I want to populate two foreign key fields in one of my forms. The relevant bit of code is as below:
if request.method == 'POST':
form = IssuesForm(request.POST or None)
if request.method == 'POST' and form.is_valid():
form.save()
else:
form = IssuesForm(initial={'vehicle': stock_number, 'addedBy': request.user, })
vehicle points to the Vehicle class. addedBy is to contain the currently logged in user.
However the drop downs aren't initialized as I want...I still have to select the vehicle and user. From this I have two questions:
What could be the problem?
What is the best way to make these forms read-only?
EDIT 1
The IssueForm class looks like this so far:
class Issues(models.Model):
vehicle = models.ForeignKey(Vehicle)
description = models.CharField('Issue Description', max_length=30,)
type = models.CharField(max_length=10, default='Other', choices=ISSUE_CHOICES)
status = models.CharField(max_length=12, default='Pending',
choices=ISSUE_STATUS_CHOICES)
priority = models.IntegerField(default='8', editable=False)
addedBy = models.ForeignKey(User, related_name='added_by')
assignedTo = models.CharField(max_length=30, default='Unassigned')
dateTimeAdded = models.DateTimeField('Added On', default=datetime.today,
editable=False)
def __unicode__(self):
return self.description
Form Class
class IssuesForm(ModelForm):
class Meta:
model = Issues
exclude = ('assignedTo')
For your second question, are you wanting to make the addedBy field read-only? If so, don't add it to your form (it'll never be read-only if you present it to the user, e.g. Firebug). You can instead populate it inside your save method.
if request.method == 'POST':
form = IssuesForm(request.POST or None)
if request.method == 'POST' and form.is_valid():
issue = form.save(commit=False)
issue.addedBy = request.user
# any other read only data goes here
issue.save()
else:
form = IssuesForm(initial={'vehicle': stock_number}) # this is related to your first question, which I'm not sure about until seeing the form code
To make a form read only: on your form class, overwrite the __init__method to disable html fields:
def __init__(self, *args, **kwargs):
super(IssuesForm, self).__init__(*args, **kwargs)
for key in self.fields.keys():
self.fields[key].widget.attrs = {'disabled': 'disabled'}
Makes sure you also don't listen for POST requests, if so, don't save the form.
You can further customize the __init__method to take some arguments and set fields to these values after the super method has been called.
Related
I'm creating a questionnaire / survey, and have two forms (Model Form) built on the same model. These forms are called on separate views, but when saved they appear as separate users in the database. I'm not sure how to get them so save as the same user, I am already using the ' post = form.save(commit=False), post.user = request.user, post.save()' method to save the forms.
EDIT: Added in an attempt to save to the same instance
Model:
class QuizTakers(models.Model):
user = models.ForeignKey(User, on_delete=models.CASCADE)
industry_choices = (
(1, 'Service'),
(2, 'Hospitality'),
(3, 'Wholesale/Retail'),
(4, 'Manufacturing'),
(5, 'Agriculture')
)
industry = MultiSelectField(choices=industry_choices, max_length=1, max_choices=1)
company_name = models.CharField( max_length=100)
email = models.EmailField(blank=True)
score = models.FloatField(default=0)
completed = models.BooleanField(default=False)
timestamp = models.DateTimeField(auto_now_add=True)
def __str__(self):
return self.company_name
Forms:
# Form for getting company name
class QuizTakerForm(forms.ModelForm):
class Meta:
model = QuizTakers
fields = ['company_name']
# Form for getting company industry
class QTIndustryForm(forms.ModelForm):
class Meta:
model = QuizTakers
fields = ['industry']
Views:
# view for getting company name
def start(request):
if request.method == 'POST':
# create a form instance and populate it with data from the request:
form = QuizTakerForm(request.POST)
# check whether it's valid:
if form.is_valid():
# process the data in form.cleaned_data as required
request.session['company_name'] = form.cleaned_data['company_name']
post = form.save(commit=False)
post.user = request.user
post.save()
# redirect to a new URL:
return HttpResponseRedirect('industry/')
# if a GET (or any other method) we'll create a blank form
else:
form = QuizTakerForm()
return render(request, 'ImpactCheck/start.html', {'form': form})
# view for getting industry
class IndustryView(FormView):
template_name = 'ImpactCheck/industry.html'
form_class = QTIndustryForm
success_url = '1/'
def get(self, request):
company_name = request.session['company_name']
this_user=QuizTakers.objects.filter(company_name=company_name).order_by('-timestamp').first()
form=self.form_class(instance=this_user)
company_name = request.session['company_name']
return render(request, 'ImpactCheck/industry.html', {'form': form, 'company_name': company_name})
def form_valid(self, form):
# This method is called when valid form data has been POSTed.
# It should return an HttpResponse.
post = form.save(commit=False)
post.user = self.request.user
post.save()
return HttpResponseRedirect('/1')
Firstly, in your def start(request) function, you should consider adding the ID to request.session instead of the company name. Something along the lines of
def start(request):
if request.method == 'POST':
# create a form instance and populate it with data from the request:
form = QuizTakerForm(request.POST)
# check whether it's valid:
if form.is_valid():
# process the data in form.cleaned_data as required
form.instance.user=request.user
form.save()
request.session['obj_id'] = post.id
# redirect to a new URL:
return HttpResponseRedirect('industry/')
Now you can use that id to get both the name of your company, as well as the object.
In your IndustryView(FormView), if you're having trouble with the form instances, it's better to use UpdateView instead of the FormView (Be sure to import UpdateView first)
class IndustryView(UpdateView):
template_name = 'ImpactCheck/industry.html'
model = QuizTakers
fields = ['industry']
success_url = '/1'
def get_object(self):
return QuizTakers.objects.get(pk=self.request.session.get('obj_id'))
def get_context_data(self, **kwargs):
ctx = super().get_context_data(**kwargs)
ctx['company_name'] = QuizTakers.objects.get(pk=self.request.session.get('obj_id'))
return ctx
We use the get_context_data method since you need the company_name in your template. The get_object method in this view, tells django which object is to be updated. By default, it grabs the pk from the url (as a url parameter). But since we store our id in the session, we need to explicitly define this function.
Also, since we switched to UpdateView, you no longer need the QTIndustryForm either.
I am trying to create a form where one field is a ModelChoicefield. Im trying to populate that field with objects from a different model. I have ran into a problem as i need to get the current logged user within the form to filter the queryset. Here are the 2 models
class UserExercises(models.Model):
user = models.ForeignKey(User, on_delete=models.CASCADE)
name = models.CharField(max_length=50)
Muscle = models.ForeignKey(Muscle, on_delete=models.CASCADE)
class Exercise(models.Model):
exercise = models.ForeignKey(UserExercises, on_delete=models.CASCADE)
weight = models.DecimalField(max_digits=6, decimal_places=3)
reps = models.PositiveIntegerField(validators=[MaxValueValidator(100)])
difficulty = models.CharField(max_length=30)
date = models.DateTimeField(default=timezone.now)
user = models.ForeignKey(User, on_delete=models.CASCADE)
And here is my form
class AddExerciseForm(forms.Form):
exercise = forms.ModelChoiceField(queryset=UserExercises.objects.filter(user=1))
class Meta:
model = Exercise
fields = ['exercise', 'weight', 'reps', 'difficulty']
As you can see i am currently hard coding a filter in the ModelChoiceField, but want to replace that with the current users Id. Is there anyway of Going about this. Im new to django so any help would be Appreciated.
My View
#login_required
def add_exercise_view(request):
if request.method == 'POST':
user_id = request.user.id
form = AddExerciseForm(user_id=user_id)
if form.is_valid():
form.save()
return redirect('myfit-home')
else:
form = AddExerciseForm()
return render(request, 'users/register.html', {'form': form})
Firstly, AddExerciseForm should extend forms.ModelForm.
To initialize form data based on some paramater, you can override __init_ method of ModelForm to update form fields (that field is exercise in this case) based on some argument/parameter (which is user_id in this case).
class AddExerciseForm(forms.ModelForm):
class Meta:
model = Exercise
fields = ['exercise', 'weight', 'reps', 'difficulty']
def __init__(self, *args, **kwargs):
user_id = kwargs.pop('user_id', None)
super(AddExerciseForm, self).__init__(*args, **kwargs)
if user_id is not None:
# update queryset for exercise field
self.fields['exercise'].queryset = UserExercises.objects.filter(user=user_id)
else:
# UserExercises.objects.none() will return an empty queryset
self.fields['exercise'].queryset = UserExercises.objects.none()
And pass the user_id while initializing the form in view:
if request.user.is_authenticated():
# get user id
user_id = request.user
form = AddExerciseForm(user_id=user_id)
override __init__ method of the Form, and pass the user as argument
def __init__(self,user,*args, **kwargs):
self.user = user
super().__init__(*args, **kwargs)
self.fields['exercise'].queryset=
UserExercises.objects.filter(user=self.user))
self.fields['exercise'].widget = forms.CheckboxSelectMultiple
class Meta:
model = Exercise
fields = ['exercise', 'weight', 'reps', 'difficulty']
I've been struggling with this issue all day and hope someone can help.
I have all my hierarchies classified by category in the same table.
during the form creation, I want to separate each hierarchy by category and render it using a ModelMutipleChoiceField his way not all hierarchies are displayed together.
The problem comes when the form is submitted, as I need to go through each ModelMutipleChoiceField field and get the selected values and copy these to the model field before saving the form. however, I am not able to iterate through the ModelMutipleChoiceField and get the selected values. I also don't know how to set these values on the ModelField
NOTE: The number of hierarchies can vary.
here is my code:
I'm using Django MPTT and create my hierarchy structure using 2 models.
one is the category(Hierarchy) and the other is the nodes of the hierarchy (HierarchyNode_MPTT).
Then I created a separate model that has ManyToManyField pointing to the HierarchyNode_MPTT.
Models.py
class Hierarchy(models.Model):
ID = kp.ObjectIDField()
name = kp.ObjectNameField()
ext_hierarchy = kp.ObjectTechnicalID()
seq_no = kp.SeqNoField(unique=True)
mptt_seq_no = models.PositiveIntegerField()
class HierarchyNode_MPTT(MPTTModel):
id = kp.ObjectIDField()
name = kp.ObjectNameField()
description = kp.ObjectDescriptionField()
ext_node_id = kp.ObjectShortNameField()
parent = TreeForeignKey('self', on_delete=models.CASCADE, null=True, blank=True, related_name='children')
hierarchy = models.ForeignKey(Hierarchy, on_delete=models.CASCADE, null=True, blank=True, related_name='children')
class Configuration(models.Model):
uuid = kp.ObjectIDField()
name = kp.ObjectNameField()
description = kp.ObjectDescriptionField()
hierarchy_nodes = models.ManyToManyField(HierarchyNode_MPTT)
Then I created the form and implement the init method to automatically create as many hierarchies as I need.
form.py
class ConfigurationCreateForm(forms.ModelForm):
class Meta:
model = ForecastConfiguration
exclude = ['uuid', 'hierarchy_nodes']
def __init__(self, user, *args, **kwargs):
super().__init__(*args, **kwargs)
hierarchies = Hierarchy.objects.all()
for hierarchy in hierarchies:
field_name = 'hierarchy_%s' % (hierarchy.mptt_seq_no,)
self.fields[field_name] = TreeNodeMultipleChoiceField(queryset=HierarchyNode_MPTT.objects.all().filter(hierarchy=hierarchy),label=hierarchy.name, required=True)
try:
self.initial[field_name] = HierarchyNode_MPTT.objects.root_node(tree_id=hierarchy.mptt_seq_no)
except IndexError:
self.initial[field_name] = ''
def copy_hierarchies(self, *args, **kwargs):
hierarchies = Hierarchy.objects.all()
choice_list = list()
for hierarchy in hierarchies:
field_name = 'hierarchy_%s' % (hierarchy.mptt_seq_no,)
selected_values = self.cleaned_data.get(field_name)
for selection in selected_values:
choice_list.append(selection)
self.initial['hierarchy_nodes'] = choice_list
Finally, the idea was to implement the post method on the View to loop over the created hierarchies and then assign the value to the model field called 'hierarchy_nodes'
view.py
class ConfigurationCreateView(CreateView):
model = Configuration
form_class = ConfigurationCreateForm
template_name = 'frontend/base/config_create.html'
def get(self, request, *args, **kwargs):
form = ConfigurationCreateForm(user=request.user)
return render(request, self.template_name, {'form': form})
def post(self, request, *args, **kwargs):
form = self.form_class(request.POST)
form.copy_hierarchies(*args, **kwargs)
if form.is_valid():
fcc_form = form.save(commit=True)
messages.add_message(self.request, messages.INFO, 'Your Forecast Configurations has been saved')
return redirect(reverse('planning_detail', kwargs={'uuid': self.fcc_form.uuid}))
else:
messages.add_message(self.request, messages.ERROR, 'Error when creating the Forecast Configuration')
return render(request, self.template_name, {'form': form})
As you can see I created a method in my form called copy_hierarchies which is where I was planning to copy the hierarchy values, this is the method where I'm having problems.
if there is an easier way to perform this using Javascript, I'm open to these options.
Thanks in advance.
I wasn't able to solve this using multi-choice field, however, the following is the solution for a ChoiceField (single selection)
1) Changed my view.py post method to save the object.
2) After the model is saved I loop over the request input filed and append the values to the created instance.
3) Save the instance.
4) delete my copy_hierarchies method in forms.py
here is the code snippet created in views.py
def post(self, request, *args, **kwargs):
form = self.form_class(request.POST)
if form.is_valid():
fcc = form.save()
for key in self.request.POST:
# check only the ones w/ 'hierarchy_#'
if key.startswith('hierarchy_'):
# get form field object
id = self.request.POST[key]
node = HierarchyNode_MPTT.objects.get(id=id)
# add to object instance
fcc.hierarchy_nodes.add(node)
fcc.save()
I've a modelform and I excluded two fields, the create_date and the created_by fields. Now I get the "Not Null" error when using the save() method because the created_by is empty.
I've tried to add the user id to the form before the save() method like this: form.cleaned_data['created_by'] = 1 and form.cleaned_data['created_by_id'] = 1. But none of this works.
Can someone explain to me how I can 'add' additional stuff to the submitted modelform so that it will save?
class Location(models.Model):
name = models.CharField(max_length = 100)
created_by = models.ForeignKey(User)
create_date = models.DateTimeField(auto_now=True)
class LocationForm(forms.ModelForm):
class Meta:
model = Location
exclude = ('created_by', 'create_date', )
Since you have excluded the fields created_by and create_date in your form, trying to assign them through form.cleaned_data does not make any sense.
Here is what you can do:
If you have a view, you can simply use form.save(commit=False) and then set the value of created_by
def my_view(request):
if request.method == "POST":
form = LocationForm(request.POST)
if form.is_valid():
obj = form.save(commit=False)
obj.created_by = request.user
obj.save()
...
...
`
If you are using the Admin, you can override the save_model() method to get the desired result.
class LocationAdmin(admin.ModelAdmin):
def save_model(self, request, obj, form, change):
obj.created_by = request.user
obj.save()
Pass a user as a parameter to form constructor, then use it to set created_by field of a model instance:
def add_location(request):
...
form = LocationForm(user=request.user)
...
class LocationForm(forms.ModelForm):
def __init__(self, *args, **kwargs):
user = kwargs.pop('user')
super(forms.ModelForm, self).__init__(*args, **kwargs)
self.instance.created_by = user
The correct solution is to pass an instance of the object with pre-filled fields to the model form's constructor. That way the fields will be populated at validation time. Assigning values after form.save() may result in validation errors if fields are required.
LocationForm(request.POST or None, instance=Location(
created_by=request.user,
create_date=datetime.now(),
))
Notice that instance is an unsaved object, so the id will not be assigned until form saves it.
One way to do this is by using form.save(commit=False) (doc)
That will return an object instance of the model class without committing it to the database.
So, your processing might look something like this:
form = some_form(request.POST)
location = form.save(commit=False)
user = User(pk=1)
location.created_by = user
location.create_date = datetime.now()
location.save()
I don't know if I'm approaching the problem in the right way. The intended outcome is to have a form that displays only name and description. Once the user submits the form I want to add the current user as owner and check if there's already an entry that has the same name and user. If there is, I want to return the form with errors. If not, I want to save Status.
My model:
class Status(models.Model):
name = models.CharField(max_length=100)
description = models.TextField(blank=True)
owner = models.ForeignKey(User)
active = models.BooleanField(default=True)
class Meta:
unique_together = ('name','owner')
My View:
def settings_status(request):
status_form = StatusForm()
if request.method == 'POST':
status_form = StatusForm(request.POST)
if status_form.is_valid():
new_status = Status()
new_status.name = status_form.cleaned_data['name']
new_status.description = status_form.cleaned_data['description']
new_status.owner = request.user
new_status.save()
return render_to_response('base/settings_status.html',{
'status_form' : status_form,
}, context_instance=RequestContext(request))
I have tried numerous things, but I keep running into the problem that if I add owner to the object separately then it isn't available to the model's clean function and therefore can't be used to check if name and owner are unique.
Several ways to do this:
for example, passing in the user (owner) to the form:
forms.py:
class StatusForm(forms.Form):
def __init__(self, *args, **kwargs):
self.user = kwargs.pop('user','')
super(StatusForm, self).__init__(*args, **kwargs)
self.fields['name'] = forms.CharField(label='Name')
self.fields['description'] = CharField(label='Description', widget=forms.Textarea)
def clean(self):
cleaned_data = self.cleaned_data
name = cleaned_data.get('name')
if Status.objects.filter(name=name, owner=self.user).exists():
self._errors['name'] self.error_class(['Status with this name exists'])
return cleaned_data
views.py:
def settings_status(request):
if request.method == 'POST':
status_form = StatusForm(request.POST, user=request.user)
if status_form.is_valid():
new_status = Status()
new_status.name = status_form.cleaned_data['name']
new_status.description = status_form.cleaned_data['description']
new_status.owner = request.user
new_status.save()
else:
status_form = StatusForm(user=request.user)
context = {'status_form':status_form,}
return render_to_response('base/settings_status.html', context,
context_instance=RequestContext(request))
Also look at setting initial data depending on your form setup and consider using a ModelForm.