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djangodrop-down-menudjango-templates
Max L
Max L

Reputation: 1513

Remember form selection

How to "remember" form selection value in Django?

{% load i18n %}
<form action="." method="GET" name="perpage" >
<select name="perpage">
    {% for choice in choices %}
    <option value="{{choice}}" {% if 'choice' == choice %} selected="selected" {% endif %}>
        {% if choice == 0 %}{% trans "All" %}{% else %}{{choice}}{% endif %}</option>
    {% endfor %}
</select>
<input type="submit" value="{% trans 'Select' %}" />
</form>

Upvotes: 1

Views: 2217

Answers (3)

Burhan Khalid
Burhan Khalid

Reputation: 174624

Generally when you run into a common tasks, chances are there is an easy way to do it in django.

from django import forms
from django.shortcuts import render, redirect

FIELD_CHOICES=((5,"Five"),(10,"Ten"),(20,"20"))

class MyForm(froms.Form):
    perpage = forms.ChoiceField(choices=FIELD_CHOICES)


def show_form(request):
     if request.method == 'POST':
         form = MyForm(request.POST)
         if form.is_valid():
             return redirect('/thank-you')
          else:
              return render(request,'form.html',{'form':form})
      else:
          form = MyForm()
           return render(request,'form.html',{'form':form})

In your template:

{% if form.errors %}
    {{ form.errors }}
{% endif %}

<form method="POST" action=".">
  {% csrf_token %}
   {{ form }}
   <input type="submit" />
</form>

Upvotes: 0

Max L
Max L

Reputation: 1513

@register.inclusion_tag('pagination/perpageselect.html', takes_context='True')
def perpageselect (context, *args):
  """
  Reads the arguments to the perpageselect tag and formats them correctly.
  """
  try:
      choices = [int(x) for x in args]
      perpage = int(context['request'].perpage)
      return {'choices': choices, 'perpage': perpage}
  except(TypeError, ValueError):
      raise template.TemplateSyntaxError(u'Got %s, but expected integer.' % args)

i just added takes_context='True' and take the value from context. The template i edited as 

{% load i18n %}
 <form action="." method="GET" name="perpage" >
 <select name="perpage">
    {% for choice in choices %}
    <option value="{{choice}}" {% if perpage = choice %} selected="selected" {% endif%}>
        {% if choice == 0 %}{% trans "All" %}{% else %}{{choice}}{% endif %}</option>
    {% endfor %}
</select>
<input type="submit" value="{% trans 'Select' %}" />
</form>

Upvotes: 0

dani herrera
dani herrera

Reputation: 51665

sorry about my words, but this seems a bad aproach. The django way to work with this is a simple form with a initial value for your selected choice. If you don't belive me, and you persist in this way, then change your template if as:

{% if choice == myInitChoice %}

Don't forget to send myInitChoice to context. 

c = RequestContext(request, {
    'myInitChoice': request.session.get( 'yourInitValue', None ),
})
return HttpResponse(t.render(c))

Upvotes: 2

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