[PYTHON] Read the function name from the DB and execute it dynamically

Folder structure

project
  |
　├ __init__.py
　├ apps.py
　├ models.py
　├ routes.py
　├ views.py

Create a Model

First, specify the class that represents the function list in models.py.

from django.db import models
from django.db.models.signals import post_save

class FuncList:

    func_id = models.CharField(max_length=50)
    callback = models.CharField(max_length=50)

    def get_func_id(self):
        return self.func_id

    def set_func_id(self, func_id):
        self.func_id = func_id
        self.save()

    def get_callback(self):
        return self.callback

    def set_callback(self, callback):
        self.callback = callback
        self.save()

Save / read to DB and dynamically execute

# Save to DB
def save_function(**kwargs):

    func_list = FuncList()

    func_list.set_func_id(kwargs['func_id'])
    func_list.set_callback(kwargs['callback'])

    return

# Dynamic execution
def dynamic_execution(arg1, arg2):

 # Function that executes the function read from DB
    def execution_handler(func, **kwargs):
        return func(**kwargs)

 #Get function list from DB
    func_list = FuncList.objects.all()

    for i in range(len(func_list)):
 # Execute the acquired functions in order
        result = execution_handler(func=eval(func_list[i].callback),
            arg1=arg1, arg2=arg2)

    return result

Afterword

I didn't have enough words, but thank you for coming to see it. Any questions in this article can be supplemented at the following sites. ~~ ・ ・ ・ Maybe ~~

• Django Reverse Cheat Sheet
• Django: Model Field Reference
• Use callback function in Python