Visibility of a Django formview in templates - django

I've followed the tutorial here to implement a basic search function: https://learndjango.com/tutorials/django-search-tutorial
I'd like to extend that tutorial by making the search function visible on the results page, allowing for repeated search. However, when I do this I can't get the search form to show up on the search results page. The search button shows up, but not the field to provide input.
Relevant code:
home.html:
<div name="searchform">
<form action="{% url 'search_results' %}" method="get">
{{ form }}
<input type="submit" value="Search">
</form>
</div>
{% block content %}
{% endblock %}
search_results.html:
{% extends home.html}
{% block content %}
<h1>Search Results</h1>
<ul>
{% for city in object_list %}
<li>
{{ city.name }}, {{ city.state }}
</li>
{% endfor %}
</ul>
{% endblock %}
Views.py:
from django.db.models import Q
from django.views.generic import TemplateView, ListView, FormView
from .models import City
class HomePageView(FormView):
template_name = 'home.html'
form_class = SearchForm
class SearchResultsView(ListView):
model = City
template_name = 'search_results.html'
def get_queryset(self):
query = self.request.GET.get('q')
object_list = City.objects.filter(
Q(name__icontains=query) | Q(state__icontains=query)
)
return object_list
urls.py:
from django.urls import path
from .views import HomePageView, SearchResultsView
urlpatterns = [
path('search/', SearchResultsView.as_view(), name='search_results'),
path('', HomePageView.as_view(), name='home'),
]
forms.py:
from django import forms
class SearchForm(forms.Form):
q = forms.CharField(label='', max_length=50,
widget=forms.TextInput(attrs={'placeholder': 'Search Here'})
)
Any advice on how I might troubleshoot this sort of issue (or if I'm blatantly doing something un-django-y) would be greatly appreciated.

You're using ListView which is a Generic display view.
You need to use get method, then you can pass the form to make the search again and stay on the same page.
class SearchResultsView(View):
template_name = 'search_results.html'
form_class = SearchForm
def get(self, request):
form = self.form_class()
query = self.request.GET.get('q')
context = {}
context['form'] = form
context['cities'] = City.objects.filter(
Q(name__icontains=query) | Q(state__icontains=query)
)
return render(self.request, self.template_name, context)
You can achieve the same result with ListView but is better if you use other based view class.
You can check the doc. here

class HomePageView(FormView):
template_name = 'home.html'
form_class = SearchForm # This line!
Remember to also apply the form_class attribute to SearchResultsView, otherwise, no forms will be interpreted. The submit button only shows up because it's not a part of the rendered form.

Related

Django Search Implementation, conditional routing

I am trying to implement basic search functionality with Django. Could use help with accessing query inputs from forms in templates in functional or class based views. Intended functionality:
If exact search query page exists, display that page
If there is a page title that contains what was queried, show results of all
If neither, display a message stating no results found
I'm just learning, so I tried functional views and class based views. I've spent a really long time on documentation/videos/textbooks and don't see how to get the intended behavior out of class-based view. I understand collecting object_list and getting query_set, but how do you then route to those three different conditions. I tried overriding dispatch() and as_views() method to no avail. Tried with a Django form class and without.
For some reason, the functional view keeps executing the first try statement instead of throwing a DoesNotExist exception when the exact match isn't found. So it shows the entry page instead of the search results page. It seems like the request.GET is None type no matter what, as when I try to print nothing shows up.
urls.py
from re import search
from django.urls import path
from . import views
from .views import IndexPageView, SearchView
app_name = "wiki"
urlpatterns = [
# ex: /wiki/
path("", views.index, name="index"),
# path("", IndexPageView.as_view(), name="index"),
# ex: /wiki/EntryPageName
path("wiki/<str:entry>/", views.displayEntry, name="displayEntry"),
# path("wiki/search/", views.searchView, name="searchView")
path("wiki/search/", SearchView.as_view(), name="searchView")
]
model
class Entry(models.Model):
title = models.CharField(max_length=64)
def __str__(self):
return f"{self.title}"
content = models.TextField()
views.py
def searchView(request):
searchedTerm = request.GET.get('q')
try:
exactMatch = Entry.objects.get(title=searchedTerm)
entryTitle = exactMatch.title
entryHTML = markdown2.markdown(exactMatch.content)
return render(request, "encyclopedia/displayEntry.html", {
"entryTitle": entryTitle,
"entryHTML": entryHTML
})
except:
try:
searchResults = Entry.objects.filter(Q(title__icontains=searchedTerm))
return render(request, "encyclopedia/searchResults.html", {
"searchResults": searchResults,
"searchedTerm": searchedTerm
})
except:
return render(request, "encyclopedia/searchResults.html", {
"emptyResults": f"No entries found matching: {searchedTerm}",
"searchedTerm": searchedTerm
})
class SearchView(ListView):
template_name = "encyclopedia/searchResults.html"
model = Entry
context_object_name = "searchList"
def get_queryset(self):
searchedTerm = self.request.GET.get('q')
try:
searchResults = Entry.objects.get(title=searchedTerm)
return searchResults
except:
try:
searchResults = Entry.objects.filter(Q(title__icontains=searchedTerm))
return searchResults
except:
pass
def as_view():
searchedTerm = self.request.GET.get('q')
try:
exactMatch = Entry.objects.get(title=searchedTerm)
entryTitle = exactMatch.title
entryHTML = markdown2.markdown(exactMatch.content)
return render(request, "encyclopedia/displayEntry.html", {
"entryTitle": entryTitle,
"entryHTML": entryHTML,
})
except:
searchResults = Entry.objects.filter(Q(title__icontains=searchedTerm))
return render(request, "encyclopedia/searchResults.html", {
"searchResults": searchResults,
"searchedTerm": searchedTerm
})
else:
return render(request, "encyclopedia/searchResults.html", {
"emptyResults": f"No entries found matching: {searchedTerm}",
"searchedTerm": searchedTerm
})
search form from layout.html
<form action="{% url 'wiki:search' %}" method="GET">
<input class="search" type="text" name="q" placeholder="Search Encyclopedia">
<!-- <input type="submit" value="submit"> -->
</form>
display entry page template
{% extends "encyclopedia/layout.html" %}
{% block title %}
{% if entryTitle %}
{{ entryTitle }}
{% else %}
Page Not Found!
{% endif %}
{% endblock %}
{% block body %}
{% if entryHTML %}
{{ entryHTML|safe }}
{% else %}
<p>This page does not exist yet.</p>
<p>Check your spelling or create a new entry!</p>
<p>?? {{ testPrint }}</p>
{% endif %}
{% endblock %}
search results page
{% extends "encyclopedia/layout.html" %}
{% block title %}
Search Results: {{ searchedTerm }}
{% endblock %}
{% block body %}
{% if searchResults %}
<h3>Search Results</h3>
<ul>
{% for result in searchResults %}
<li>{{ result.title }}</li>
{% endfor %}
</ul>
{% else %}
<h3>{{ emptyResults }}</h3>
{% endif %}
{% endblock %}
Models
class Entry(models.Model):
title = models.CharField(max_length=64)
content = models.TextField()
def __str__(self):
return self.title
Views
from django.views.generic.list import ListView
from django.views.generic.detail import DetailView
from app.models import Entry
class EntryListView(ListView):
model = Entry
paginate_by = 100 # if pagination is desired
def get_queryset(self):
queryset = super().get_queryset()
q = self.request.GET.get("q")
if q:
queryset = queryset.filter(title__icontains=q)
return queryset
class EntryDetailView(DetailView):
model = Entry
Urls
from django.urls import path
from app.views import EntryListView, EntryDetailView
urlpatterns = [
path('', EntryListView.as_view(), name='entry-list'),
path('<int:pk>/', ArticleDetailView.as_view(), name='entry-detail'),
]

How to solve method not allowed (Post) http error 405

Codes in views
I am new to django I couldn't able to rectify where it went wrong can anyone please help me on this.
class UpdateVote(LoginRequiredMixin,UpdateView):
form_class = VoteForm
queryset = Vote.objects.all()
def get_object(self,queryset=None):
vote = super().get_object(queryset)
user = self.request.user
if vote.user != user:
raise PermissionDenied('can not change another user vote')
return vote
def get_success_url(self):
movie_id = self.object.movie.id
return reverse('core:movie_detail', kwargs={'pk':movie_id})
def render_to_response(self, context, **response_kwargs):
movie_id = context['object'].id
movie_detail_url = reverse('core:movie_detail',kwargs={'pk':movie_id})
return redirect(to=movie_detail_url)
class MovieDetail(DetailView):
queryset = Movie.objects.all_with_prefetch_persons()
def get_context_data(self, **kwargs):
ctx = super().get_context_data(**kwargs)
if self.request.user.is_authenticated:
vote = Vote.objects.get_vote_or_unsaved_blank_vote(movie=self.object,user=self.request.user)
if vote.id:
vote_url_form = reverse('core:UpdateVote',kwargs={'movie_id':vote.movie.id,'pk':vote.id})
else:
vote_url_form = (reverse('core:create_vote',kwargs={'movie_id':self.object.id}))
vote_form = VoteForm(instance=vote)
ctx['vote_form'] = vote_form
ctx['vote_url_form'] = vote_url_form
return ctx
Codes in form.py
I have used this form to link with UpdateView
from django import forms
from django.contrib.auth import get_user_model
from .models import Movie,Vote
class VoteForm(forms.ModelForm):
user = forms.ModelChoiceField(widget=forms.HiddenInput,queryset=get_user_model().objects.all(),disabled=True)
movie = forms.ModelChoiceField(widget=forms.HiddenInput,queryset = Movie.objects.all(),disabled=True)
value = forms.ChoiceField(widget=forms.RadioSelect,choices=Vote.VALUE_CHOICE)
class Meta:
model = Vote
fields = ('value','user','movie',)
urls.py
This is the url mapping for the view.
from django.contrib import admin
from django.urls import path
from .views import MovieList,MovieDetail,PersonDetail,CreateVote,UpdateVote
app_name = 'core'
urlpatterns = [
path('movies/', MovieList.as_view(), name='movie_list'),
path('movie/<int:pk>/', MovieDetail.as_view(), name='movie_details'),
path('person/<int:pk>/', PersonDetail.as_view(), name='person_details'),
path('movie/<int:movie_id>/vote/', CreateVote.as_view(), name='create_vote'),
path('movie/<int:movie_id>/vote/<int:pk>', UpdateVote.as_view(), name='UpdateVote'),
]
HTML template
This is the template I used.
{% block sidebar %}
<div>
{% if vote_form %}
<form action="{{vote_form_url}}" method="post" enctype="multipart/form-data">
{% csrf_token %}
{{ vote_form.as_p }}
<button class="btn btn-primary" type="submit" >Vote</button>
</form>
{% else %}
<p>Login to vote for this movie</p>
{% endif %} </div> {% endblock %}
The problem caused because your form was sent to another path which doesn't allow POST request. vote_form_url is not which you added in the view context, use vote_url_form instead.
...
<form action="{{ vote_url_form }}" method="post" enctype="multipart/form-data">
...
Btw, your MovieDetail view can get rid of if self.request.user.is_authenticated: by using LoginRequiredMixin like UpdateVote view.
Hope that helps!

Django Widget not Loading

I using Django with widgets to get some user input but I can't seem to get it to display even thou the code seems almost identical to examples online.
forms.py
from django import forms
class PickerIDForm(forms.Form):
pickeID = forms.NumberInput()
views.py
def get_id(request):
template = loader.get_template('metrics/lance1.html')
def get(self, request):
form = PickerIDForm()
return render(request, 'self.template', {'form': form})
context ={
}
return HttpResponse(template.render(context,request))
urls.py
from django.urls import path
from . import views
from . import mark_views
app_name = 'metrics'
urlpatterns = [
path('', views.index, name='index'),
path('test/', views.get_id, name='get_id'),
]
test.html
{% extends 'base.html' %}
{% block content %}
<p>User Input</p>
<form method = "post" >
{% csrf_token %}
{{form.as_p}}
<button type="submit"> Submit </button>
</form>
{% endblock %}
I'm never directly calling the get function as defined in views.py that to me seems to be a possible source of the input fields not showing up when I load up test.html
At what point do you link the disparate parts together? Because it seems I'm missing something.
You have defined the widget instead of the field in your form.
To fix that replace pickeID = forms.NumberInput() with pickeID = forms.IntegerField()
And also write your view like this:
def get_id(request):
form = PickerIDForm()
return render(request, 'metrics/lance1.html', {'form': form})

Django DetailView get_context_data

I'm new in Django. There is a html page (project_details) which should show the title and the tasks of the project, but shows only the title of the project, not the tasks. The tasks exists, the problem is the filter!!!
views.py The error is here
from .models import Project,Task
from django.views.generic import ListView, DetailView
class ProjectsList(ListView):
template_name = 'projects_list.html'
queryset= Project.objects.all()
class ProjectDetail(DetailView):
model = Project
template_name = 'projects_details.html'
def get_context_data(self, **kwargs):
context = super(ProjectDetail, self).get_context_data(**kwargs)
## the context is a list of the tasks of the Project##
##THIS IS THE ERROR##
context['tasks'] = Task.object.filter(list=Project) <---->HERE ((work with Task.object.all() ))
return context
models.py
class Project(models.Model):
title = models.CharField(max_length=30)
slug = AutoSlugField(populate_from='title', editable=False, always_update=True)
class Task(models.Model):
title = models.CharField(max_length=250)
list = models.ForeignKey(Project)
slug = AutoSlugField(populate_from='title', editable=False, always_update=True)
urls.py
from django.conf.urls import url
from .models import Project
from .views import ProjectsList, ProjectDetail
urlpatterns = [
url(r'^$', ProjectsList.as_view(), name='project_list'),
url(r'(?P<slug>[\w-]+)/$',ProjectDetail.as_view() , name='project_details'),]
projects_details.html
{% extends './base.html' %}
{% block content %}
<div>
<a href={{ object.get_absolute_url }}>
<h4> {{object.title}} </h4>
</a>
<ul>
{% for task in tasks %} <----> NO OUTPUT <li>
<li> {{task}}</li>
{% endfor %}
</ul>
</div>
{% endblock content %}
Sorry for my bad English.
Project is the model class, so doing (list=Project) doesn't make sense.
If you want to access the object in the detail view's get_context_data method, you can use self.object:
def get_context_data(self, **kwargs):
context = super(ProjectDetail, self).get_context_data(**kwargs)
context['tasks'] = Task.objects.filter(list=self.object)
return context
However, you don't actually have to override the get_context_data method at all. In your template, you can follow the relationship backwards from a project to get its tasks:
{% for task in object.task_set.all %}
<li>{{task}}</li>
{% endfor %}

Django generic views problems with url

I'm creating a website which has two list views and a details view. I have no problem getting from the first listview to the second, but I'm unsure of how to make the url for the details view
from django.conf.urls import url
from . import views
urlpatterns = [
url(r'^$', views.IndexView.as_view(), name='index'),
url(r'^(?P<pk>[0-9]+)/$', views.ItemsView.as_view(), name='items'),
url(r'^(?P<category_id>[0-9]+)/(?P<products_id>[0-9]+)/$', views.DetailView.as_view(), name='details'),
]
im not sure what to replace "category_id" and "products_id" with on the bottom url
from django.http import Http404
from django.shortcuts import render
from django.views import generic
from .models import Category, Products
class IndexView(generic.ListView):
template_name = 'products/index.html'
context_object_name = 'all_categories'
def get_queryset(self):
return Category.objects.all()
class ItemsView(generic.ListView):
template_name = 'products/items.html'
context_object_name = 'all_items'
def get_queryset(self):
return Products.objects.all()
class DetailView(generic.DetailView):
model = Products
template_name = 'products/details.html'
html:
{% extends 'products/base.html' %}
{%block title%}Home{%endblock%}
{% block body %}
{% if all_items %}
<ul>
{% for product in all_items %}
<li>{{product.name}} </li>
{% endfor %}
</ul>
{% else %}
<h3>You have no categories</h3>
{% endif %}
{% endblock %}
also what would go in the url here where the question marks are
thanks
Use name of your url, define in your url.py.
Check the documentation
<li>{{ product.name }}</li>
Why do you need category in your url ?? You can access to your product like this. And your DetailView need only the primary key of the object.
url(r'^product/(?P<products_id>[0-9]+)/$', views.DetailView.as_view(), name='details'),