Django community: Django Q&A RSS
This page, updated regularly, aggregates Django Q&A from the Django community.
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Going fullstack with the following: Bootstrap, ReactJS, Django (Python)
I browsed around a lot here on stackoverflow and many other pages, blogs, articles. I am relatively new to web development, what I feel comfortable right now after a year investing are the web languages HTML, CSS, plain JS (currently on jQuery) and basic usage of Pyhton (currently trying to understand ajax - not as easy as thought initially... ). I found many topics regarding which framework is better than another and why not. My question however is, which frameworks suit best to fit in my current knowledge-base. To redefine this a bit more: What I want to do is, to create a neat, but basic site with bootstrap (status: check), and generate all different pages (about, contact, etc.) through the backend, not linking html files to each other as I do now [this is the missing link, which framework here? Which one is "easy to understand"]. If, one day, I am able to do so, I would like to render the html content through ReactJS. Could any of you recommend a framework that helps to organise couple of sites for easier site maintenance (flask? django? nodejs? non of this at all?). Feel free to refer to wrong associations in ... -
Django how to render dictionary in the template
i have this dictionary data={'user': user.username, 'punti_capitano': {'nome_capitano':team.capitano.display_name,'lista_punti':point_cap_list}, 'punti_rider2': {'nome_rider2':team.rider_2.display_name,'lista_punti':point_rider2_list}, 'punti_rider3': {'nome_rider3':team.rider_3.display_name,'lista_punti':point_rider3_list}, 'punti_rider4': {'nome_rider4':team.rider_4.display_name,'lista_punti':point_rider4_list}, 'punti_rider5': {'nome_rider5':team.rider_5.display_name,'lista_punti':point_rider5_list}, 'punti_rider6': {'nome_rider6':team.rider_6.display_name,'lista_punti':point_rider6_list}, 'punti_rider7': {'nome_rider7':team.rider_7.display_name,'lista_punti':point_rider7_list}, 'punti_rider8': {'nome_rider8':team.rider_8.display_name,'lista_punti':point_rider8_list}, 'punti_rider9': {'nome_rider9':team.rider_9.display_name,'lista_punti':point_rider9_list}, } how can i create a table with all these elements? -
Using a single form in the template to check the answers for multiple questions in django
Introduction I am trying to build a website with Django where the users can answer questions based on a particular topic. The Problem There is a model Question which holds the question along with the choices and the answer for the question. So if the topic is Food and there are 5 questions with the same topic in the database. Using pagination the questions are displayed in HTML (There's a single question per page). I am not able to figure out how to check for the answer for multiple questions submitted at the end of the quiz in the view when I am using just a single form in the template. Models.py class Question(models.Model): sl_num = models.IntegerField(blank=True) question = models.TextField(max_length=2000, blank=False) answer = models.CharField(max_length=500, blank=False) option_A = models.CharField(max_length=500, blank=False) option_B = models.CharField(max_length=500, blank=False) option_C = models.CharField(max_length=500, blank=False) option_D = models.CharField(max_length=500, blank=False) subject = models.CharField(max_length=100, blank=True) topic = models.CharField(max_length=100, blank=True) def __str__(self): return self.question The Template {% block body %} <h1>Questions for {{ exam }}</h1> <p><a href="#">Here are the questions</a></p> {% for question in questions_list %} <p>{{question.sl_num}}. {{ question.question }}</p> <form> <input type="radio" name="answer" value="{{ question.option_A }}"> {{ question.option_A }}<br> <input type="radio" name="answer" value="{{ question.option_B }}"> {{ question.option_B }}<br> <input type="radio" ... -
Query/Create an Notification system of User Actions, where hierarchical FK keys (as parent/owners) exist
I have the following Models: class Prod(models.Model): acc = models.ForeignKey(Acc,on_delete=models.CASCADE) class Acc(models.Model): user = models.OneToOneKey(User,on_delete=models.CASCADE) class Note(models.Model): action = models.CharField( max_length=35) sender = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE) receiver = models.ForeignKey(settings.AUTH_USER_MODEL, blank=True, null=True, on_delete=models.CASCADE) status = models.BooleanField(blank=True, null=True) class Item(models.Model): note = models.ForeignKey(Note, on_delete=models.CASCADE, ) user = models.ForeignKey(settings.AUTH_USER_MODEL, blank=True, null=True, on_delete=models.CASCADE) acc = models.ForeignKey(Acc, blank=True, null=True, on_delete=models.CASCADE) prod = models.ForeignKey(Prod, blank=True, null=True, on_delete=models.CASCADE) def save(self, *args, **kwargs): ...... Note.objects.filter(id=self.note_id).update(recipient=self.parent) In a utility/function I'm creating the instances of the Model above: note = Note.objects.create(action=action, sender=sender) transaction.on_commit(lambda: Item.objects.create(note=note,target=target) The issue that I have is that are situations when the 'same' Note is created again. I want to create a new Note, if a Note with the same action, receiver doesn't exist. In db: Item id | note_id | user_id | acc_id | prod_id 1 1 1 2 5 2 2 2 - - 3 3 2 3 - Note id | sender_id | receiver_id | action | status 1 1 1 c true 1 2 2 u null 1 3 2 c false If a new Note/ActionObject has: the same action status not True if prod_id exist, prod_id not to be the same if prod_id doesn't exist, but exist acc_id, acc_id not to be the ... -
Django download file set correct name
Right now I use the following function for downloading files: def download_xlsx(request): user = request.user file_name = request.GET['file_name'] file_path='main_app/static/xlsx/' + str(user.id) + '/' + file_name if os.path.exists(file_path): with open(file_path, 'rb') as fh: response = HttpResponse(fh.read(), content_type="application/vnd.ms-excel") response['Content-Disposition'] = "inline; filename=%s" % file_name return response Using the following url http://127.0.0.1:8000/download_xlsx?file_name=test.xlsx I downloaded file named 'download_xlsx' I tried to write something like this: response['Content-Disposition'] = "inline; filename='+ file_name But didn't help. How do I rename my file to file_name var ? -
Django: Getting models with apps.get_model on models.py
On circular import of Django Is their any way i can grab a model object with myModel = apps.get_model('app_name', 'model_name') inside models.py file ? I know i can use models.ForeignKey('app.model',....) But in my case i am making a query in the models.py for custom function. So that i need to grab the model object. Also can't import it in normal way as already imported this file class in the other file. So must be a circular import. This code myModel = apps.get_model('app_name', 'model_name') works fine on views.py but in models.py doesn't. Since according to django the all models.py get called after settings.py and after that views and others. so while trying to use get_model inside models.py getting this error File "/home/mypc/.virtualenvs/VSkillza/lib/python3.6/site-packages/django/apps/registry.py", line 132, in check_models_ready raise AppRegistryNotReady("Models aren't loaded yet.") django.core.exceptions.AppRegistryNotReady: Models aren't loaded yet. Thanks in advance :) -
Django SQLite view returns Empty Queryset []
Hi I'm new to Django / SQLite and i'm getting an empty qurty set when i read from a view. Other tables and views that i've created are behaving normally. when i use DB Browser for SQLite, I can see the data is there. #nmsdb_app.models.py class V_WSW_Table_People_Chooser(models.Model): Username = models.CharField(max_length=31) Record_ID = models.CharField(max_length=11) Display_Text = models.CharField(max_length=255) objects = UserManager() def __str__(self): return self.Username #stop django from trying to treat sql views as tables class Meta: managed = False python manage.py shell: from nmsdb_app.models import V_WSW_Table_People_Chooser V_WSW_Table_People_Chooser.objects.all() <QuerySet []> to make the view on the SQLite server: 1. do the model 2. makemigrations 3. migrate 4. drop the SQLIte table and replace with the view 5. add managed = False to the model class I've tried the Record_ID field as Text and Integer but it makes no difference. When i use DB Browser for SQLite, the view data appears correctly. Any help received with thanks. -
Django tenant how work with gunicorn and nginx?
I have a django application on my nginx server. I use gunicorn to run it. In my nginx.conf i set: location / { proxy_pass http://127.0.0.1:8000; proxy_set_header X-Forwarded-Host $server_name; proxy_set_header X-Real-IP $remote_addr; add_header P3P 'CP="ALL DSP COR PSAa PSDa OUR NOR ONL UNI COM NAV"'; } Well at this point i install django-tenant-schemas for manage tenants, i create my two tenants, 'public' for localhost e 'tenant1' for test.mydomain.com (with relative postgrees schemas) Now, in every case i reach my website django propose ever my public schema, wheter i reach it using mydomain.com or test.mydomain.com. Is because nginx use as location for / 127.0.0.1:8000 (localhost)? How can i use tenants correctly in my application? Thanks in advance -
Do I have to define var as Decimal?
I know, platform_fee_percentage will always be an decimal (called form the database). Is it necessary that I define Decimal explicitly, or will pyhton always give it the type Decimal? If not, the function quantize would fail. def calculate_application_fee(platform_fee_percentage, total_gross): calculate_application_fee = Decimal(platform_fee_percentage * total_gross) application_fee = quantize(calculate_application_fee, '1') return application_fee -
What should I test in a CreateView?
I'm currently writing some tests in Django. I have a CreateView which creates a new product. The product has fields like: Name Price Currency Start product sale at Description etc. I'm a bit confused what I should test here. I have a test_views.py file and a test_forms.py file Should I place tests like "Is the price greater than 0" and "Is the start date not in the past" in the test_views.py or in the test_forms.py or both? -
Wagtail add page between two existing pages
I'm using wagtail in a django application with a graphql interface. Wagtail is only the backend and I'm implementing an editor with vuejs and a graphql interface using graphene. I'd like to add a new page between two existing pages. The page order depends on the path parameter of the page. Is it possible to achieve this without manipulating the path param? I can change the path param of the pages in wagtail, but this seems to me to be error prone and not as the creators of wagtail intended to be done. -
Django "settings.DATABASES is improperly configured" and "ImproperlyConfigured at /i18n/setlang/"
I wrote a django web application and now I need to translate it to english. I followed the documentation but I keep getting this strange error: ImproperlyConfigured at /i18n/setlang/ settings.DATABASES is improperly configured. Please supply the ENGINE value. Check settings documentation for more details. Request Method: POST Request URL: http://192.92.149.139:8000/i18n/setlang/ Django Version: 2.0.3 Exception Type: ImproperlyConfigured Exception Value: settings.DATABASES is improperly configured. Please supply the ENGINE value. Check settings documentation for more details. Exception Location: /home/mwon/venvs/arquivo/lib/python3.6/site-packages/django/db/backends/dummy/base.py in complain, line 20 Python Executable: /home/mwon/venvs/arquivo/bin/python3.6 Python Version: 3.6.4 Python Path: ['/home/mwon/digitalocean/website_dev', '/home/mwon/venvs/arquivo/lib/python36.zip', '/home/mwon/venvs/arquivo/lib/python3.6', '/home/mwon/venvs/arquivo/lib/python3.6/lib-dynload', '/usr/lib/python3.6', '/home/mwon/venvs/arquivo/lib/python3.6/site-packages', '/home/mwon/venvs/arquivo/lib/python3.6/site-packages/django_styleguide-1.2.5-py3.6.egg', '/home/mwon/venvs/arquivo/lib/python3.6/site-packages/Markdown-2.6.11-py3.6.egg', '/home/mwon/venvs/arquivo/lib/python3.6/site-packages/bs4-0.0.1-py3.6.egg', '/home/mwon/venvs/arquivo/lib/python3.6/site-packages/beautifulsoup4-4.6.0-py3.6.egg', '/home/mwon/venvs/arquivo/lib/python3.6/site-packages/duc_preprocess-1.0-py3.6.egg', '/home/mwon/venvs/arquivo/lib/python3.6/site-packages/simple_cnlp-1.0-py3.6.egg', '/home/mwon/venvs/arquivo/lib/python3.6/site-packages/django_mongoengine-0.3-py3.6.egg'] Server time: Qua, 5 Set 2018 11:21:17 +0000 This is my urls.py: urlpatterns = [ path('i18n/',include('django.conf.urls.i18n')), ] urlpatterns += i18n_patterns( path('admin/',admin.site.urls), path('',include('arquivo.urls')), prefix_default_language = True ) and settings.py: LANGUAGE_CODE = 'pt' LANGUAGES = ( ('en', 'English'), ('pt', 'Portuguese'), ) USE_I18N = True LOCALE_PATHS = [ os.path.join(BASE_DIR,'locale') ] The translation seems to be working fine. The problem was when I included a form to select the language. I used the example code from documentation: {% load i18n %} <form action="{% url 'set_language' %}" method="post">{% csrf_token %} <input name="next" type="hidden" value="{{ redirect_to }}"> <select name="language"> {% get_current_language as LANGUAGE_CODE %} {% ... -
Mongoengine python3 Embedded Document has no attribute _is_document
I am creating my a document having a field as EmbeddedDocument using mongoengine. But I am getting the following error : AttributeError: 'EmbeddedDocument' object has no attribute '_is_document' Doing some reasearch I found that the code of mongoengine is written in python 2 and do make it work properly install it using pip3. Did the same still not working. class DataImportNodeInfo(EmbeddedDocument): provider_id = fields.IntField(required=False) carrier_name = fields.StringField(required=False) basepath = fields.StringField(required=False) log_tobe_imported = fields.ListField(required=False) class DataImportConnectionInfo(EmbeddedDocument): host = fields.StringField(required=True) user_login = fields.StringField(required=False) user_pwd = fields.StringField(required=False) class DataImportNode(DynamicDocument): # Meta variables meta = { 'collection': str(KonnectDAConstants.DATA_IMPORT_NODES) } cmd = fields.StringField(required=True) import_source = fields.StringField(required=True) import_type = fields.StringField(required=True) active = fields.BooleanField(required=True) info = fields.EmbeddedDocument(DataImportNodeInfo, required=True) connection = fields.EmbeddedDocument(DataImportConnectionInfo, required=True) AttributeError: 'EmbeddedDocument' object has no attribute '_is_document' -
how to compress the image before uploading to s3 in django?
I am working on an application where a user can upload an image. I want to reduce the size of the image in 200-500kb. This is my models.py file class Report_item(models.Model): owner = models.ForeignKey(settings.AUTH_USER_MODEL) title = models.CharField(max_length=255, help_text='*Title for the post e.g. item identity') image = models.ImageField(default="add Item image", upload_to=get_uplaod_file_name) def __str__(self): return self.title + " " + str(self.publish) And this is my views.py file class ReportCreate(generic.CreateView): model = Report_item fields = ['title','image'] def get_form(self, form_class=None): if form_class is None: form_class = self.get_form_class() form = super(ReportCreate, self).get_form(form_class) form.fields['title'].widget = TextInput( attrs={'placeholder': '*Enter UID e.g. CBSE Marksheet Roll nunber 0506***'}) return form def form_valid(self, form): self.object = form.save(commit=False) self.object.owner = self.request.user self.object.save() return FormMixin.form_valid(self, form) I am using Django 1.11 and S3 storage. Kindly help me to compress the image before uploading to s3. -
Python mysql database sync
I have 3 servers(2 Local host servers and 1 Cloud server) where mysql is installed on each of them on daily basis i need to move all the data from server 1 to cloud server and move all the data from server 2 to cloud server now cloud server will have data from server 1 as well as server 2. Now after moving all the server data to cloud i need to move the complete data from cloud to local servers 1 and server 2 in this way the local server is also update. How can i use it i am using django framework 2 and python 3. There system should check whether all the servers are sync then it should start the complete data to the respective servers. -
django two class data in one table how to append
i want Mvouchar and Mycheque details append in one list that is reports and field is also same can i append this in one function bcoz in my way it append only Mvouchars value how can i do this for both..plz help views.py def all_report(request): reports = [] for report_obj in Mvouchar.objects.all(): reports.append({'topay': report_obj.to_pay, 'chequeno': report_obj.cheque_no, 'chequedate': report_obj.cheque_date, 'date': report_obj.dated}) return render(request, 'cheque/report.html', {'reports': reports}) def all_report(request): reports = [] for report_obj in Mycheque.objects.all(): reports.append({'topay': report_obj.to_pay, 'chequeno': report_obj.cheque_no, 'chequedate': report_obj.cheque_date, 'date': report_obj.dated}) return render(request, 'Cheque/report.html', {'reports': reports}) -
Django - How to group multiple records based on multiple columns
I am new to python/django so please bear with me. I have QuerySet qrySet.values_list('group_id', 'date', 'time', 'mobile') with that I get list like this [1, datetime.date(2018, 9, 8), datetime.time(18, 39), 'phone1'] [2, datetime.date(2018, 9, 12), datetime.time(4, 0), 'phone1'] [2, datetime.date(2018, 9, 19), datetime.time(4, 0), 'phone2'] [2, datetime.date(2018, 9, 19), datetime.time(4, 0), 'phone4'] [9, datetime.date(2018, 9, 10), datetime.time(4, 35), 'phone3'] [9, datetime.date(2018, 9, 17), datetime.time(4, 35), 'phone3'] [9, datetime.date(2018, 9, 18), datetime.time(4, 35), 'phone3'] I am trying to put all phone numbers together that have same group_id, date and time something like this [[group_id, date,time, [phone1, phone2, phone9]] Is there anything built-in in Django or python for this kind of thing? I tried some SO solutions using lambda but they group based on one value while I have three. Thank you -
Update an Object/Instance by overwriting the save method of another Model, by using the FK
I have the following models: class User(AbstractBaseUser, PermissionsMixin): acc = models.ForeignKey(Acc, blank=True, null=True, related_name='owner', on_delete=models.CASCADE) class Note(models.Model): name = models.CharField( max_length=35 receiver = models.ForeignKey(settings.AUTH_USER_MODEL, blank=True, null=True, on_delete=models.CASCADE) class Item(models.Model): note = models.ForeignKey(Notification, on_delete=models.CASCADE,) acc = models.ForeignKey(Acc, on_delete=models.CASCADE) def save(self, *args, **kwargs): ..... # update note Note.objects.filter(id=self.note_id) .update(receiver=self.account.owner) I overwrite the save' method on theItemObject/Model, to update the 'Note' Modelreceiver` using the ForeignKey. I get the following error: int() argument must be a string, a bytes-like object or a number, not 'RelatedManager' -
Django Viewflow - How do apply the same activation for multiple tasks
With viewflow, My usecase is this: A user is assigned multiple tasks. He wants to select some of the task and apply the same activation(Approve/Reject) to them. How can we do this? -
DRF : how to get the verbose name for choices?
Let's say I have this model: class Student(models.Model): YEAR_IN_SCHOOL_CHOICES = ( (FR, 'Freshman'), (SO, 'Sophomore'), (JU, 'Junior'), (S, 'Senior'), ) year_in_school = models.CharField( max_length=2, choices=YEAR_IN_SCHOOL_CHOICES, default=FRESHMAN, ) If I use DRF to expose the value for the year_in_school field, I get the first parameter of the choice, for example: "FR". How can I expose the second parameter "Freshman" instead of "FR"? -
Django REST Framework translation does not work
I have a problem with translating custom exception in Django rest, the problem is when I change the LANGUAGE_CODE in the settings, every things work fine and i get correct translation for both of my languages, but when I tried to use Accept-Language in the header to change the translation, it does not work as it should! my settings is: MIDDLEWARE = [ 'django.middleware.security.SecurityMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.middleware.locale.LocaleMiddleware', 'django.middleware.common.CommonMiddleware', 'django.middleware.csrf.CsrfViewMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'core.middleware.auth_middleware', 'django.contrib.messages.middleware.MessageMiddleware', 'django.middleware.clickjacking.XFrameOptionsMiddleware', 'core.middleware.dates_middleware', 'core.middleware.translation_middleware', ] #LANGUAGE_CODE = 'fa-ir' LANGUAGE_CODE = 'en-us' LANGUAGES = [ ('fa', _('Farsi')), ('en', _('English')), ] TIME_ZONE = 'UTC' USE_I18N = True USE_L10N = True my exception: from rest_framework.exceptions import APIException from django.utils.translation import ugettext as _ class WrongUsernamePassword(APIException): status_code = 401 default_detail = _('username or password is wrong') default_code = '401' my view: class UserViewSet(viewsets.ModelViewSet): ... @list_route(methods=['POST'], permission_classes=[AllowAny]) def app_login(self, request): lang = translation.get_language() # here the value is fa raise WrongUsernamePassword when I send the request with this header (Accept-Language=fa-ir) I can see that the lang variable value is fa so framework know that I change the language but the response is still in english: { "detail": "username or password is wrong" } any idea? -
How to perform stock updation process in Django Oscar
I was going through the code for the stock record model here, and above the num_allocated field it says in the comment, #: The amount of stock allocated to orders but not fed back to the master #: stock system. A typical stock update process will set the num_in_stock #: variable to a new value and reset num_allocated to zero So, how do I do the stock update process as specified in the comment when the product is out of stock?I need to set the num_in_stock variable to new value and set the num_allocated to zero. So far if the order is being shipped, I call the consume_stock_allocations() method in the EventHandler Class and the num in stock for the products in the order is being reduced. If someone has implemented this please do share some code or some example as I am new to oscar. -
This is from python and django framework question
How do you handle asynchronous task in Django? Mmmmmmmmmmm -
DJANGo Ajax request sometime return response and some time error
error:: jquery.min.js:2 POST http://127.0.0.1:9000/xyz/test 0 () path('test', views.test,name="test") enter code here def test(request): json_data= json.dumps({"query_id":"213"}) return HttpResponse(json_data, content_type='application/json') function call_ajax(){ $.post({ url: "{%url 'home:test'%}", data: { 'csrfmiddlewaretoken': '{{ csrf_token }}' }, success: function (data) { console.log(data.query_id); }, error: function(XMLHttpRequest, textStatus, errorThrown) { alert(XMLHttpRequest.responseText); } }); } -
Resize image when uploading with Pillow using ModelForm
Hey I have a following code but, it return no error but the image is not being resized, at the beginning it was 6.2 MB and after running the code it is the same: My model: class Photo(models.Model): user_name= models.ForeignKey(User, on_delete=models.CASCADE, blank=True, null=True) photo= models.ImageField() photo_name= models.TextField(max_length=300) def __str__(self): return self.photo_name def get_absolute_url(self): return reverse('photo:add_photo',{'pk':self.pk}) my Model.Form class PhotoForm(ModelForm): def clean_image(self): img = self.cleaned_data.get('photo') if not img: return img maxdim = 1024 if any(dim > maxdim for dim in img.image.size): # Resize too large image up to the max_size i = Image.open(img.file) fmt = i.format.lower() i.thumbnail((maxdim, maxdim)) # We must reset io.BytesIO object, otherwise resized image bytes # will get appended to the original image img.file = type(img.file)() i.save(img.file, fmt) return img class Meta: model = Photo exclude= ('user_name',) My views.py class PhotoCreateView(View): form_class = PhotoForm template_name = 'photo/photo_form.html' def get(self,request): form = self.form_class(None) return render(request,self.template_name,{'form': form}) def post(self,request): form = self.form_class(request.POST, request.FILES) if form.is_valid(): return redirect('travel:main') return render(request, self.template_name,{}) Anyone knows why it returns no error but still the image has a same size. I want to upload my images on my app which is hosted on pythonanywhere.com and they have a limit of 512 MB storage which is ...
