(Location, default=1, on_delete=models.SET_DEFAULT, related_name='ordered_here')
    destination = models.ForeignKey(Location, default=1, on_delete=models.SET_DEFAULT, related_name='delivered_here')
    items = models.TextField()
    assigned_to = models.ForeignKey(settings.AUTH_USER_MODEL, null=True, blank=True, on_delete=models.SET_NULL, related_name='orders_to_serve')
    customer = models.ForeignKey(settings.AUTH_USER_MODEL, null=True, blank=True, on_delete=models.SET_NULL, related_name='orders_made')
    status = models.CharField(max_length=15, choices=STATUSES)

orders forms.py

class OrderForm(ModelForm):
    source = forms.ModelChoiceField(queryset=Location.objects.filter(is_source=True))
    destination = forms.ModelChoiceField(queryset=Location.objects.filter(is_destination=True))

    class Meta:
        model = Order
        fields = ['source', 'destination', 'items']


    def save(self, commit=True):
        instance = super().save(commit=False)
        instance.order_number = math.floor(time.time())
        instance.type = 'Purchase'
        instance.customer = self.context.get('request').user
        instance.status = 'New'
        if commit:
            instance.save()

        return instance

orders create.html

<form  method="POST">
                {% csrf_token %}
                <h1 class='text-center'>Make an order</h1>
                <div class='row'>
                    <div class='col-md-6 px-2'>
                        <span >Buy from</span>
                        <div >
                            <i ></i>
                            <select  type="text" name="{{form.source.html_name}}"  required >
                                {% for value,label in form.source.field.choices %}
                                <option value="{{value}}">{{label}}</option>
                                {% endfor %}
                            </select>
                        </div>
                    </div>
                    <div class='col-md-6 px-2'>
                        <span >Receive in</span>
                        <div >
                            <i ></i>
                            <select  type="text" name="{{form.destination.html_name}}"  required >
                                {% for value,label in form.destination.field.choices %}
                                <option value="{{value}}">{{label}}</option>
                                {% endfor %}
                            </select>
                        </div>
                    </div>
                </div>
                <div class='row'>
                    <div class='col-12 px-2'>
                        <span >List items (e.g. 2 X Luxaire Double Bed matress)</span>
                        <div >
                            <textarea  rows="10" name="{{form.items.html_name}}" placeholder='e.g. 2 X Luxaire Double Bed matress' required></textarea>
                        </div>
                    </div>
                </div>
                <button type="submit" >Order</button>
            </form> 

orders view.py

class OrderUpdateView(generic.edit.UpdateView):
    model = Order
    template_name = 'orders/update.html'
    context_object_name = 'order'
    form_class = OrderForm

CodePudding user response：

you cannot do this even if you managed to make the form ignore this error the model will raise the same error elso because you just tell him to select a value from given values ... if you wanna make it dynammic then make it as noraml CharFied()

CodePudding user response：

I have eventually solved the problem by making the customer field in the order model nullable. I also had given my textarea in the order create template a wrong field name. All is well now.