How to access and make use of html data in django? - html

Question

I am having a hard time figuring out the right logic for my problem, i have 3 models,
class Item(SmartModel):
name= models.CharField(max_length=64,help_text="Name for this item e.g Hamburger")
price=models.DecimalField(max_digits=9,decimal_places=2)
optionalitems = models.ManyToManyField('optionalitems.OptionalItemCategory',null=True,blank=True)
class OptionalItems(SmartModel):
"""Optional items that belong to an item e.g topping that belongs to a pizza"""
name = models.CharField(max_length=20, help_text="Item name.")
price = models.DecimalField(max_digits=9, decimal_places=2, null=True,blank=True)
class OptionalItemCategory(SmartModel):
"""Category to which optional items belong"""
title = models.CharField(max_length=20,help_text="Category name")
optional_items = models.ManyToManyField(OptionalItems)
in my template,
{%for optionalcategory in optionalcategories %}
<h5 id="blah"> {{ optionalcategory.title}} </h5>
{% for optionalitem in optionalcategory.optional_items.all %}
<ul>
<input type="radio" value="radio" name="optional" value="op"><li id="item_appearence">{{optionalitem.name}}<span> {{optionalitem.price}}</span></li><a/>
</ul>
{% endfor %}
{% endfor %}
So for example an Item like a burrito will have an OptionalItem steak or chicken.I am able to access the Item like so item = get_object_or_404(Item, pk=obj.id) but my problem is i cannot figure out how to capture the OptionalItem. I want to be able to access the OptionalItem, i want to obtain the value of the radio button and its attributes. its kind of tricky.

Answer 1

Your code is inconsistent and that makes it hard to read, understand and work with. Some advice, clean it up. Something like this:
class Category(models.Model):
name = models.CharField(max_length=200)
class Option(models.Model):
name = models.CharField(max_length=200)
price = models.DecimalField(max_digits=9, decimal_places=2, blank=True, null=True)
class Item(models.Model):
category = models.ForeignKey(Category)
name = models.CharField(max_length=200)
price = models.DecimalField(max_digits=9, decimal_places=2, blank=True, null=True)
options = models.ManyToManyField(Option)
Than you need a from and a view. As I interpret your question: you want a form to select a option for an Item. So the code below will render all options and the widget RadioSelect() lets the user select one item. But why use radiobuttons? If an Item has a relation to one Option, than the Item model should have a foreignKey not M2M!
Form:
class ItemForm(ModelForm):
options = forms.ChoiceField(widget=forms.RadioSelect())
class Meta:
model = Item
fields = ( 'options', )
View:
from django.shortcuts import render
from django.http import HttpResponseRedirect
def your_view(request, id):
item = Item.objects.get(pk=id) # Your item object.
if request.method == 'POST': # If the form has been submitted...
form = ContactForm(request.POST) # A form bound to the POST data
if form.is_valid(): # All validation rules pass
# Process the data in form.cleaned_data
options = form.cleaned_data['options']
# ...
return HttpResponseRedirect('/thanks/') # Redirect after POST
else:
form = ArticleForm(instance=article)
return render(request, 'contact.html', {
'form': form,
})
Template:
{% for obj in item.options_set.all %}
{{ obj.name }} {{ obj.price }}
{% endfor %}
<form action="" method="post">{% csrf_token %}
{{ form.as_p }}
<input type="submit" value="Submit" />
</form>
I dind't test the code. But this should get you started. The documentation is your friend:
https://docs.djangoproject.com/en/1.5/topics/forms/
https://docs.djangoproject.com/en/1.5/#forms

Answer 2

In your template, you can simply render the price. I'd write a method in the Item model, that formats the OptionalItems the way you like.
i.e.
class Item(SmartModel)
...
def get_optional(self):
return ','.join([a.optionalitems for a in self.optionalitems.all()])
Of course, you should change that method to have it format the way you'd like.
If you pass a queryset of Items to your template, you can do something like the following:
{% for item in items %}
Name: {{ item.name}}
Price: {{ item.price }}
Optional Items: {{ item.get_optional }}
{% endfor %}