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multiple model form with image

Author:
lawgon
Posted:
November 14, 2007
Language:
Python
Version:
.96
Tags:
newforms imagefield
Score:
0 (after 2 ratings)

You have two models, one of which also has an image field. You want to get the data into a form and edit it. This also requires showing the url of the image, if there is one, on the form. This is a complete working example. No big deal, but for newbies, a complete working example could be valuable.

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Models:

class Delegate(models.Model):
    username = models.ForeignKey(User,
                                                        verbose_name=_("User Name"),unique=True)
    resume = models.TextField(_("Resume"),blank=True,null=True)
    location = models.TextField(_("City/Organisation"),blank=True,null=True)
    occupation = models.ForeignKey(Occupation,blank=True,null=True,
                                                                verbose_name = _("Occupation"))
    photo = ImageField(_("Photo"),upload_to="delphotos/",
                                                                    blank=True,null=True)
    class Admin:
        pass
    def __unicode__(self):
            return _(u"Username: %s") %(self.username)

View:

class Edituserform(forms.Form):
    def __init__(self, *args, **kwargs):
            super(Edituserform, self).__init__(*args, **kwargs)
            # Generate choices
            self.fields['occupation'].choices = [(chld.id, 
            chld.name) for chld in Occupation.objects.all()]
 
    first_name = forms.CharField(max_length=30,
                                            label=_("First Name or Initials"),
                                            required=False)
    last_name = forms.CharField(max_length=30,
                                            label=_("Last Name"),
                                            required=False)
    occupation = forms.ChoiceField(label=_("Occupation"),
                                            choices=(),
                                            required=False)
    photo = forms.ImageField(label=_("Photo"),
                                            required=False)
    resume = forms.CharField(max_length=1000,
                                            label=_("Resume"),
                                            widget=forms.Textarea,
                                            required=False)
    location = forms.CharField(max_length=1000,
                                            label=_("City/Organisation"),
                                            widget=forms.Textarea,
                                            required=False)
    pass1 = forms.CharField(max_length=50,widget=forms.PasswordInput,
                                            label=_("Enter New Password"),
                                            required=False)
    pass2 = forms.CharField(max_length=50,widget=forms.PasswordInput,
                                            label=_("Enter New Password Again"),
                                            required=False)
    # Hidden fields to store the url of photo for display
    flname = forms.CharField(max_length=250,widget=forms.HiddenInput,
                                            label='',
                                            required=False)
    flurl = forms.CharField(max_length=250,widget=forms.HiddenInput,
                                            label='',
                                            required=False)
    def clean_pass2(self):
        if self.cleaned_data['pass1'] != self.cleaned_data['pass2']:
                raise forms.ValidationError('Passwords do not match')
        else:
            if len(self.cleaned_data['pass1']) < 6 and len(self.cleaned_data['pass1']) >0:
                raise forms.ValidationError('Password must be at\
            least 6 letters long')
            
            
@user_passes_test(lambda u: u.is_anonymous()==False ,login_url="/web/login/")    
def edituser(request):
    """view to edit a user's profile - this is saved in User and Delegate
        """
    if request.POST:
        form = Edituserform(request.POST,request.FILES)
        if form.is_valid():
                fm = form.cleaned_data
                newuser = User.objects.get(pk=request.user.id)
                newuser.first_name = fm['first_name']
                newuser.last_name = fm['last_name']
                if fm.get('pass1') and fm.get('pass2'):
                    newuser.set_password(fm['pass1'])
                newuser.save()
                changed = False
                newdel,created = Delegate.objects.get_or_create(username=request.user)
                newdel.resume = fm['resume']
                changed = True
                newdel.occupation_id= int(fm['occupation'])
                changed = True
                newdel.location = fm['location']
                changed = True
                newdel.save()
                if request.FILES:
                    # Delete the old photo
                    pat = settings.MEDIA_ROOT+request.POST['flname']
                    try:
                        os.unlink(pat)
                    except:
                        pass
                    newdel.save_photo_file(request.FILES['photo']['filename'],
                                                                request.FILES['photo']['content'])
                return HttpResponseRedirect("/web/" )
    else:
        try:
            id = request.user.id
            usr = User.objects.get(pk=id)
            data = {
                            'username': usr.username,
                            'first_name':usr.first_name,
                            'last_name': usr.last_name
                            }
            a = Delegate.objects.get(username=request.user)
            data['resume'] = a.resume
            data['occupation'] = a.occupation.id
            data['location'] = a.location
            pat = settings.MEDIA_ROOT+a.photo
            filedt = open(pat,'r')
            filedata = {
                                'photo':  {'filename': a.get_photo_url(),'content': filedt.read()}
                                    }
            try:
                data['flname'] = a.photo
                data['flurl'] = a.get_photo_url()
            except:
                pass
            form = Edituserform(data,filedata)
        except:
            form = Edituserform(data)
    return render_to_response("web/edituser.html",
                              {'form':form,
                               'request':request,
                               })

Template:

{% extends "base.html" %}
{% load i18n %}
{% block centercontent %}
<h2>{% trans "Edit  profile for user:" %} {{ form.data.username }}</h2>
<p>{% trans "Edit your profile here. You can also change your password if you want" %}</p>
<p>{% if form.errors %} Please correct the errors below {% endif %}</p>
<form enctype="multipart/form-data" method="POST" action=".">
<dl>
{% for field in form %}

    <dt>{{ field.label_tag }}</dt>

{% ifequal field.name 'photo' %}
    <a href="{{ form.data.flurl }}">{{ form.data.flname }}</a></dd>
{% endifequal %}
    <dd>{{ field }}</dd>
    {% if field.help_text %}<dd>{{ field.help_text }}</dd>{% endif %}
    {% if field.errors %}<dd>{{ field.errors }}</dd>{% endif %}
{% endfor %}
</dl>
<input type="submit" name="Register" value="{% trans "Submit" %}"></p>
</form>
{% endblock %}

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