Issues saving a formset form with multiple forms.

[Jason S]

Hi, 

Disclaimer - I'm new to django and python, so please bear with me.

Note: My django instance uses a nosql database.

I'm trying to create a formset which has multiple forms based on models.

The formset will have one form "post", then 1-3 "comment" forms. Eventually i'd like to be able to add/remove the comment fields but i'll work that out later once the form saves with manually set number of comment fields. 

For now the formset just has the two forms "post" and "comment" to make it easy, but if i can save one it should work for more.

The form displays as expected but I get "save() takes at least 2 arguments (1 given)".

I think thats because i'm supplying the "post" data, but not the object itself? I've tried referencing it but without success.

I may need to set the form up as a class with methods and then use something like the following which is how another tut does it, but my first attempt to do it this way failed.

 21     def post(self, request, *args, **kwargs):

 22         self.object = self.get_object()

 23         form = CommentForm(object=self.object, data=request.POST)

 24

 25         if form.is_valid():

 26             form.save()

 27             return HttpResponseRedirect(self.object.get_absolute_url())

Models:

  7 class Object_Post(models.Model):

  8     # Defines the post model

  9     def __unicode__(self):

 10         return self.name

 11

 12     name = models.CharField(max_length=70)

 13     desc = models.TextField()

 14     Comments = ListField(EmbeddedModelField('Comment), editable=False)

 15

 16

 17 class Comment(models.Model):

 18     # Comments.

 19     def __unicode__(self):

 20        return self.name

 21

 22     name = models.CharField(max_length=70)

 23     desc = models.TextField()

Forms:

 39 class PostForm(forms.ModelForm):

 40     class Meta:

 41         model = Object_Post

 42

 43     def save(self, user, commit = True):

 44         Object_Post = super(PostForm, self).save(commit = False)

 45         Object_Post.user = user

 46

 47         if commit:

 48             Object_Post.save()

 49

 50         return Object_Post

 51

 52 class CommentForm(forms.ModelForm):

 53     class Meta:

 54         model = Comment

 55

 56     def save(self, user, commit = True):

 57         Comment = super(CommentForm, self).save(commit = False)

 58         Comment.user = user

 59

 60         if commit:

 61             Comment.save()

 62

 63         return Comment

View:

 65 def create_post(request):

 66 ....

 67 #   

 68 #   Manually set number of comment fields for now

 69     commentfields = 1

 70

 71     if request.method == "POST":

 72         pform = PostForm(request.POST, instance=Object_Post())

 73 #        

 74         cforms = [CommentForm(request.POST, prefix=str(x), instance=Comment()) for x in range(0,Commentfields)]

 75         if pform.is_valid() and all([cf.is_valid() for cf in cforms]):

 76 #        

 77             new_post = pform.save()

 78             for cf in cforms:

 79                 new_Comment = cf.save(commit=False)

 80                 new_Comment.Object_Post = new_post

 81                 new_Comment.save()

 82             return HttpResponseRedirect(reverse('blogtut.views.dashboard'))

 83     else:

 84         pform = PostForm(instance=Object_Post())

 85         cforms = [CommentForm(prefix=str(x), instance=Comment()) for x in range(0,Commentfields)]

 86         return render_to_response('create_object.html', {'Post_Form': pform, 'Comment_Form': cforms},

 87             context_instance=RequestContext(request)

 88         )

Template:

  1 {% extends "base.html" %}

  2

  3 {% block content %}

  4 <dl>

  5

# Irrelevent to the form.

 11

 12 </dl>

 13

 14 <form action="{% url blogtut.views.create_post %}" method="post" accept-ch>

 15     {% csrf_token %}

 16     {{ form.as_p }}

 17

 18     Enter a name and description for the post: </br>

 19     {{ Post_Form }} </br>

 20     Enter one or more Comments:</br>

 21     {% for mform in Comment_Form %}

 22     Comment: {{ cform }}</br>

 23     {% endfor %}

 24 ....

 25     <p><input type="submit" value="Create Now"/></p>

 26 </form>

 27

 28 {% endblock %}

~

I'd really appreciate any help here as i've been hitting my head against this for a week or so now, would particularly appreciate examples as my python/django skills are novice and it'll help me understand.

Thanks for your time/help!

Jason

[pnich...@gmail.com]

Hey Jason--

You defined the save method as needing the user parameter, but you don't pass that in.  Try that (assuming user should equal request.user).  Good luck!

-Paul

[Jason S]

Hi Paul,

Thanks, now you mention it and I look at it again it seems obvious, can't see the wood for the trees moment.

Funnily enough I had that included at some point, but have made so many changes.

I'll try that tonight when I get home, thanks very much for the prompt reply!

Kind regards,

Jason

[Jason S]

Hi Paul,

After a bit more playing around I got it going, there was another unrelated issue with my code.

Learnt to use the debugging info more effectively in the process which is great.

Thanks again for your help, very much appreciated.

Kind regards,

Jason

On Thursday, 7 November 2013 04:56:14 UTC-10, pnich...@gmail.com wrote: