how to Pass variable in link to the django view

Question

I have a html form which display data using a for loop.

<tbody id="table">
    {% for sku, lid, stk, mrp, sp, stts in product_data %}
    <tr>
        <td>
            <a class="btn-link" href="/product/product.html" value="{{sku}}">{{sku}}</a>
        </td>
        <td>{{lid}}</td>
        .....

This code prints data in a table using a for loop with a link in first colyumn of table.
The link points to a new page where i want some data to be displayed.
Now The displayed data is dynamically generated from a mongodb database. I want when i click on the link it pass the value as a parametre to a django view so can fetch data which contains the parametre and show it on the next page. How to do that?

My views.py:

from django.shortcuts import render
from django.http import HttpResponse
from inventory.models import GetProductData

def inventory(request):
    pd = GetProductData().skuData()
    sku = pd[0]
    listing_id = pd[1]
    stock_count = pd[2]
    mrp = pd[3]
    status = pd[5]
    selling_price = pd[4]

    product_data = zip(sku, listing_id, stock_count, mrp, selling_price, status)
    context_dict = {'product_data':product_data}
    return render(request, 'inventory/inventory.html', context_dict)

def product(request):
    return render(request, 'inventory/product.html')

Solution 1

First of all, its not advisable to use html name when you add a url. Instead of having

href="/product/product.html"

you could have just had something like

href="/product/"

so in your urls.py you should have it defined as below

url(r'^product/$', product),

where 'product ' is the corresponding view handling that request.

Now if you want to send some parameters to django from the html

render your template as below

<tbody id="table">
    {% for sku, lid, stk, mrp, sp, stts in product_data %}
    <tr>
        <td>
            <a class="btn-link" href="/product/?sku={{ sku }}">{{sku}}</a>
        </td>
        <td>{{lid}}</td>
        .....

and in your view i.e; at products

def product(request):
    if request.method=='GET':
        sku = request.GET.get('sku')
        if not sku:
            return render(request, 'inventory/product.html')
        else:
            # now you have the value of sku
            # so you can continue with the rest
            return render(request, 'some_other.html')

Solution 2

It can be done in 2 ways, using get and using URL parameter.

Using get is simply and flexible, but will lead to ugly URLs:

            <a class="btn-link" href="/product/product.html?parameter={{ your_parameter_here }}" value="{{sku}}">{{sku}}</a>

And inside view, you can access it like this:

def product(request):
    your_parameter = request.GET['parameter']
    return render(request, 'inventory/product.html')

Using url parameters is much better way, it is also more DRY than get parameters (especially when not using {% url %} tag with get).

Your urls.py should look like this:

urlpatterns = [
    url(r'^product/product-(?P<parameter>[\w-]+).html', 'views.product', name="product"),
]

Getting that parameter in view:

def product(request, parameter): # it's just passed as kwarg into view
    return render(request, 'inventory/product.html')

and creating URL in your template:

            <a class="btn-link" href="{% url "product" parameter=your_parameter_here %}" value="{{sku}}">{{sku}}</a>