Passing value from template to django view - html

Question

I have a template in which I display some values. Now I want to be able to change that values. So I have an input field with the value "capacity.capacity". The user can now change this value in the input field and click on button "Change".
Now I want to process the newly entered value in my django view. How can I pass the new value to my view?
I tried to add the value in the url so that I can retrieve it in my view again.
Is it possible to add the new value to the url or is there a different/better way to do this?
<td>
<input type="number" name=new_capacity id="new_capacity" step="1" value= {{ capacity.capacity }}>
<button>
<span class="glyphicon glyphicon-edit"></span>
<a href="{% url 'change_capacity' item_id=capacity.pk new_capa=NEWVALUE %}"> Change
</button>
</td>
Update: Full code
I have two forms in this template and two submit buttons. Both buttons should redirect to different views. However it seems that always the same view is called.
{% block body %}
<form action="/producer/capacity/" method="post">
{% csrf_token %}
{{ form }}
<input type="submit" value="Hinzufügen" />
</form>
<br/>
<br/>
<div class="container">
<table class="table">
<thead>
<tr>
<th>Maschine</th>
<th>Verfügbare Kapazität</th>
</tr>
</thead>
<tbody>
{% for capacity in capacity_list %}
<tr>
<td>{{ capacity.pk }}</td>
<td>
<form action="" method="post">{% csrf_token %}
<input type="number" name=new_capacity id="new_capacity" step="1" value="{{capacity.capacity}}" />
<input type="submit" value="Change"/>
</form>
</td>
</tr>
{% endfor %}
</tbody>
</table>
</div>
{% endblock %}

Answer 1

I think it's better to use POST method to make changes in the model data instead of using GET, so you can write a form like this in your template:
<form action="{% url my_app.views.my_capacity_view %}" method="post">{% csrf_token %}
<input type="number" name=new_capacity id="new_capacity" step="1" value="{{capacity.capacity}}" />
<input type="submit" value="Change" />
</form>
You can set the action form url in order to send the field to a custom view to modify the capacity value. Then, in the view, you can get the value and make the change, for example:
def my_capacity_view(request):
if request.method == 'POST':
new_capacity = request.POST.get('new_capacity ', '')
# set new value 'new_capacity' to the object
Set the url to point to the view
(r'^newcapacity', 'my_app.views.my_capacity_view'),
I hope this was useful