Reverse for 'update_view' with no arguments not found. 1 pattern(s) tried: ['update_view/(?P<department_id>[0-9]+)/\\Z']

Using Django Mystery Errors
1

Trying to create an update function for a Department Model in Django but i’ve run into a problem. Here’s what i have so far

update view function

def department(request):
    data = main_collection.objects.all()
    filtered_data = []
    for datas in data:
        if datas.user_type.user_type in ['admin', 'employee']:
            filtered_entry = {
                'user_type': datas.user_type.user_type,
                'role': datas.user_type.user_type,
                'employee_first_name': datas.employee.first_name,
                'organization_name': datas.organization.org_name,
                'organization_id': datas.organization.id,
                'department_name': datas.department.department_name,
                'employee_id': datas.employee.id,
                'department_id':datas.department.id,
            }
            filtered_data.append(filtered_entry)

    # remove duplicated departmant name 
    unique_department = {entry['department_name'] for entry in filtered_data}
    filtered_data_unique =[]

    for entry in filtered_data:
        if entry['department_name'] in unique_department:
            filtered_data_unique.append(entry)
            unique_department.remove(entry['department_name'])
    
    manager_data = [entry for entry in filtered_data if entry['user_type'] == 'admin']

    return render(request, 'department/homee.html', {'data': filtered_data, 'manager':manager_data})





def add_view(request):
    #print("Reached add_view function----------------------------------------------------------------------------------------------------------------------------------------------------------------------")
    
    if not request.user.is_authenticated:
        messages.error(request, 'You are not logged in')
        return redirect('department_app:department')
    
    try:
        #print("Reached add_view function 22222222----------------------------------------------------------------------------------------------------------------------------------------------------------------------")

        if request.method == "POST":
            dep_name = request.POST.get('dep_name')
            organization_id = request.POST.get('organization_id')
            employee_name = request.POST.get('emp_first_name')
            org_name = request.POST.get('orga_name')
            employee_id = request.POST.get('employee_id')

            if dep_name and organization_id and employee_id:
                organization = get_object_or_404(Organization, pk=organization_id)
                employee = get_object_or_404(Employee, pk=employee_id)

                # Check if there's any department with NULL department_name for the given organization
                department = Department.objects.filter(department_name__isnull=True, organization=organization).first()

                if department:
                    # If a department with NULL name exists, update it
                    department.department_name = dep_name
                    department.manager = employee
                    department.save()  # Save the updated department
                    #print(f"Updated department '{dep_name}' with Employee ID: {employee_id} and Organization ID: {organization_id}")
                    messages.success(request, "Department Added Successfully!!!!!")
                    return redirect('department_app:department')
                    
                    # Debug output
                    #print(f"'{department.id}', '{department.department_name}', '{datetime.now()}', '{organization_id}', '{employee_id}'")
                else:
                    messages.error(request, f"Employee already exists with Department:{dep_name}")
                    
                    #print(f"Employee already exisite a Department'{dep_name}' with Employee ID: {employee_id} and Organization ID: {organization_id}")
                    # If no NULL department exists, create a new one
                    """department = Department.objects.create(
                        department_name=dep_name,
                        organization=organization,
                        manager=employee"""
                    
                    

                # Main collection entry is created after department is updated or created
                main_collection_entry = main_collection.objects.create(
                    department=department
                )
                
                # Debug print statement to confirm main_collection entry creation
                #print(f"main_collection entry created with ID: {main_collection_entry.id}")
                #print(f"'{main_collection_entry.id}', NULL, '{datetime.now()}', '{organization_id}', '{employee_id}'")

                #messages.success(request, 'Your department has been added or updated')
                return redirect('department_app:department')
            else:
                messages.error(request, 'Department name, organization ID, or employee first name is missing.')
                return redirect('department_app:add_view')
            
        return render(request, 'department/add.html')
    
    except Exception as e:
        messages.error(request, f'Error occurred: {str(e)}')
        return redirect('department_app:department')
    

def update_view(request, department_id):
    # Fetch the department using the ID
    try:
        department =main_collection.objects.get(id=department_id)
        if request.method =='POST':
            department_name = request.POST.get('dep_name')
            department.save()
    except Department.DoesNotExist:
        
        department = None

    # Pass the department data to the template
    return render(request, 'department/update.html', {'department': department})

i am calling the function to collecting department id from here
update.html

this is my
add_user.html
this line setting department id to edit

<a class="btn-edit-contact" data-id="{{ datas.department_id }}" data-bs-toggle="modal" data-bs-target="#upp">
                    <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-edit-2 edit">
                        <path d="M17 3a2.828 2.828 0 1 1 4 4L7.5 20.5 2 22l1.5-5.5L17 3z"></path>
                    </svg>
                </a>

urls.py

from django.urls import path
from apps.Department.views import department, add_view, update_view

app_name = "department_app"
urlpatterns = [
    path('department/', department, name='department'),
    path('add_view/', add_view, name='add_view'),
    path("update_view/<int:department_id>/", update_view, name="update_view"),
    
]




Error during template rendering
In template C:\Users\JULIAN\Desktop\hr-system-gen1\apps\Department\templates\department\add_user.html, error at line 3

Reverse for 'update_view' with no arguments not found. 1 pattern(s) tried: ['update_view/(?P<department_id>[0-9]+)/\\Z']
1	<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/css/bootstrap.min.css" rel="stylesheet">
2	
3	<form method="POST" action="{% url 'department_app:update_view' %}" enctype="multipart/form-data">
2

Welcome @juliandivakaran !

Your url is defined as:

This means that it requires that the update_view url be supplied with a parameter for the department_id.

But, you have:

You have not supplied that parameter in your url tag.

3

Could you please indicate the correct line?

4

here. i’m using the url

**<form method="POST" action="{% url 'department_app:update_view' department_id %}" enctype="multipart/form-data">**
    {% csrf_token %}
    <div class="modal fade" id="upp" tabindex="-1" aria-labelledby="addContactModalTitle" aria-hidden="true">
        <div class="modal-dialog modal-dialog-centered modal-lg">
            <div class="modal-content">
                <div class="modal-body" id="modal-content-body">
                    <h1>Update Department</h1>
                    <div class="row">
                        <div class="col-md-6 mb-3">
                            <input type="text" id="dep_name" name="dep_name" class="form-control" placeholder="Enter your Department" value="{{ department.department_name }}" required>
                        </div>
                        <div class="col-md-6 mb-3">
                            <input type="text" id="position_name" name="position_name" class="form-control" placeholder="Position Name" value="{{ department.position_name }}" required>
                        </div>
                        <div class="col-md-6 mb-3">
                            <input type="text" id="position_desc" name="position_desc" class="form-control" placeholder="Position Description" value="{{ department.position_desc }}" required>
                        </div>
                        <div class="col-md-6 mb-3">
                            <input type="text" id="mobile_number" name="mobile_number" class="form-control" placeholder="Mobile number" value="{{ department.mobile_number }}" required>
                        </div>
                    </div>

                    <input type="hidden" name="employee_id" value="{{ department.manager.id }}">
                    <input type="hidden" name="organization_id" value="{{ department.organization.id }}">
                    <input type="hidden" id="department-id" name="department_id"> <!-- This hidden input will hold the department id -->
                </div>
                <div class="modal-footer">
                    <button class="btn" data-bs-dismiss="modal"><i class="flaticon-delete-1"></i> Discard</button>
                    <button type="submit" class="btn btn-primary">Update</button>
                </div>
            </div>
        </div>
    </div>
</form>
5

That is different code from the original problem. You have to tell us when you change the code and get a different error.

6

I don’t think I can. Only you can determine what value you need there.

The variables available in the template are what you supply in the context. You need to decide what is in the context that will give you the value you need.

Having said that, in the common Django case, where the same view is used for both the GET and POST requests, you don’t need to specify the action attribute, since it defaults to the URL that was used to get the page originally.