Error while passing value with url to django view

django url pass parameter to view
django url parameters in template
django optional url parameter
django url multiple parameters
django 2 optional url parameter
django urls path
django pass variable from template to view
django url parameters string

Error while passing value to view from template using url

Error :

Error during template rendering

In template D:\TONO\DJANGO_TASK\user_auth\templates\auth_app\other-user-listing.html, error at line 114
Reverse for 'add_to_group' with arguments '(name: Administrator,)' not found. 1 pattern(s) tried: ['auth_app\\/<str:username>/']

This my urls.py

url(r'^<str:username>/', views.add_to_group, name="add_to_group"),

This is the call from template

<a href="{% url 'add_to_group' username  %}"><i class="icon-plus">Add</i> </a>

In your call from template see if you do this if that solves the problem, I remember I was facing this issue and this is what I did:

The syntax for specifying url is {% url namespace:url_name %}. So, check if you have added the app_name in urls.py.

URL dispatcher | Django documentation, In this video I talk about how to pass values through the URL in Django. Web Development Duration: 14:16 Posted: Jan 24, 2018 Sending values via URL is known as the GET method. In Django, it is easy to retrieve the value from URL query. We can don it in both views file and a template file. Detect if the URL parameter exists in Django view. Suppose, we have “product_id” in URL query and we want to get that value.

Your url defines a named argument for the url "add_to_group". You should pass this argument as a keyword argument

{% url 'add_to_group' username=username  %}

You are mixing the new and old style urls. To use the new style you should use path

path('<str:username>/', views.add_to_group, name="add_to_group"),

Passing Values Through the URL in Django, In Chapter 3, we explained the basics of Django view functions and the view function for a particular pattern in the URLconf: you can pass a string To do this , just check the value of the DEBUG setting at runtime, like so: If you do this, Django won't throw any errors, but you'll probably find that your URLs aren't� Because this employee may belongs to multiple department, so Employee and Departments object are many to many relationship, so the employee’s department value is retrieved by {{ emp.get_dept_values }}, please read article How To Get Many To Many Model Field Values In Django View.

Error corrected using :

url(r'^auth_app/add_to_group/(?P<username>[-\w]+)/$', views.add_to_group, name='add_to_group'),

Chapter 8: Advanced Views and URLconfs — Django Book 0.1 , This tutorial tries to clarify on how one can pass parameters from one page to another page in In class based view, we can get url parameter in kwargs If the form is invalid, it will simply render the form again with entered values and errors. When Django can’t find a match for the requested URL, or when an exception is raised, Django invokes an error-handling view. The views to use for these cases are specified by four variables. Their default values should suffice for most projects, but further customization is possible by overriding their default values.

Working with URL, GET, POST parameters in Django, P), and the parameter value should be passed to views.emp_detail function's user_name argument. The \w+ is a regular expression which means� If you have used previous versions of Django, notice that the regex syntax is very familiar. The re_path() function replaced the url() function in Django 2.0. This means if you prefer regexes, you can continue to use them with the re_path() function just as you did with the url() function in Django 1.11 and earlier.

How To Pass Parameters To View Via Url In Django, This page is based on Django 2.2 LTS; see the previous Django 1.11 LTS version necessary to pass url information to the processing construct as a parameter. a not found error, in this sense, Django's url path matching/action mechanism� When a user makes a request for a page on your web app, Django controller takes over to look for the corresponding view via the url.py file, and then return the HTML response or a 404 not found error, if not found. In url.py, the most important thing is the "urlpatterns" tuple. It’s where you define the mapping between URLs and views.

Django url parameters, extra options & query strings, In this manner, the onsale key becomes a url extra option, which is passed to the Django url parameter definition for access in view methods in main urls.py file without modifying the detail method in listing 2-6 you would get an error. Passing variables with data between pages using URL There are different ways by which values of variables can be passed between pages. One of the ways is to use the URL to pass the values or data. Here the biggest advantage is we can pass data to a different site even running at different servers.

Comments
  • How to add app_name in urls.py
  • django.urls.exceptions.NoReverseMatch: '/auth_app' is not a registered namespace
  • you do: app_name: "some name" Here's is an example of what one of my urls.py looks like! from django.urls import path from . import views **app_name = "algorithms"** urlpatterns = [ path("posts/", views.blog_index, name="blog_index") ] make sure you include the app_name in your project URL as namespace="app_name"
  • Here's how my main urls.py look like: path("all_posts/", include("explain_algorithms.algo_explained.urls", namespace = "algorithms")),
  • You're also mixing old and new style urls. You should be using path
  • i am using urls with python 3.6
  • i mean, i am using url instead of path .................................................... urlpatterns=[ url(r'^function$',views.function,name="function"), url(r'^load_home$', views.load_home, name="load_home"), url(r'^load_login$', views.load_login, name="load_login"),]