NoReverseMatch at /

[pythonpaul32]

I am trying to make a hotel reservation app with Django, but I am completely stumped why I keep getting this error

NoReverseMatch at /
Reverse for 'search_results' with keyword arguments '{'check_in_date': '', 'check_out_date': ''}' not found. 1 pattern(s) tried: ['search_results/(?P<check_in_date>[^/]+)/(?P<check_out_date>[^/]+)/\\Z']

I am basically trying to pass the check_in_date and check_out_date from the index.html input onto the next page (search_results). But I don't know how to solve this. Here is the url pattern

urlpatterns = [
        path('', views.index, name='index'),
        path('search_results/<str:check_in_date>/<str:check_out_date>/', views.search_results, name='search_results'),
        path('make_reservation/<str:check_in_date>/<str:check_out_date>/', views.make_reservation, name='make_reservation')     
]

Here is the index.html file

<form method="post" action="{% url 'search_results' check_in_date=check_in_date_str check_out_date=check_out_date_str %}">
  {% csrf_token %}
  <label for="check_in_date">Check In Date:</label>
  <input type="date" id="check_in_date" name="check_in_date" required>

  <label for="check_out_date">Check-out Date:</label>
  <input type="date" id="check_out_date" name="check_out_date" required>

  <button type="submit">Search</button>
</form>

Here is the view

def index(request):
    if request.method == 'POST':
        check_in_date = request.POST.get('check_in_date')
        check_out_date = request.POST.get('check_out_date')
        search_results_url = reverse('search_results', args=[check_in_date, check_out_date])
        return redirect(search_results_url)

    return render(request, 'myapp/index.html')

If anyone can tell me what I am doing wrong here, it would be much appreciated.

[Gaurav_Kumar]

The error you are getting is due to reverse of the URL pattern for the 'search_results' view with the keyword arguments {'check_in_date': '', 'check_out_date': ''}. Since these values are empty strings, Django is not able to find a matching URL pattern for that combination, resulting in the NoReverseMatch error.

To resolve this issue, you need to handle the case where the check_in_date and check_out_date are empty strings in your view before trying to reverse the URL. You can do this by adding a condition to check if both dates are provided before attempting to redirect.

You only need to update your views.py file. Here i have updated your views.py file:-

from django.urls import reverse

def index(request):
    if request.method == 'POST':
        check_in_date = request.POST.get('check_in_date')
        check_out_date = request.POST.get('check_out_date')

        if check_in_date and check_out_date:
            search_results_url = reverse('search_results', args=[check_in_date, check_out_date])
            return redirect(search_results_url)
 
    return render(request, 'myapp/index.html')

With this change, the redirection to the 'search_results' URL will only happen if both the check_in_date and check_out_date are provided in the POST data. If any of the dates are missing, the form will be displayed again with the entered data.

Additionally, make sure that your 'search_results' view and URL pattern are properly defined to handle the parameters check_in_date and check_out_date.

[brittanysides]

The error you're encountering is related to the URL pattern and how you're passing the arguments in your template. It seems that the issue lies in the values you're passing for the check_in_date and check_out_date variables.

In your view, you're retrieving the values from the POST request using request.POST.get('check_in_date') and request.POST.get('check_out_date'). However, if these values are empty or not provided, you might end up with an empty string for both check_in_date and check_out_date. The error message suggests that you're passing empty strings as arguments to the search_results URL, which doesn't match the defined URL pattern.

To fix this issue, you can add some validation to ensure that the check_in_date and check_out_date values are not empty before redirecting. Here's an updated version of your view:

from django.http import HttpResponseBadRequest

def index(request):
    if request.method == 'POST':
        check_in_date = request.POST.get('check_in_date')
        check_out_date = request.POST.get('check_out_date')
        
        # Perform validation
        if not check_in_date or not check_out_date:
            return HttpResponseBadRequest("Invalid date input.")
        
        search_results_url = reverse('search_results', args=[check_in_date, check_out_date])
        return redirect(search_results_url)
 
    return render(request, 'myapp/index.html')

This updated code checks if check_in_date and check_out_date are empty or not provided. If either of them is empty, it returns a 400 Bad Request response. This will prevent the empty string values from being passed to the URL.

Additionally, you should also consider adding error handling in your template to display an appropriate message to the user if the dates are not provided or are invalid.

By implementing these changes, you should be able to resolve the "NoReverseMatch" error and redirect to the search_results page with the appropriate date values.
angry gran