I realized, this could be the solution:
I changed spadmin_newstickeritem_changeform.html this way:
{% extends "spweb/spadmin/spadmin_base_ext.html" %}
{% block content %}
{% if newstickeritem_id %}
<form action="{% url 'spadmin_newstickeritem_changeform_update'
newstickeritem_id %}" method="post">
{% else %}
<form action="{% url 'spadmin_newstickeritem_changeform_add' %}"
method="post">
{% endif %}
{% csrf_token %}
{{ form.as_p }}
<input type="submit" value="Save"/>
</form>
{% endblock %}
2014. szeptember 3., szerda 0:18:41 UTC+2 időpontban Jagger a következőt
írta:
>
> Hi Everyone!
>
>
>
> I intend to write an add/update form.
>
>
> *models.py*:
>
> class NewsTickerItem(models.Model):
> #Content
> content = models.CharField(max_length=60)
> #Highlighted
> is_highlighted = models.BooleanField()
> #Active
> is_active = models.BooleanField()
> # Ordering number
> ordernum = models.IntegerField()
> #Expiry time
> expiry_time = models.DateTimeField()
>
> def __unicode__(self):
> return self.content
>
>
>
> *forms.py*:
>
> class NewsTickerItemForm(ModelForm):
> class Meta:
> model = NewsTickerItem
>
>
>
> *urls.py*:
>
> url(r'^spadmin_newstickeritem_changeform/add/$',
> views.spadmin_newstickeritem_changeform,
> name='spadmin_newstickeritem_changeform_add'),
>
> url(r'^spadmin_newstickeritem_changeform/(?P<newstickeritem_id>\d+)/$',
> views.spadmin_newstickeritem_changeform,
>
> name='spadmin_newstickeritem_changeform_update'),
>
> I have a link (spadmin_newstickeritem_changeform_add) on my webpage to add
> new items, and another link (spadmin_newstickeritem_changeform_update) to
> update existing items. Both links refer to
> views.spadmin_newstickeritem_changeform method.
>
>
>
> *views.py*:
>
> def spadmin_newstickeritem_changeform(request, newstickeritem_id = None):
> if request.method == 'POST':
> if newstickeritem_id:
> newstickeritem =
> NewsTickerItem.objects.get(pk=newstickeritem_id)
> form = NewsTickerItemForm(request.POST,
> instance=newstickeritem)
> else:
> form = NewsTickerItemForm(request.POST)
>
> if form.is_valid():
> form.save()
> return
> HttpResponseRedirect(reverse('spadmin_newstickeritem_changelist'))
> else:
> if newstickeritem_id:
> newstickeritem =
> NewsTickerItem.objects.get(pk=newstickeritem_id)
> form = NewsTickerItemForm(instance=newstickeritem)
> else:
> form = NewsTickerItemForm()
>
> context = {'functiontitle': 'Newsticker item', 'form': form,
> 'newstickeritem_id': newstickeritem_id}
> return render(request,
> 'spweb/spadmin/spadmin_newstickeritem_changeform.html', context)
>
> I treat adding, and updating in one method.
>
>
>
> *spadmin_newstickeritem_changeform.html*:
>
> {% extends "spweb/spadmin/spadmin_base_ext.html" %}
> {% block content %}
> <form action="{% url 'spadmin_newstickeritem_changeform_update'
> newstickeritem_id %}" method="post">{% csrf_token %}
> {{ form.as_p }}
> <input type="submit" value="Save" />
> </form>
> {% endblock %}
>
>
> It works on update, because the newstickeritem_id exists. If
> newstickeritem_id == None (in case of adding a new item), I get this error
> message:
> "Reverse for 'spadmin_newstickeritem_changeform_update' with arguments
> '(None,)' and keyword arguments '{}' not found. 1 pattern(s) tried:
> ['spadmin_newstickeritem_changeform/(?P<newstickeritem_id>\\d+)/$']"
>
> How can I handle newstickeritem_id == None. How can I change form action
> to spadmin_newstickeritem_changeform_add, in case of adding a new item.
> Should I make different adding and updating templates?
>
>
> Thanks for your answers!
>
>
>
>
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