Question

Argh. Hey all, i have a muy simple django question:

And argh, i’m sorry, i’ve read and read, and I am sure this is covered somewhere super-obviously, but i haven’t found it!

How do i edit/update a model using django? Like, the data values? Not the model fields?

Here is my code! (I’m using a home-brew version of stuff!)

Here is the urls:

url(r'^editStory/(?P<id>\d+)$',
    StoryModelView.as_view(
        context_object_name='form',
        template_name ='stories/editStory.html',
        success_template= 'stories/editStorySuccess.html'
    ),
    {},
    'editStory'
),

Here is the view:

def get(self,request,id=None):
    form = self.getForm(request,id)
    return self.renderValidations(form)

def getForm(self, request,id):
    if id:
        return self.getModelById(request,id)
    return StoryForm()

def getModelById(self,request,id):
    theStory = get_object_or_404(Story, pk=id)
    if theStory.user != request.user:
        raise HttpResponseForbidden()
    return StoryForm(theStory)

def renderValidations(self,form):
    if self.context_object_name:
        contextName = self.context_object_name
    else:
        contextName = 'form'
    if self.template_name:
        return render_to_response(self.template_name,{contextName:form})
    else :
        return render_to_response('stories/addStory.html',{contextName:form})

def getPostForm(self,request,id):
    if id:
        theStory = self.idHelper(request,id)
        return StoryForm(request.POST,theStory)
    return StoryForm(request.POST)

def processForm(self,form,request):
    theStory = form.save(commit=False)
    theStory.user = request.user
    return theStory

Here is the template code:

{% block content %}
    <h3>Edit story</h3>
    <form action="" method="post">
        {%  csrf_token %}
        {%  for field in form %}
            <div class="fieldWrapper">
                {{ field.errors }}
                {{ field.label_tag }} {{ field }}
            </div>
        {% endfor %}
        <input type="submit" value="Submit"/>
    </form>
{% endblock %}

try as i might, i either:

1. get an error
2. get nothing

i get an error with the code as-displayed, caused by this line

    {% for field in form %}

and with the error of:

Caught AttributeError while rendering: 'Story' object has no attribute 'get'

or i get nothing – no data at all – if i change my “getModelById” method to read:

def getModelById(self,request,id):
    theStory = get_object_or_404(StoryForm, pk=id)
    if theStory.user != request.user:
        raise HttpResponseForbidden()
    return theStory

StoryForm is one of those “ModelForm” things, and its model is “Story”.

SO! The question:

how do i fix this code to make it work? What have i done wrong?

Answer 1

You don’t show what your class is inheriting from, but it seems like you’re just using a standard single object display view. Instead, you should use one of the editing mixins that are provided for this purpose.