I am trying to create a comments application to use it everywhere where I need it, so I geuss I have to use ContentType to attach comments to different models of my project.
so here:
my model:
class Comment(models.Model):
user = models.ForeignKey(User, blank=True, null=True)
text = models.TextField((u'Текст комментария'))
content_type = models.ForeignKey(ContentType)
object_id = models.PositiveIntegerField()
content_object = generic.GenericForeignKey('content_type', 'object_id')
my view:
def add_comment(request):
if request.method == 'POST':
form = CommentForm(request.POST)
if form.is_valid():
new_comment = Comment()
new_comment.text = request.POST['text']
new_comment.content_type = ???
new_comment.object_id = request.POST['object_id']
new_comment.user = request.user
new_comment.save()
return HttpResponseRedirect(request.META['HTTP_REFERER'])
else: ...
How can I get a content type of the current model I am working with?
I have app NEWS and model Post in it, so I want to comments my Posts.
I know I can use ContentType.objects.get(app_label="news", model="post"), but I am getting exact value, so in that way my comment app will not be multipurpose.
P.S. sorry for bad English.
Check django.contrib.comments.forms.CommentForm.get_comment_create_data: It returns a mapping to be used to create an unsaved comment instance:
return dict(
content_type = ContentType.objects.get_for_model(self.target_object),
object_pk = force_unicode(self.target_object._get_pk_val()),
user_name = self.cleaned_data["name"],
user_email = self.cleaned_data["email"],
user_url = self.cleaned_data["url"],
comment = self.cleaned_data["comment"],
submit_date = datetime.datetime.now(),
site_id = settings.SITE_ID,
is_public = True,
is_removed = False,
)
So I guess that the line your are looking for is:
content_type = ContentType.objects.get_for_model(self.target_object),
Remenber, self is the form instance, and self.target_object() returns the instance that the current comment is attached to.
Related
i was able to post the image but don't know why i am not able to update the image , i am using default form provided by DRF
i did not find any solutions yet for this one
i am uploading image via cloudinary api
the error
{
"image_1": [
"The submitted data was not a file. Check the encoding type on the form."
],
"image_2": [
"The submitted data was not a file. Check the encoding type on the form."
]
}
Model:
class MyDetail(models.Model):
name=models.CharField(max_length=50, null=True, blank=True)
image_1=models.URLField(null=True, blank=True)
image_2=models.URLField(null=True, blank=True)
Views:
class SingleDetailView(generics.RetrieveUpdateDestroyAPIView):
queryset=MyDetail.objects.all()
serializer_class = SingleDetailSerializer
lookup_field='id'
def update(self, request, *args, **kwargs):
instance = self.get_object()
image_1 = request.FILES.get('image_1',None)
image_2 = request.FILES.get('image_2',None)
if image_1:
uploaded_image_1 = cloudinary.uploader.upload(image_1)
request.data['image_1'] = uploaded_image_1['secure_url']
if image_2:
uploaded_image_2 = cloudinary.uploader.upload(image_2)
request.data['image_2'] = uploaded_image_2['secure_url']
serializer = self.get_serializer(instance, data=request.data, partial=True)
serializer.is_valid(raise_exception=True)
self.perform_update(serializer)
return Response({"message": "Updated successfully.", "data": serializer.data})
def perform_update(self, serializer):
serializer.save()
serializer:
class SingleDetailSerializer(serializers.ModelSerializer):
image_1 = serializers.ImageField(max_length=None,use_url=True,required=False)
image_2 = serializers.ImageField (max_length=None,use_url=True,required=False)
class Meta:
model = MyDetail
fields = ['id','name','image_1','image_2']
def to_representation(self, instance):
representation = super().to_representation(instance)
representation['image_1'] = instance.image_1
representation['image_2'] = instance.image_2
return representation
my DRF Form image
i even tried from my react form but it was still not working , i was not able to find solutions online and i don't know why it is not able to recognize the file though i uploaded the file. Help me to fix this
Here is how i solved it
Instead of updating image through views , i updated image directly serializer where i modified the url field to image field to upload the image
views :
class SingleDetailView(generics.RetrieveUpdateDestroyAPIView):
queryset=MyDetail.objects.all()
serializer_class = SingleDetailSerializer
lookup_field='id'
serializer :
class SingleDetailSerializer(serializers.ModelSerializer):
image_1 = serializers.ImageField(use_url=True, required=False)
image_2 = serializers.ImageField(use_url=True, required=False)
class Meta:
model = MyDetail
fields = ['id','name','image_1','image_2']
def to_representation(self, instance):
representation = super().to_representation(instance)
representation['image_1'] = instance.image_1
representation['image_2'] = instance.image_2
return representation
def update(self, instance, validated_data):
image_1 = validated_data.get('image_1',None)
image_2 = validated_data.get('image_2',None)
if image_1:
uploaded_image_1 = cloudinary.uploader.upload(image_1)
validated_data['image_1'] = uploaded_image_1['secure_url']
if image_2:
uploaded_image_2 = cloudinary.uploader.upload(image_2)
validated_data['image_2'] = uploaded_image_2['secure_url']
instance = super().update(instance, validated_data)
return instance
Am trying to write update view,but got an error please help me to find the problem,thanks :)
At first I have many to many field in my model.It is my model
class Portfolio(models.Model):
name = models.CharField(max_length=50, unique=True, blank=False, null=True)
market = models.ForeignKey(Market, on_delete=models.DO_NOTHING, related_name='market')
investor = models.ForeignKey('accounts.User', on_delete=models.DO_NOTHING, related_name='investor')
assets = models.ManyToManyField(Assets, related_name='assets')
def __str__(self):
return self.name
After that I have a serializer for my view:
class PortfolioSerializer(serializers.ModelSerializer):
class Meta:
model = Portfolio
fields = ['name', 'market', 'investor', 'assets']
And it's my view:
class PortfolioUpdateView(APIView):
serializer_class = PortfolioSerializer
def put(self, request, *args,):
data = request.data
portfo = Portfolio.objects.get(id=id)
print(portfo)
serilize = self.serializer_class(instance=request.user, data=request.POST)
if serilize.is_valid():
name = serilize.data['name']
market = Market.objects.get(pk=int(request.POST.get('market', '')))
assets = Assets.objects.get(pk=int(request.POST.get('assets', '')))
Portfolio.objects.update(name=name, market=market,
assets=assets,
)
return portfo
else:
pass
and at the end it is my error:
TypeError at /market/update/1
put() got an unexpected keyword argument 'id'
I found the answer by my self,because I needed to use id for get obj so I used request.data that is body's data of object include obj's id and added query-set method for getting the class objs
class PortfolioUpdateView(viewsets.ModelViewSet):
serializer_class = PortfolioSerializer
def get_queryset(self):
portfolio = Portfolio.objects.all()
return portfolio
def put(self, request, *args, **kwargs):
data = Portfolio.objects.get(id=request.data['id'])
update_portfolio = Portfolio.objects.update(name=data['name']
, market=Market.objects.get(pk=int(request.POST.get('market', ''))))
update_portfolio.save()
for asset in data['assets']:
asset_obj = Assets.objects.update(asset_name=asset['asset_name'])
update_portfolio.assets.add(asset_obj)
serializer = PortfolioSerializer(update_portfolio)
return Response(serializer.data)
And this is the URL
router.register("update", PortfolioUpdateView, basename="update")
Error: Could not parse rfc1738 URL from string. I tried everything, I think and I cannot solve it.
app.config['SQLALCHEMY_DATABASE_URI'] = 'C:/dev/FlaskBlog/blog.db'
db = SQLAlchemy(app)
class Blogpost(db.Model):
id = db.Column(db.Integer, primary_key=True)
title = db.Column(db.String(50))
subtitle = db.Column(db.String(50))
author = db.Column(db.String(20))
date_posted = db.Column(db.DateTime)
content = db.Column(db.Text)
Problem appears when I try to post an article.
Here is addpost route:
#app.route('/addpost', methods=['POST'])
def addpost():
if request.method == 'POST':
title = request.form['title']
subtitle = request.form['subtitle']
author = request.form['author']
content = request.form['content']
post = Blogpost(title=title, subtitle=subtitle, author=author, date_posted=datetime.now())
db.session.add(post)
db.session.commit()
return redirect(url_for('index'))
else:
return render_template('index.html')
There are no test files here, so I can not test.
But I have encountered the same error, and my database is SQLite. The following codes work fine for me:
from sqlalchemy import create_engine
# relative path on Linux: with three slashes
e = create_engine('sqlite:///relative/path/to/database.db')
# absolute path on Linux: with four slashes
e = create_engine('sqlite:////absolute/path/to/database.db')
# absolute path on Windows
e = create_engine('sqlite:///C:\\absolute\\path\\to\\database.db')
And in your case, I think you can change app.config['SQLALCHEMY_DATABASE_URI'] = 'C:/dev/FlaskBlog/blog.db' to app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///C:\\dev\\FlaskBlog\\blog.db'.
For detailed documents: SQLAlchemy 1.4 Documentation
The SQLALCHEMY_DATABASE_URI should be a valid db uri, fix that and it should work. I also struggled with the same problem.
I am struggling on how to connect URL_for links in my app.
I have a the basic skeleton app set up.
I wish to make a link to a function (that runs code) that is built in a view (MyView).
I essentially want to pass a variable (var1) to the view 'myview/method2/var1' and have that link showing in the ContactModelView.
Thanks
class MyView(BaseView):
route_base = "/myview"
#expose('/method2/<string:var1>')
#has_access
def fun_var(self, var1):
# go to function_file and run function with var1
param1, param2 = func_file.function(var1)
self.update_redirect()
return self.render_template('method3.html',
param1=param1,param2=param2, param3=prospects)
My models.py file has the following:
class Contact(Model):
id = Column(Integer, primary_key=True)
name = Column(String(150), unique = True, nullable=False)
var1 = Column(String(150))
contact_group_id = Column(Integer, ForeignKey('contact_group.id'))
contact_group = relationship("ContactGroup")
def prospect(self):
return Markup(
'prospect')
def __repr__(self):
return self.name
I then have in views:
class ContactModelView(ModelView):
datamodel = SQLAInterface(Contact)
label_columns = {'contact_group':'Contacts Group'}
list_columns = ['name','var1','contact_group', 'action']
show_fieldsets = [
(
'Summary',
{'fields':['name','var1','contact_group', 'prospect']}
)
]
In the documentation regarding BaseView, we see that
Its constructor will register your exposed urls on flask as a Blueprint
So make sure you add the view you created, in order to 'register the blueprint'. Use something like
appbuilder.add_view_no_menu(MyView())
You can run fabmanager list-views on the console to make sure your view was registered.
As your endpoint requires a var1 parameter, you have to provide that to url_for. Something like this will work:
class Contact(Model):
var1 = Column(String(150))
...
def prospect(self):
return Markup(
'prospect')
I've got a model that references another model via OneToOneField so that when you use Django's built-in delete_selected admin action, the associated model's data is not deleted. I'd like to write a custom admin action to delete the data in that associated model as well.
Here's my model:
class Party(models.Model):
TYPE_CHOICES=(
('P','Person'),
('O','Organization')
)
partyType = models.CharField(max_length=1, choices=TYPE_CHOICES)
name = models.CharField(max_length=100)
comment = models.CharField(max_length=500,blank=True)
accessIdCrossRef=models.IntegerField(blank=True, null=True)
mailingLists = models.ManyToManyField(MailingList)
inMainList=models.BooleanField(default=False)
inSubList=models.BooleanField(default=False)
class Meta:
db_table='party'
ordering=['name',]
def __unicode__(self):
return self.name
class Person(models.Model):
party = models.OneToOneField(Party, editable=False)
firstName=models.CharField(max_length=60)
lastName=models.CharField(max_length=60)
...
def save(self):
if None == self.party :
print 'Creating party for person'
p = Party()
p.partyType = 'P'
p.save()
self.party = p
# Get address to set party name used in list
city=""
state=""
postalCode=""
try:
partyAddress = PartyPostalAddress.objects.get(party=self.party)
address = partyAddress.postalAddress
city=address.city
state=address.state
postalCode=address.postalCode
except PartyPostalAddress.DoesNotExist:
pass
self.party.name = '%s, %s - %s, %s %s' %(self.lastName, self.firstName, city, state, postalCode)
self.party.save()
super(Person,self).save()
My assumption was to write a def delete() in my model like this:
def delete(self):
self.party.delete()
self.delete()
And an admin action like so:
class PersonAdmin(admin.ModelAdmin):
list_display = ('lastName','firstName')
search_fields = ('firstName', 'lastName')
actions=['really_delete_selected']
def get_actions(self, request):
actions = super(PersonAdmin, self).get_actions(request)
del actions['delete_selected']
return actions
def really_delete_selected(self, request, queryset):
for obj in queryset:
obj.delete()
if queryset.count() == 1:
message_bit = "1 person was"
else:
message_bit = "%s people were" % queryset.count()
self.message_user(request, "%s successfully deleted." % message_bit)
really_delete_selected.short_description = "Delete selected entries"
That deletes person.party and most of person, but throws an error because person's party OneToOneField is now empty. The specific error is:
"AssertionError at /admin/common/person/
Party object can't be deleted because its id attribute is set to None."
Any ideas? This, this, and this question are related, but only one of them utilizes the OneToOneField and he did that erroneously.
I am getting a feeling that it should be as simple as switching the sequence of deleting the two (unless you have tried this already). Since the person is associated with party, once you delete person, you cannot access party. Hence you should do
person.party.delete()
person.delete()
Got it cleaned up and working!
My model:
class Party(models.Model):
name = models.CharField(max_length=100)
...
class Person(models.Model):
party = models.OneToOneField(Party, editable=False)
firstName=models.CharField(max_length=60)
lastName=models.CharField(max_length=60)
def delete(self):
d = self.party.id
Party.objects.get(id__exact=d).delete()
My admin:
class PersonAdmin(admin.ModelAdmin):
actions=['really_delete_selected']
def get_actions(self, request):
actions = super(PersonAdmin, self).get_actions(request)
del actions['delete_selected']
return actions
def really_delete_selected(self, request, queryset):
for obj in queryset:
obj.delete()
if queryset.count() == 1:
message_bit = "1 person was"
else:
message_bit = "%s people were" % queryset.count()
self.message_user(request, "%s successfully deleted." % message_bit)
really_delete_selected.short_description = "Delete selected entries"
...