Django community: RSS
This page, updated regularly, aggregates Django Q&A from the Django community.
-
Dango getting error while running manage.py runserver
I want to run my django API to my IP address which is 192.168.1.5:81 with port number but i am getting that You don't have permission to access that port. I have done port forwarding in my router. i am doing this because i want to get data in my android application using retrofit. enter image description here -
How can I disable URL redirect when I have a "next" url? - Django
I have created a blog with Django and whenever a user logs in, the URL redirects to the homepage and displays a success message. This is fine, however, whenever a login is required to view a certain page, Django redirects to the login page and attaches "?next=" to the end of the URL to redirect back to the previous page. The problem is that after the user logs in, the "next" URL is not executed and Django redirects to the homepage and displays the success message? Is there a way to disable this redirect whenever there is a "next" URL? views.py from django.urls import reverse from django.contrib import messages from django.shortcuts import render, redirect from django.contrib.auth import login from django.utils.safestring import mark_safe from .forms import UserLoginForm def login_view(request): if request.method == 'POST': form = UserLoginForm(data=request.POST) if form.is_valid(): student = form.get_user() login(request, user) create_url = reverse('post-create') messages.success(request, mark_safe(f'You are now logged in. Do you want to <a href="{ create_url }" class="link" title="Create a post">create a post</a>?')) return redirect('home') else: form = UserLoginForm() return render(request, 'users/login.html', {'form': form, 'title': 'Log in'}) -
Foreign key in custom user manager
I'm trying to create a custom user model in django, using a ForeignKey as required_field. My Manager is as follows: from django.contrib.auth.models import BaseUserManager from .models import State class CustomUserManager(BaseUserManager): def create_user(self, email, first_name, state, password=None, **extra_fields): email = self.normalize_email(email) user = self.model(email=email, first_name=first_name, state=State(pk=state), **extra_fields) user.set_password(password) user.save() return user def create_superuser(self, email, first_name, state, password=None, **extra_fields): email = self.normalize_email(email) user = self.model(email=email, first_name=first_name, state=State(pk=state), **extra_fields) user.set_password(password) user.save() return user When trying to use createsuperuser via manage.py, the following exception happens from .models import State ImportError: cannot import name 'State' from 'account.models' The State class exists in account.models, the module is called account I don't know how else to create the user, as a State instance is required. -
How to architect Apollo Server with Django
I had build a backend server via using Django-REST framework (For JWT authentication), I planned to apply GraphQL in my project too. When I start to learn Graphene-Python, I found out that Apollo server is having a bigger community and I plan to apply it in my project instead of using Graphene-Python. But i cant figure out how to architect my project. What I think is use Django-REST to allow my user to perform CRUD. And data retrieve using GraphQL (Apollo Server). I hope to architect my project in a long run. How can I use JWT generated by Django-REST and use in the Apollo server too? Is constructing project in this way a good choice? Or should I stick with Graphene-Python and Django? My question maybe broad, but I really want some comment from people with more experience before I put my step in. Thanks in advance. -
Python Django How to upload new image on update using custom form
I am new with python django and exploring the CRUD functionality using a custom form, i was able to edit other information successfully using below codes Model.py def image_path(instance, filename): basefilename, file_extension = os.path.splitext(filename) chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890' randomstr = ''.join((random.choice(chars)) for x in range(10)) _now = datetime.now() return 'profile_pic/{year}-{month}-{day}-{imageid}-{basename}-{randomstring}{ext}'.format( imageid=instance, basename=basefilename, randomstring=randomstr, ext=file_extension, year=_now.strftime('%Y'), month=_now.strftime('%m'), day=_now.strftime('%d') ) class Profile(models.Model): profile_fname = models.CharField(max_length=200, verbose_name="first name") # character field profile_lname = models.CharField(max_length=200, verbose_name="last name") profile_email = models.EmailField(unique=True, max_length=200, verbose_name="Email") profile_image = models.ImageField(upload_to=image_path, default='profile_pic/image.jpg') pub_date = models.DateTimeField('date registered') # DateTimeField def __str__(self): return self.profile_email View.py def processedit(request, profile_id): profile = get_object_or_404(Profile, pk=profile_id) try: profile_info = Profile.objects.filter(id=request.POST['id']).update(profile_email=request.POST['email'], profile_fname=request.POST['fname'], profile_lname=request.POST['lname'], profile_image=request.FILES['image']) except (KeyError, Profile.DoesNotExist): return render(request, 'profiles/detail.html', { 'profile': profile, 'error_message' : "Problem updating record", }) else: return HttpResponseRedirect(reverse('profiles:detail', args=(profile.id,))) I assumed that profile_image=request.FILES['image'] will update the profile_image field but it only updated the database and did not move the selected image, is there another way to handle image using a custom form? -
How to use Django Cycle for displaying Two post on one row?
Following code giving me the output of one post in one row, how can I change it to display two posts in one row ? <div class="col-md-4 mt-3 left"> {% for post in disease_list %} <div class="card mb-4"> <div class="card-body"> <h6 class="card-title"><a href="{% url 'disease_detail' post.slug %}"> {{ post.title }}</a></h6> </div> </div> {% endfor %} </div> Does Cycle method is good to implement here ? If Yes then how ? -
How to create unique_together on two date fields in Django model
I have a table in my Django project where the key field must depend on a combination of two dates. The table is: models.py class basicPrice(models.Model): to_charge = models.DecimalField(max_digits=5, decimal_places=2, verbose_name='Basic Charge') from_date = models.DateField(null=True, verbose_name='From date') to_date = models.DateField(null=True, verbose_name='To date') class Meta: unique_together = [['from_date', 'to_date'],] And in my forms.py, I am doing: def validate_unique(self): try: self.instance.validate_unique() except ValidationError: self._update_errors({'from_date': _('Record exists for the combination of key fields.')}) My requirement is that a new record can not be created for the same combination of dates, from_date and to_date. However, with the current arrangement I am getting validation error for the second record onwards (i.e. the first record was created as expected, but creating subsequent ones is raising error), even though I am keeping the dates different. I tried this solution but still stuck at the very same issue. My question is: How do I create a unique_together for my model based on two date fields. -
Can snmpreceiver or pysnmp module be used to collect data for a printer monitoring system using django?
i am trying to generate SNMP data for printers for later analysis using a prediction algorithm to be able to fortell emanating faults in printers before they actually occur. I seek advice on how best i could collect the data and prepare it in a dataset format like .csv so as to feed it into my classifier. Would really appreciate any help rendered Cheers! -
Problem witth uploading and viewing images with django
Hope someone could help me, Thanks! I can't figure out what is wrong with my code. I already read tons of articles about this problem but none of 'em have helped me. It's really simple, I'm trying to upload a dynamic image with django, but I keep having this problem. The 'cover' attribute has no file associated with it. ''' Environment: Request Method: GET Request URL: http://127.0.0.1:8000/band/ Django Version: 3.0.4 Python Version: 3.8.2 Installed Applications: ['search.apps.SearchConfig', 'django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', 'django.contrib.staticfiles'] Installed Middleware: ['django.middleware.security.SecurityMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.middleware.common.CommonMiddleware', 'django.middleware.csrf.CsrfViewMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.contrib.messages.middleware.MessageMiddleware', 'django.middleware.clickjacking.XFrameOptionsMiddleware'] Template error: In template C:\Users\arian\Dev\db_vinili\src\dbvinili\search\templates\search\band.html, error at line 22 The 'cover' attribute has no file associated with it. 12 : <div class="cat"> 13 : <h2> BAND </h2> 14 : </div> 15 : 16 : 17 : {% for Info in object_list %} 18 : <div class="container"> 19 : 20 : <div class=album> 21 : <!-- insert an image --> 22 : <img src= " {{Info.cover.url}} " width="100%"> 23 : 24 : </div> 25 : 26 : 27 : <div class="info"> 28 : <!-- insert table info --> 29 : <table> 30 : <tr> 31 : <td> Band </td> 32 : <td> {{Info.band}}</td> Traceback (most recent call last): File "C:\Users\arian\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\template\base.py", … -
Error in for loop using jinja format in html5 file
I want to display a series of dynamic entries on my webpage.So i have used a for loop in my html5 file using jinja but keep getting this error. Request Method: GET Request URL: http://127.0.0.1:8000/ Django Version: 2.2.5 Exception Type: TemplateSyntaxError Exception Value: Invalid block tag on line 264: 'endfor'. Did you forget to register or load this tag? Exception Location: D:\anacondapython3\lib\site-packages\django\template\base.py in invalid_block_tag, line 534 Python Executable: D:\anacondapython3\python.exe Python Version: 3.7.4 Python Path: ['E:\\coding\\fyp\\travel', 'D:\\anacondapython3\\python37.zip', 'D:\\anacondapython3\\DLLs', 'D:\\anacondapython3\\lib', 'D:\\anacondapython3', 'D:\\anacondapython3\\lib\\site-packages', 'D:\\anacondapython3\\lib\\site-packages\\win32', 'D:\\anacondapython3\\lib\\site-packages\\win32\\lib', 'D:\\anacondapython3\\lib\\site-packages\\Pythonwin'] Server time: Thu, 26 Mar 2020 12:29:39 +0000 Error during template rendering In template E:\coding\fyp\travel\templates\index.html, error at line 264 Invalid block tag on line 264: 'endfor'. Did you forget to register or load this tag? 254 <div class="destination_image"> 255 <img src="images/destination_1.jpg" alt=""> 256 <div class="spec_offer text-center"><a href="#">Special Offer</a></div> 257 </div> 258 <div class="destination_content"> 259 <div class="destination_title"><a href="destinations.html">{{dest.name}}</a></div> 260 <div class="destination_subtitle"><p>{{dest.dest}}</p></div> 261 <div class="destination_price">{{dest.price}}</div> 262 </div> 263 </div> 264 {% endfor %} 265 266 267 268 </div> 269 </div> 270 </div> 271 </div> 272 </div> 273 274 <!-- Testimonials --> the part i want to make dynamic using for loops look like this: <!-- Destinations --> <div class="destinations" id="destinations"> <div class="container"> <div class="row"> <div class="col text-center"> <div class="section_subtitle">simply … -
Unknown custom command in django 2.2
I have a problem with running the command in django 2.2. The application is in INSTALLED_APPS. I receive a message: Unknown command: 'my_command' Type 'manage.py help' for usage. Below is the structure of the project: project/ app/ managment/ commands/ my_command.py models.py views.py ... my_command.py from django.core.management.base import BaseCommand class Command(BaseCommand): help = 'My custom command' def handle(self, *args, **options): code here -
How to make that one user can have multiple picks but only one pick can have 5 heroes - DjangoModel
I know what I need. Problem is that I don`t have a clue how to write it. I want that user that register on website can have multiple drafts, like draft1, draft2, draft3, etc. but all the draft`s cant have more then 5 heroes. In my posgresql i have one user and 119 heroes at this moment that have their IDs. I tried something like this : models.py from django.db import models from users.models import User from heroes.models import Hero from django.core.exceptions import ValidationError class UserPick(models.Model): draft = models.IntegerField() def __str__(self): return str(self.draft) def save(self, *args, **kwargs): if self.__class__.objects.filter(draft=self.draft).count() >= 5: return None return super().save(*args, **kwargs) class UserDrafts(models.Model): user_id = models.ForeignKey(User, on_delete=models.CASCADE, related_name="user_id") pick = models.ForeignKey(UserPick, on_delete=models.CASCADE) hero_id = models.ForeignKey(Hero, on_delete=models.CASCADE) def save(self, *args, **kwargs): if self.__class__.objects.filter(user_id=self.user_id).count() >= 5: raise ValidationError('Maximum five picks are allowed per user') return super().save(*args, **kwargs) def __str__(self): return self.user_id.username class Meta: verbose_name = "UserDraft" verbose_name_plural = "UserDrafts" As title say i want to have that one user can have multiple drafts but all the draft need to have 5 heroes exactly or it error will be thrown. I`m trying to figure it out in my head but it wont work :) What i mean is … -
Is there a way of chaining multiple models and query them in a single response?
Hi i'm new to Django and need a little help. I'm building an API using Django and Graphene for a news site. I created multiple post models for each news cast so that each news cast can just view their corresponding model in the Django Admin panel. The problem i'm facing is that i need to chain or combine all the models for a single query so i can display all of the posts created from all of the models. In this example i imported both of the post model in the schema file. Is this the right approach if yes is there a way of chaining them into a single query? import graphene from graphene_django import DjangoObjectType from .models import News, Sport from users.schema import UserType from graphql import GraphQLError from django.db.models import Q class NewsType(DjangoObjectType): class Meta: model = News class SportType(DjangoObjectType): class Meta: model = Sport class Query(graphene.ObjectType): news = graphene.List(NewsType) sports = graphene.List(SportType) def resolve_news(self, info): return News.objects.all() def resolve_sports(self, info): return Sports.objects.all() Thank you! -
Broken Requirements.txt?
To give all details about my issue it's probably best to give a slight backstory. For the past few months I've been working on a Django project at work. Because of recent obvious events I'm working from home, thus I had to transfer the project to my home PC (using Git). At work I made a requirements.txt, which I would use to get all the packages at home. This worked, but it wouldn't install at home, and I soon found out it was because the requirements.txt had a package that was invalid and didn't exist. This is: pkg-resources==0.0.0 I deleted it from the requirements file and everything went fine afterwards. Fast forward to now: I'm trying to deploy the project on our amazon beanstalk, and its failing with this error: 2020-03-26 12:03:10 ERROR Your requirements.txt is invalid. Snapshot your logs for details. 2020-03-26 12:03:13 ERROR [Instance: i-0xxxxxxx] Command failed on instance. Return code: 1 Output: (TRUNCATED)...) File "/usr/lib64/python2.7/subprocess.py", line 190, in check_call raise CalledProcessError(retcode, cmd) CalledProcessError: Command '/opt/python/run/venv/bin/pip install -r /opt/python/ondeck/app/requirements.txt' returned non-zero exit status 1. Hook /opt/elasticbeanstalk/hooks/appdeploy/pre/03deploy.py failed. For more detail, check /var/log/eb-activity.log using console or EB CLI. 2020-03-26 12:03:13 INFO Command execution completed on all instances. Summary: [Successful: … -
How do I can I get data from model functions to appear in Django Admin?
How can I get data for get_num_states to appear as a field, showing number of states a country has, in Django Admin for each record I have of a country? I know that get_num_states seems to be working as I am able to display info from the function in html templates. However I currently don't see it displaying in Django Admin. class Country(models.Model): country_name = models.CharField(max_length=50) create_date = models.DateTimeField() def get_num_states(self): return State.objects.filter(country=self.id).count() def __str__(self): return self.country_name class State(models.Model): state_name = models.CharField(max_length=50) country = models.ForeignKey(Country, on_delete=models.CASCADE) -
How to get model field value from model and field in django template?
I would like to create a template for printing table. I was thinking that when I put all objects of specific model into rows and specific fields of that model into columns I could get values in cells. This is my idea: # views.py def users(request): all_users = models.CustomUser.objects.all() fieldnames = ['id', 'email', 'first_name', 'last_name', 'department'] fields = [all_users[0]._meta.get_field(field) for field in fieldnames] context = { 'rows': all_users, 'columns': fields, } return render(request, 'table.html', context=context) # table.html <table> <tr> {% for col in columns %} <th>{{ col.verbose_name }}</th> {% endfor %} </tr> {% for row in rows %} <tr> {% for col in columns %} <td>{{ row|col }}</td> # or row.col or row:col {% endfor %} </tr> {% endfor %} </table> How can I get there? Is this the right way of thinking and doing? Or should I somehow manage the data before rendering? -
Pop up a table using ajax in Django
In my project I am trying to add a pop up in a table row but by javascript only Its not working. I dont understand how to add the ajax request for the pop up. The which I want to up but if I add this to then It totally conflict . and If I am adding at the end of the div then I am not able to use the value because it is outside of the for loop. Here is the template: {% extends 'admin-template/base.html' %} {% load static %} {% block content %} <head> <!-- Required meta tags --> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"> <title>Orders</title> </head> <body> <div class="container-scroller"> <!-- partial:../../partials/_navbar.html --> {% include 'admin-template/_navbar.html' %} <!-- partial --> <div class="container-fluid page-body-wrapper"> <!-- partial:../../partials/_sidebar.html --> {% include 'admin-template/_sidebar.html' %} <!-- partial --> <div class="main-panel"> <div class="content-wrapper"> <div class="page-header"> <h3 class="page-title"> Extras</h3> <!--<nav aria-label="breadcrumb"> <a href="editusers.html"> <button type="submit" class="btn btn-gradient-primary mb-2">Add Products</button> </a> </nav>--> </div> <div class="row"> <div class="col-lg-12 grid-margin stretch-card"> <div class="card"> <div class="card-body"> <!--<h4 class="card-title">Bordered table</h4> <p class="card-description"> Add class <code>.table-bordered</code>--> {% if messages %} <ul class="messages"> {% for message in messages %} <li{% if message.tags %} class="{{ message.tags }}"{% endif %}><font color="{{ message.tags … -
how can I render a view only when a certain field is True? - Django
I have created detailed views for the posts in my Django-based blog using the DetailView generic class and everything works fine so far. The problem, however, is that I have a field in my post model that is used to set the status of the posts (active, inactive, blocked) and I only want to render the detailed views when the status is active. If anyone knows of a way to achieve this, please let me know and I ask that you be as detailed as possible. Thanks -
Media images are not loading in template page when DEBUG=false in setti gs.py in django
facing error while debug is true in production I hosted my website but there is a problem with the media files. The media files are not loading in the templates because I set DEBUG = True , in my settings.py file. What should I do now to fix this error ? -
Load CSV file in Django view and turn into HTML table
I have this view code def datatable(request, file): csv_fp = open(f'data/{file}.csv', 'r') reader = csv.DictReader(csv_fp) headers = [col for col in reader.fieldnames] out = [row for row in reader] return render(request, 'datatable.html', {'data' : out, 'headers' : headers}) and here's my template <table id="table" class="display" style="width: 100%;"> <thead> <tr> {% for header in headers%} <th>{{ header }}</th> {% endfor %} </tr> </thead> <tbody> <tr> {% for row in out%} <td>{{row}}</td> {% endfor %} </tr> </tbody> </table> I'm trying to turn this CSV into a table in my Django template. The headers are done correctly, but the rows are off. Is there a better way to read the rows so it'll go into tbody easier? -
Django Signals check when all post_save completed and the run final function
Is there a way to catch all post_save signals (initiated from the current request) and to check when all of them are finished? If all post_save completes then run final function. Example: from django.db import models from django.db.models.signals import post_save from django.dispatch import receiver @receiver(post_save, sender=Model1) @receiver(post_save, sender=Model2) @receiver(post_save, sender=Model3) def example_function(sender, instance, created, **kwargs): if created and isinstance(instance, Model1): run_model1_fun() if created and isinstance(instance, Model2): run_model2_fun() if created and isinstance(instance, Model3): run_model3_fun() #IF all post_save completed run_final() -
Exclude .env directory from flake8 tests?
I'm getting thousands of flake8 errors stemming from my local .env. An example of some of the error messages: ./env/lib/python3.7/site-packages/pip/_vendor/pyparsing.py:3848:80: E501 line too long (85 > 79 characters) ./env/lib/python3.7/site-packages/pip/_vendor/pyparsing.py:3848:84: E202 whitespace before ')' ./env/lib/python3.7/site-packages/pip/_vendor/pyparsing.py:3855:51: E201 whitespace after '(' ./env/lib/python3.7/site-packages/pip/_vendor/pyparsing.py:3855:65: E202 whitespace before ')' ./env/lib/python3.7/site-packages/pip/_vendor/pyparsing.py:3858:50: E201 whitespace after '(' ./env/lib/python3.7/site-packages/pip/_vendor/pyparsing.py:3858:78: E202 whitespace before ')' ./env/lib/python3.7/site-packages/pip/_vendor/pyparsing.py:3861:31: E231 missing whitespace after ',' ./env/lib/python3.7/site-packages/pip/_vendor/pyparsing.py:3865:1: W293 blank line contains whitespace ./env/lib/python3.7/site-packages/pip/_vendor/pyparsing.py:3866:1: E302 expected 2 blank lines, found 1 My directory looks like this: My flake8 file looks like this: [flake8] exclude = migrations, __pycache__, manage.py, settings.py, How can I add my env file contents to the exclude list in flake8? I've tried adding: ./env, In the flake8 file but it hasn't stopped the errors. -
Posting Foreign key to DRF Api using React
I want to Post the Company object using React. However, the Foreign key seems to be failing. I'm not sure how so I pass the data for address and invoice address. Below is my code models.py class Address(models.Model): id = models.UUIDField() city = models.CharField(max_length=20, null=True, blank=True) created = models.DateTimeField(auto_now_add=True) modified = models.DateTimeField(auto_now=True) class Company(models.Model): id = models.UUIDField() address = models.ForeignKey(Address, on_delete=models.CASCADE, related_name='address') invoice_address = models.ForeignKey(Address, on_delete=models.CASCADE, related_name='invoice_address') serializers.py class AddressSerializer(serializers.ModelSerializer): class Meta: model = Address exclude = ('id', 'created', 'modified') class CompanySerializer(serializers.ModelSerializer): address = AddressSerializer() invoice_address = AddressSerializer() class Meta: model = Company def create(self, data): #create address if it does not exist -
Django QuerySet evaluation on accessing elements via []
@pytest.mark.django_db def test_cats(self): CatFactory.create_batch(2) cats = Cat.objects.all() self.assertNotEqual(cats[0], cats[1]) Why does this test case pass? Is this one of the cases when Django QuerySets get evaluated (iteration, slicing, etc.)? -
django-rules: where to put the rules/predicates?
Stupid question but when using django-rules for usage in RulesModel, where to I put my custom predicates? Do I create a separate rules file and import it into models.py?
