I have this code snippet in template.
<form method="POST" novalidate>
{% csrf_token %}
{{ form }}
{{ form2.as_p }}
<button type="submit" class="btn btn-secondary">Search</button>
</form>
And in forms.py there are two forms (not ModelForm, but only Form).
form searches data in first db and form2 search data in second db and displays the results. The second form has only one field and I'd like to have something like this in
a view.
if request.method == "POST":
if form.is_valid():
# extract data from the first db
if form2.is_valid()
# extract a few more data from the second db
The field in the second form is not required for the user to fill in. If the user fills it in the user gets only more data displayed.
I solved it partially with the novalidate in HTML. But what I'd like to have is the validation of the first form and the second form with its one form field can be empty.
Is there some django feature to achieve this result?
something like this?
<form method="POST">
{% csrf_token %}
{{ form.novalidate }}
{{ form2.as_p }}
<button type="submit" class="btn btn-secondary">Search</button>
</form>
Related
I am trying to implement a simple UpdateView, but I want to use my own template. Using djangos auto_population is working, but not what I want, because I have lots of fields formatted differently.
<form method="post" action="#">
{% csrf_token %}
{{ form.as_p }}
<input type="submit">
</form>
But I want to use my own form template which looks like this:
edit_template.html
<form class="form-horizontal" role="form" method="POST" action="{% url 'update' pk=abc %}">
{% csrf_token %}
<input name='varX' id="varX" type="text" placeholder="" class="form-class">
<input name='varY' id="varY" type="text" placeholder="" class="form-class">
</form>
views.py
class ModelUpdate(UpdateView):
model = MyModel
fields = ['varX','varY']
Now I would like that form to be populated with my object data, but the form is empty.
UpdateView is also passing the data twice to the template: One as 'object' and one as 'mymodel'.
I also tried updating
get_context_data
by adding
context.update( model_to_dict(myModelData))
But that also does not change anything.
How can I populate my custom form using djangos class-based views?
Try this:
def get_initial(self):
initial = super().get_initial()
initial['my_form_field1'] = self.request.something
return initial
Have a look at django-widget-tweaks, you first need to check for any non field errors and then loopt through the fields one by one.
https://simpleisbetterthancomplex.com/article/2017/08/19/how-to-render-django-form-manually.html
This article should cover just that
I am trying to access the values of a Bootstrap btn-group from Django and from the documentation I have found, it seems that you should use Forms in Django for such tasks.
This is what the html looks like, right now:
<div class="col-md-6">
{% for metric in metrics %}
<input name="{{ metric.name }}" type="hidden" value="0"/>
{% endfor %}
<div class="btn-group" data-toggle="buttons">
{% for metric in metrics %}
<button type="button" class="btn btn-default" data-checkbox-name="{{ metric.name }}">{{ metric.name }}</button>
{% endfor %}
</div>
</div>
How can I use forms to get the values of the input fields?
Here it is a basic example about using a form in django
views.py:
#login_required
def your_view(request): # Add this code into your view
if request.method == 'POST':
# So here you can do a loop over POST fields like this
data_list = [] # We will insert all the inputs in this array
for key in request.POST:
data_list.append(request.POST[key])
# Here you can manage the the data_list and do whatever you need
# The content of the data_list depend on your inputs
# It could be string, integer....
# YOUR VIEW CODE
template (form example):
<form action="." method="post" id="add_user_form">
{% csrf_token %}
{% for metric in metrics %}
<input type="text" name="{{ metric.name }}" placeholder="whatever you want">
{% endfor %}
<input type="submit" value="submit" class="default"/> # Submit button
</form>
{% csrf_token %} : You need to put this in every form you use
action="." : This make the post to the actual page
But anyway I strongly recommend you to check this Django Forms Documentation to unterstand better the logic, and also check the ModelForms because can save you a lot of time when you need to make a form for a model that exists in your Django Models
You are'n forced to use django forms, this is just a way to get a sort of organization.
in you views toy can get the values sent to the server by using request.GET or request.POST, depending of the method of the form.
to get a list of values you have received just do a
print request.POST
request.POST is a dictionary, so you can get any value fron them by its key:
print request.POST['<key>']
I am getting this error: ValidationError at /screen-many/
[u'ManagementForm data is missing or has been tampered with'] and I think it is due to the folling code in my view...
# e_pk_list is a list of id's that I got from POST
e_students = Student.objects.filter(pk__in=e_pk_list)
my_iterator = iter(e_students) # Each list item will correspond to a form.
SurveyFormset = formset_factory(SurveyForm, extra=len(e_students))
# Is this the tampering that I can't do??
SurveyFormset.form = staticmethod(curry(SurveyForm, item_iterator=my_iterator))
if request.method == 'POST':
survey_formset = SurveyFormset(request.POST)
if survey_formset.is_valid():
for form in survey_formset:
saved = form.save(commit=False)
saved.surveyset = ss
saved.save()
return HttpResponseRedirect('/')
else:
survey_formset = SurveyFormset()
Thanks
EDIT: I guess I should have mentioned that I already have a managementform in my template....
<form action="" method="POST">{% csrf_token %}
{{ survey_formset.management_form }}
{% for form in survey_formset %}
<div class="item">
{% crispy form %}
</div>
{% endfor %}
<input type="submit" value="Submit" class='button' />
</form>
Its seems that you didn't put management_form in your form .
Put this in your html form where your are displaying SurveyFormset
{{ SurveyFormset.management_form }}
A formset has many forms. Django keeps track of number of forms in formset using management form data. You should add management_form in the template too, which should be posted along with other POST data.
So, you should have:
<form method="POST" action=".">
{{survey_formset.management_form}}
{% comment %}Other form fields{% endcomment %}
</form>
Alright, here is what I want to do:
A user sees a number of assignments in a table, with each assignment paginated using paginator. A user can input a number in a field and click "go", he is then taken to the page.
Here's my code so far:
View:
def home(request):
if request.user.is_authenticated():
assignments = show_assignments(request)
form=GoToForm(request.POST or None)
if request.POST and form.is_valid():
form = form.cleaned_data
assignment = form["assignment"]
page = form["page"]
return HttpResponseRedirect("/coding/assignment/%i/?page=%i") % (assignment, page)
return render(request, 'account.html', {'assignments':assignments, 'form':form})
Template:
{% for assignment in assignments %}
<tr>
<td><a href="{% url 'coding:assignment' assignment.id %}">
{{ assignment.country }}: {{ assignment.start_date }} to {{ assignment.end_date }}</a></td>
<td>{{ assignment.finished_articles }} of {{ assignment.article_num}} articles finished </td>
<td>Start where I left off</td>
<td>
<form id="form" action="" method="post" accept-charset="utf-8">
{% csrf_token %}
Jump to page {{ form.page }}
<input type="hidden" name="" value="{{ assignment.id }}" id="id_assignment">
<input type="submit" value="Go">
</form>
</td>
</tr>
{% endfor %}
This isn't working.
Is this because I need to use formsets (because I have multiple GoToForms on one page), or is the HttpResponseRedirect not working?
If the GoToForm form class looks simple (e.g. it only has page field), then there's no need to use this form class at all. Just add form fields manually in template and validate them inside post view if needed.
Formset for this case would be overkill, unless you have a lot of input fields to work with.
Also remember to change id="form" to make it unique for each form or use class="form" instead.
I have a formset which i initialize it in view. one of the form's fields is FileField. and I have to show user the name of his/her previous file name. Because i can't initialize FileField, i want to send file names in list. (I mean for example when you have a Charfield, you can initialize it in views and when you render to template, you will see an input filled with that data, but when you have file upload field you can't filled it in views and sends to template). i don't know how i can loop over forms in formset and list at the same time. And the other thing is when i initialize forms in formset and render to template (I mean for example write data['form-0-Team']='team1' but i can't write data['form-0-Team']='a.png' , so when i render to template, i see field named 'Team' is filled (value=team1) and field named 'File' is not filled and the error 'thid field is required' id shown. ) although it's the first time i'm visiting this page and my method isn't POST. (USUALLY form errors are shown when user clicks on submit and in views it checks if request.method == 'POST', then checks if form.is_valid, it return to template and shows errors, but in mine, it shows errors at the first time euser is visiting the page and before he/she posts data).
I wish i could say my problem. can you please guide me solve this? really thanks.
def myFunc(request):
flagFormSet = formset_factory(FlagFileBaseForm)
if request.method == 'POST':
formset = flagFormSet(request.POST, request.FILES)
if formset.is_valid():
# do s.th
else:
data = {
'form-TOTAL_FORMS': 5,
'form-INITIAL_FORMS': u'0',
'form-MAX_NUM_FORMS': u'',
# add initial form data to it
}
list=['a.png', 'b.png', 'c.png', 'd.png' , 'f.png']
formset = flagFormSet(data)
return render_to_response('myPage.html', RequestContext(request, { 'formset': formset, 'list':list}))
and my template:
<form method="post" action="" enctype="multipart/form-data">
{{ formset.management_form }}
{% for form in formset.forms %}
<div class="form">
<div class="form-row Team">
<div>
<label class="required" for="id_Team">Team:</label>
{{ form.Team }}
{{ form.Team.errors }}
</div>
</div>
<div class="form-row File">
<div>
<label class="required" for="id_File">File:</label>
{{ form.File }}
{{ form.File.errors }}
</div>
#here i want show the name of previous file
</div>
</div>
{% endfor %}
</form>
EDIT:
current result (while request is not post, it shows error)
desired result (form without error with file names)
In Django Templates, if you are trying to render a form that has a FileField. You must pass replace
<form method="post" action="">
with
<form method="POST" enctype="multipart/form-data">
https://docs.djangoproject.com/en/dev/ref/forms/api/#binding-uploaded-files-to-a-form
I'm afraid I don't really understand your question, so apologies if this doesn't help..
If your list is arbitary (as it looks from your question), then you could use django's built in forloop counter to construct your file names -
{% for form in formset %}
{{ form }}
<input type="text" name="file_name" value="{% forloop.counter %}.png">
{% endfor %}
Alternatively have a look at python's zip function. You could use it to build an object that includes both the names and the forms and pass that to your template.