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Django form is valid() returns false

I am trying to do multiple file uploads in Django but am encountering some errors: form.is_valid() returning false. <br>
I have tried printing form.erorrs and it gives me the following:
<ul class="errorlist"><li>uploaded_images<ul class="errorlist"><li>“b'\xbd\x06D\xcd3\x91\x85,\xdf\xa5K\n'” is not a valid value.</li></ul></li></ul>
I am not sure how to interpret this general error. Been searching for quite some time but couldn't find an answer.
Edit:
Im also encountering a "This field is required." error
Perhaps this screenshot may help with debugging:
I must be missing something simple but I just can't find it!!
Another pair of eyes to help me sieve through would be very appreciated!
views.py
from django.shortcuts import render,redirect
from django.views.generic.edit import FormView
from .forms import BRForm
from .models import *
class BRHomeView(FormView):
form_class = BRForm
model = TargetImage
template_name = 'br/br-home.html'
context_object_name = 'bankrecon'
def get(self, request):
form = BRForm(request.POST, request.FILES)
return render(request, self.template_name, {'form': form, 'title': 'Bank Reconcilation'})
def post(self, request, *args, **kwargs):
form_class = self.get_form_class()
form = self.get_form(form_class)
files = request.FILES.getlist('uploaded_images')
print("POST")
print(request.POST)
print("FILES")
print(request.FILES)
print(form.errors)
if form.is_valid():
form.save()
return redirect('br-home')
models.py
from django.db import models
# Create your models here.
class UploadedImages(models.Model):
image_files = models.ImageField(null=True, blank=True, upload_to='images/')
class TargetImage(models.Model):
invoice_date = models.DateTimeField()
recon_date = models.DateTimeField()
uploaded_images = models.ManyToManyField(UploadedImages)
def __str__(self):
return self.invoice_date
forms.py
from django import forms
from django.core.validators import FileExtensionValidator
from .models import *
class BRForm(forms.ModelForm):
class Meta:
model = TargetImage
fields = ('invoice_date', 'recon_date', 'uploaded_images')
widgets = {
'invoice_date': forms.DateInput(attrs={'type': 'date'}),
'recon_date': forms.DateInput(attrs={'type': 'date'}),
'uploaded_images': forms.ClearableFileInput(attrs={'multiple': True, 'accept':'.jpeg, .png, .jpg'}),
}
relevant template code:
<div class="mt-5 d-flex justify-content-center">
<form action="" enctype="multipart/form-data" method="POST">
{% csrf_token %}
{{ form.as_p }}
<div class="d-flex justify-content-center">
<button class="btn btn-success mt-3" type="submit">Submit</button>
</div>
</form>
</div>
Extra info: My request.POST and request.FILES seems to be working fine:
POST
<QueryDict: {'csrfmiddlewaretoken': ['hiding this'], 'invoice_date': ['2021-02-01'], 'recon_date': ['2021-02-01']}>
FILES
<MultiValueDict: {'uploaded_images': [<InMemoryUploadedFile: first_slide (1).jpg (image/jpeg)>, <InMemoryUploadedFile: fourth_slide (1).jpg (image/jpeg)>]}>
Thank you all!!

Some errors that I see in your code:
You're trying to render a POST request in your get method.
You're not passing any data from POST request to your form instance. That's why is_valid() is returning False.
Change your code to something like this and see if it works:
...
def get(self, request):
form = BRForm()
return render(request, self.template_name, {'form': form, 'title': 'Bank Reconcilation'})
def post(self, request, *args, **kwargs):
form = BRForm(request.POST)
if form.is_valid():
form.save()
return redirect('br-home')

I have managed to solve this issue! <br>
Link: https://stackoverflow.com/a/60961015/10732211 <br>
I overhauled the entire thing and followed the above link. Probably the models relations have some issues that does not work. <br>
views.py
class BRHomeView(FormView):
# model = TargetImage
template_name = 'br/br-home.html'
context_object_name = 'bankrecon'
def get(self, request):
form = BRFormExtended()
return render(request, self.template_name, {'form': form, 'title': 'Bank Reconcilation'})
def post(self, request, *args, **kwargs):
form = BRFormExtended(request.POST,request.FILES)
files = request.FILES.getlist('image_files')
if form.is_valid():
print("Form Valid")
print(form.cleaned_data['invoice_date'])
print(form.cleaned_data['recon_date'])
user = request.user
invoice_date = form.cleaned_data['invoice_date']
recon_date = form.cleaned_data['recon_date']
target_image_obj = TargetImage.objects.create(user=user,invoice_date=invoice_date, recon_date=recon_date)
for file in files:
UploadedImage.objects.create(target_image=target_image_obj,image_files=file)
else:
print("Form Invalid")
return redirect('br-home')
forms.py
class BRForm(forms.ModelForm):
class Meta:
model = TargetImage
fields = ['invoice_date', 'recon_date']
widgets = {
'invoice_date': forms.DateInput(attrs={'type': 'date'}),
'recon_date': forms.DateInput(attrs={'type': 'date'}),
}
class BRFormExtended(BRForm):
image_files = forms.FileField(widget=forms.ClearableFileInput(attrs={'multiple': True}))
class Meta(BRForm.Meta):
fields = BRForm.Meta.fields + ['image_files',]
models.py
from django.contrib.auth.models import User
from django.utils import timezone
class TargetImage(models.Model):
user = models.OneToOneField(User,on_delete=models.CASCADE)
uploaded_date = models.DateTimeField(default=timezone.now)
invoice_date = models.DateTimeField()
recon_date = models.DateTimeField()
def __str__(self):
return self.user.__str__()
class UploadedImage(models.Model):
target_image = models.ForeignKey(TargetImage, on_delete=models.CASCADE)
image_files = models.ImageField(null=True, blank=True, upload_to='images/')
Also, it would be helpful to have a media root folder and edits to urls.py is also required.
urls.py
from django.urls import path
from .views import BRHomeView
from django.conf import settings
from django.conf.urls.static import static
urlpatterns = [
path('', BRHomeView.as_view(), name='br-home'),
] + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)
settings.py
MEDIA_URL = '/media/'
MEDIA_ROOT = os.path.join(BASE_DIR, 'media')
STATIC_URL = '/static/'
STATICFILES_DIRS = (os.path.join(BASE_DIR, "static"),)
Hopefully this will help someone!

I am not able to understand this error: TypeError: cannot convert dictionary update sequence element #0 to a sequence

I am getting stuck with the new_entry functionality , This is a project in the crash course for python book , I have tried to verify my code a number of times not able to figure out why I get this error:
TypeError: cannot convert dictionary update sequence element #0 to a sequence
File views.py
from django.shortcuts import render
from django.http import HttpResponseRedirect
from django.urls import reverse
from .models import Topic
from .forms import TopicForm
from .forms import EntryForm
def index(request):
return render(request, 'learning_logs/index.html')
def topics(request):
# display all the topics
topics = Topic.objects.order_by('date_added')
context = {'topics': topics}
return render(request, 'learning_logs/topics.html', context)
def topic(request, topic_id):
# display entries pertaining to a topic
topic = Topic.objects.get(id=topic_id)
entries = topic.entry_set.order_by('-date_added')
context = {'topic': topic, 'entries': entries}
return render(request, 'learning_logs/topic.html', context)
def new_topic(request):
# fill a new topic
if request.method != 'POST':
# No data submitted , create a blank form
form = TopicForm()
else:
# post data submitted , process data
form = TopicForm(request.POST)
if form.is_valid():
form.save()
return HttpResponseRedirect(reverse('learning_logs:topics'))
context = {'form': form}
return render(request, 'learning_logs/new_topic.html', context)
def new_entry(request, topic_id):
# Enter a new entry into any topic
topic = Topic.objects.get(id=topic_id)
if request.method != 'POST':
# NO data submitted , create a blank form
form = EntryForm()
else:
# post data submitted , process data
form = EntryForm(data=request.POST)
if form.is_valid():
new_entry = form.save(commit=False)
new_entry.topic = topic
new_entry.save()
return HttpResponseRedirect(reverse('learning_logs:topic',
args=[topic_id]))
context = {'topic': topic, 'form': form}
return render(request, 'learning_logs/new_entry.html', context)
File urls.py
from django.urls import path
from . import views
app_name = 'learning_logs'
urlpatterns = [ # Homepage
path('', views.index, name='index'),
# topics
path('topics', views.topics, name='topics'),
# entries about each topic
path('<topic_id>/topic/', views.topic, name='topic'),
# page for adding a new topic
path('new_topic/', views.new_topic, name='new_topic'),
# adding entries
path('new_entry/<int:topic_id>/', views.new_entry, name='new_entry'),
]
And this is the place where i am getting stuck with the new_entry functionality, file new_entry.html
{% extends "learning_logs/base.html" %}
{% block content %}
<p>{{ topic }}</p>
<p>New entry</p>
<form action="{% url 'learning_logs:new_entry' topic.id %}" method="post">
{% csrf_token %}
{{form.as_p}}
<button name="submit">add entry</button>
</form>
{% endblock content %}
File forms.py
from django import forms
from .models import Topic
from .models import Entry
class TopicForm(forms.ModelForm):
class Meta:
model = Topic
fields = ['text']
labels = {'text': ''}
class EntryForm(forms.ModelForm):
class Meta:
model = Entry
fields = ['text']
labels = {'text': ''}
widgets = {'text': forms.Textarea(attrs={'cols', 80})}
File models.py
from django.db import models
class Topic(models.Model):
# A topic that the user is learning about
text = models.CharField(max_length=200)
date_added = models.DateTimeField(auto_now_add=True)
def __str__(self):
# Return the info as a string
return self.text
class Entry(models.Model):
# something specific learned about a topic
topic = models.ForeignKey(Topic, on_delete=models.PROTECT)
text = models.TextField()
date_added = models.DateTimeField(auto_now_add=True)
class Meta:
verbose_name_plural = "entries"
def __str__(self):
# A representation of the data in string form
if len(self.text) > 50:
return str(self.text)[:50] + "...."``
else:
return self.text

I suspect the error is in your EntryForm.Meta.widgets; attrs is supposed to be a dict (should be written as {'cols': 80}), but you are passing a set with 2 elements (you wrote {'cols', 80}).
Notice how you used a comma , instead of a colon :.
The corrected code would be:
class EntryForm(forms.ModelForm):
class Meta:
...
widgets = {
'text': forms.Textarea(attrs={'cols': 80}),
}

Tango with Django Chapter 6 - URL won't work

I have been going through "Tango with Django" and have been unable to solve this problem myself or by looking online. Would anyone know how to approach it?
The relevant page should be opened when I click on the link, but none are going through, which makes me assume something in my view.py file is wrong or even in my url.py or model.py file (index.html seems to be working correctly).
Views.py
# Create your views here.
from django.http import HttpResponse
from django.shortcuts import render
from Spaces.models import Category, Page
def index(request):
# Query the databse for a list of ALL categories currently stored.
# Order the categories by no likes in descending order .
# Retrieve the top 5 only - or all if less than 5.
# Place the list in context_dict dictionary
# that will be passed to the template engine.
category_list = Category.objects.order_by('-likes')[:5]
context_dict = {'categories': category_list}
# Render the response and send it back!
return render(request, 'Spaces/index.html', context=context_dict)
def about(request):
context_dict = {'boldmessage':"Crunchy, creamy, cookie, candy, cupcake!"}
return render(request, 'Spaces/about.html', context=context_dict)
def show_category(request, category_name_slug):
# Create a context dictionary which we can pass
# to the template rendering engine.
context_dict = {}
try:
# Can we find a category name slug with the given name?
# If we can't, the .get() method raises a DoesNotExist exception.
# So the .get() method returns one model instance or raises an exception.
category = Category.objects.get(slug=category_name_slug)
# Retrieve all of the associated pages.
# Note that filter() will return a list of page objects or an empty list
pages = Page.objects.filter(category=category)
# Adds our results list to the template context under name pages.
context_dict['pages'] = pages
# We also add the category object from
# the database to the context dictionary.
# We'll use this in the template to verify that the category exists.
context_dict['category'] = category
except Category.DoesNotExist:
# We get here if we didn't find the specified category.
# Don't do anything -
# the template will display the "no category" message for us.
context_dict['category'] = None
context_dict['pages'] = None
# Go render the response and return it to the client.
return render(request, 'Spaces/category.html', context_dict)
Urls.py
from django.conf.urls import url
from Spaces import views
urlpatterns = [
url(r'^$', views.index, name='index'),
url(r'^about/$', views.about, name='about'),
url(r'^category/(?P<category_name_slug>[\w\-]+)/$',
views.show_category, name='show_category'),
]
models.py
from django.db import models
from django.template.defaultfilters import slugify
class Category(models.Model):
name = models.CharField(max_length=128, unique=True)
views = models.IntegerField(default=0)
likes = models.IntegerField(default=0)
slug = models.SlugField(unique=True, blank=True, null=True)
def save(self, *args, **kwargs):
self.slug = slugify(self.name)
super(Category, self).save(*args, **kwargs)
class Meta:
verbose_name_plural = 'categories'
def __str__(self):
return self.name
class Page(models.Model):
category = models.ForeignKey(Category, on_delete=models.PROTECT)
title = models.CharField(max_length=128)
url = models.URLField()
views = models.IntegerField(default=0)
def __str__(self): # For Python 2, use __unicode__ too
return self.title
index.html
<!DOCTYPE html>
{% load staticfiles %}
<html>
<head>
<title>Spaces</title>
</head>
<body>
<h1>Spaces says...</h1>
<div>hey there partner!</div>
<div>
{% if categories %}
<ul>
{% for category in categories %}
<li>
{{ category.name }}
</li>
{% endfor %}
</ul>
{% else %}
<strong>There are no categories present.</strong>
{% endif %}
</div>
<div>
About Space<br />
<img src="{% static 'images/Spaces.jpg' %}" alt="Picture of Rango" />
</div>
</body>
</html>
populate_spaces.py (test script)
import os
os.environ.setdefault('DJANGO_SETTINGS_MODULE',
'Space.settings')
import django
django.setup()
from Spaces.models import Category, Page
def populate():
#First, we will create lists of dictionaries containing the pages
# we want to add into each category.
# Then we will create a dictionary of dictionaries for our categories.
# This might seem a little bit confusing, but it allows us to iterate
# through each data structure, and add the data to our models.
python_pages = [
{"title": "Prahran",
"url":"http://docs.python.org/2/tutorial/", "views":20},
{"title": "South Yarra",
"url":"http://docs.python.org/2/tutorial/", "views":25},
{"title": "etcetera",
"url":"http://docs.python.org/2/tutorial/", "views":35}
]
django_pages = [
{"title" : "Official Django Tutorial",
"url" :"https://docs.djangoproject.com/en/1.9/intro/tutorial01/", "views":36},
{"title":"Django Rocks",
"url":"http://www.djangorocks.com/", "views":23},
{"title":"How to Tango with Django",
"url":"http://www.tangowithdjango.com/", "views":45}
]
other_pages = [
{"title":"Bottle",
"url":"http://bottlepy.org/docs/dev/", "views":3},
{"title":"Flask",
"url":"http://flask.pocoo.org",
"views":34}]
cats = {"Python": {"pages": python_pages, "views": 128, "likes":64},
"Django": {"pages": django_pages, "views": 64, "likes":32},
"Other Frameworks": {"pages": other_pages, "views": 32, "likes":16} }
# If you want to add more categories or pages,
# Add them to the dictionaries above.
# The code below goes through the cats dictionary, then adds each category
# and then adds all the associated pages for that category.
for cat, cat_data in cats.items():
c = add_cat(cat,cat_data)
for p in cat_data["pages"]:
add_page(c, p["title"], p["url"], p["views"])
#Print out the categories we have added.
for c in Category.objects.all():
for p in Page.objects.filter(category=c):
print("-{0})-{1}".format(str(c), str(p)))
def add_page(cat, title, url, views=0):
p = Page.objects.get_or_create(category=cat, title=title)[0]
p.url=url
p.views=views
p.save()
return p
def add_cat(name, cat_data):
c = Category.objects.get_or_create(name=name)[0]
c.likes = cat_data["likes"]
c.views = cat_data["views"]
c.save()
return c
# Start execution here!
if __name__ == '__main__':
print("Starting Spaces population script...")
populate()

I fixed the issue.
Essentially I had indented a return function in my view.py file incorrectly!

Querying MYSQL with Django framework in HTML

I am building a site using Django framework with google api + MYSql. Currently I display all data entries' latitude and longitude from my dB onto a heatmap layer.
I need to be able to filter my data to refine what I am displaying. e.g - I would like to filter HazardInside.title by types such as "Slip" and "trip".
This filter will need to be able to filter by many other requirements simultaneously such as date and weather conditions. e.g title="Slip" + weather="Wet" + between dates of (dd/mm/yy - dd/mm/yy)
My current problem is successfully creating a view that requests new data from my dB and parses it to my HTML page.
models.py
class HazardInside(models.Model):
title = models.CharField(max_length=50)
description = models.CharField(max_length=250)
incident_date = models.DateField(auto_now=False)
lat = models.FloatField(max_length=25, default=0.00000)
lng = models.FloatField(max_length=25, default=0.00000)
room_number = models.CharField(max_length=25)
floor = models.CharField(max_length=10)
def __unicode__(self):
return self.title
class InjuryInside(models.Model):
title = models.CharField(max_length=50)
description = models.CharField(max_length=250)
incident_date = models.DateField(auto_now=False)
lat = models.FloatField(max_length=25, default=0.00000)
lng = models.FloatField(max_length=25, default=0.00000)
room_number = models.CharField(max_length=25)
floor = models.CharField(max_length=10)
def __unicode__(self):
return self.title
views.py
from django.shortcuts import render, HttpResponse
from qutheatmap.models import Markers, HazardInside, InjuryInside
from django.template import RequestContext
from django.shortcuts import render_to_response
def home(request):
marker = Markers.objects.all()
hazardinsides = HazardInside.objects.all()
injuryinsides = InjuryInside.objects.all()
mapdata = {
'markers': marker,
'hazardinsides': hazardinsides,
'injuryinsides': injuryinsides
}
return render(request, 'heatmap/map.html', mapdata)
def search(request):
query = request.GET.get('type')
try:
query = char(query)
except ValueError:
query = None
hazardinsides = None
if query:
hazardinsides = HazardInside.objects.get(title=query)
context = RequestContext(request)
mapdata = {
'markers': marker,
'hazardinsides': hazardinsides,
'injuryinsides': injuryinsides
}
return render_to_response('heatmap/map.html', {"hazardinsides": hazardinsides,}, context_instance=context)
within my html
<form method="get" action="http://localhost:8000/qutheatmap/">
Search:<input type="text" name="type" id="id_q" value="{{ query }}"/>
<input type="submit" value="Search" />
</form>
I have tried a few different methods with my limited Django knowledge to no avail such as:
Django form to query database (models)
Querying a django DB with model forms
EDIT:
URLs
from django.conf.urls import url
from . import views
urlpatterns = [
url(r'^$', views.home),
url(r'^$', views.search),
]
URLs config
from django.contrib import admin
from django.conf.urls import url, include
from qutheatmap import views
urlpatterns = [
url(r'qutheatmap/', include('qutheatmap.urls')),
]

How to make delete button in Django

Help me please to understand how to make the delete button, its must to delete a Cat
class Cat(models.Model):
class Meta():
db_table = "cat"
paw = models.IntegerField(default=4)
name = models.CharField(max_length=30, null=False, default='Cat')
age = models.IntegerField(default=False, null=False)
species = models.CharField(max_length=50, blank=True)
hairiness = models.IntegerField(default=False, null=False)
def __str__(self):
return self.name
This is my views.py, hope you can help. (it's need for my job interview on Monday)
from django.shortcuts import render, get_object_or_404
from .models import Cat
from .forms import CatForm
from django.shortcuts import redirect
def home(request):
template = "base.html"
queryset = Cat.objects.all()
context = {
"object_list": queryset
}
return render(request, template, context)
def new_cat(request):
if request.method == "POST":
form = CatForm(request.POST)
if form.is_valid():
cat = form.save(commit=False)
cat.save()
return redirect('/', pk=cat.pk)
else:
form = CatForm()
return render(request, 'new_cat.html', {'form': form})
def cat_edit(request, pk):
cat = get_object_or_404(Cat, pk=pk)
if request.method == "POST":
form = CatForm(request.POST, instance=cat)
if form.is_valid():
cat = form.save(commit=False)
cat.save()
return redirect('/', pk=cat.pk)
else:
form = CatForm(instance=cat)
return render(request, 'new_cat.html', {'form': form})
site is asc to addd more details, but i just don't know what else, i can add.
from django.conf.urls import url
from . import views
urlpatterns = [
url(r'^$', views.home, name='home'),
url(r'^new/$', views.new_cat, name='new_cat'),
url(r'^edit/(?P<pk>[0-9]+)/$', views.cat_edit, name='cat_edit'),
]

At first, you should create a cat_delete view, which should look something like this:
def cat_delete(request, pk):
cat = get_object_or_404(Cat, pk=pk) # Get your current cat
if request.method == 'POST': # If method is POST,
cat.delete() # delete the cat.
return redirect('/') # Finally, redirect to the homepage.
return render(request, 'template_name.html', {'cat': cat})
# If method is not POST, render the default template.
# *Note*: Replace 'template_name.html' with your corresponding template name.
Then, you should map this view in your urls.py:
from django.conf.urls import url
from . import views
app_name = 'cats'
# Note that app_name is added here!
# It is used as a namespace in order to reverse your urls better.
# See usage in template.
urlpatterns = [
# ...
url(r'^delete/(?P<pk>[0-9]+)/$', views.cat_delete, name='cat_delete')
]
In your template, you should create a form with delete button, which will simply send a POST request to the delete view:
<form action="{% url 'cats:cat_delete' cat.id %}" method="post">
{% csrf_token %}
<input type="submit" value="Delete cat">
</form>
Look closely on the form's action:
{% url 'cats:cat_delete' cat.id %}
Here I am using the app_name from urls.py that I previously added in order to resolve your urls by name, not by path. Now cats:cat_delete will evaluate to cats/delete/<pk>. And of course you pass the cat.id.
This should do the trick with deleting instance of your Cat model. Hope I helped.