several ways to create a simple url

1. example: to create a simple url with a BASE_URL veriable

# settings.py

BASE_URL = 'http://127.0.0.1:8000'

# views.py

from django.conf import settings

class CommentViewSet(SerializerClassMixin, ModelViewSet):

    def perform_create(self, serializer):
        project_pk = self.kwargs["project_pk"]
        issue_pk = self.kwargs["issue_pk"]

        issue_url = f"{settings.BASE_URL}/api/projects/{project_pk}/issues/{issue_pk}/"

2. example: create BASE_URL in your operating system

Define the base URL as an environment variable in your operating system. The process for this varies depending on your operating system. For example, in a Unix-based system like Linux or MacOS, you can add the following line to your shell profile file (like ~/.bashrc or ~/.bash_profile for Bash shell, ~/.zshrc for Zsh shell).

export BASE_URL="http://127.0.0.1:8000"

Then, source the profile file or restart your terminal to apply the changes:

source ~/.bashrc

In your Python script, use the os module to access the environment variable.

# views.py

import os

class CommentViewSet(SerializerClassMixin, ModelViewSet):
    BASE_URL = os.getenv("BASE_URL")

    def perform_create(self, serializer):
        project_pk = self.kwargs["project_pk"]
        issue_pk = self.kwargs["issue_pk"]

        issue_url = f"{BASE_URL}/api/projects/{project_pk}/issues/{issue_pk}/"

3. example: save the BASE_URL in an .env file

First, you need to install the python-dotenv module. You can do this using pip, which is a package manager for Python. Run the following command in your terminal.

pip install python-dotenv

This command installs the python-dotenv module, which allows you to specify environment variables in a .env file in your project directory.

Next, create a .env file in the root directory of your project. This file will contain your environment variables. Each variable should be defined on a new line in the format KEY=VALUE. In your case, you would add the following line to your .env file.

# .env

BASE_URL=http://127.0.0.1:8000

n your Python script, you can now use the load_dotenv function from the dotenv module to load the environment variables from the .env file. Then, you can use the os.getenv function to retrieve the value of the BASE_URL environment variable.

# views.py

import os
from dotenv import load_dotenv

class CommentViewSet(SerializerClassMixin, ModelViewSet):
    BASE_URL = os.getenv("BASE_URL")

    def perform_create(self, serializer):
        project_pk = self.kwargs["project_pk"]
        issue_pk = self.kwargs["issue_pk"]

        issue_url = f"{BASE_URL}/api/projects/{project_pk}/issues/{issue_pk}/"