Would be cool, if you could go deeper into how to structuring larger applications in a sailable and maintanable way. Including folder structure, business logic, validation... There are a lot of beginner tutorials. But it is much harder to find advanced tutorials.
As this post is 2 years old, keen to know 2 things: 1- Did you guys get a decent job or create a decent website that scaled well? 2- Maybe you can now answer your own question for me? I've been working on a large django project for 8 months and now have to make a massive database change because of a database design flaw. It'd be good to hault my progress and learn scalability concepts before I continue to prevent this from happening again. Thanks
This is a very good tutorial, i would suggest you make it a series whereby you cover this kind of Django specialized concepts that are not usually covered in general tutorials. You pick them same as you picked signals and focus only on them per video. it would have been nice if you also cover m2m signals. Thank you.
I would like to see a deep dive into Channels because there seems to be little to no in depth explainations with the same way you present the details which is so unique and understandable
I understood how to use signals. That was a great explanation. Thank you. I'd like to place a practical question, if I may: I don't see why I would implement the behaviours on BlogPost using signals. Why not override the save method (for instance) on the model itself? It seems to me a much cleaner workflow for the example you presented. By overriding the method I'd have all the class related behaviour in one place under the umbrella of the class itself. I can see the utility for signals when dealing with a layered architecture and I don't want to inject code of a higher layer into a lower layer (which shouldn't know anything about its clients). The first example, triggering actions based on User creation, matches perfectly this scenario. I know your intention is to bring a didactical example to showcase the signals. I'm just elaborating on this on my side. Congrats for the great content!
@@CodingEntrepreneurs Hi, thanks for replying. I read your blog post. I think the example you mention there is similar (you provide handlers for a class defined in another file) to the User example you use in the video, which for me is ok. What is making me think is the Blogpost model. In this case I'm trying to figure out what makes more sense.
About adding slugs to an instance, doesn't using signals seems a little bit overkill, I mean I'm always overriding the save() method in the Model, check if there's a slug on the instance, if not, slugify the title, add it as an attribute to the instance and call the super save
Hi sir, Big fan of you and your tutorial. I have a request on Django framework. I have searched CZcams and google about booking system with Django. But I did not get proper instruction how to do that. If you upload tutorial about that, it will be very grateful. Thank you, sir. 🥰🥰🥰
Great Tutorial! Helped me achieve some King of business logic in an Invoice and Stock Management System. But How To notify user in a django template in realtime like maybe the user x has been deleted or Added ?
25:22 He says, "actually that doesn't cover all types of delete". That means that when you delete multiple objects(using multiple checkboxes in django admin), def delete () would not work there. It only works on single object. Hope this clears someone doubt.
Nice tutorial as always 😉 Thanks for sharing. I have one query regarding usage of signals in a distributed environment. Let's say we are running django in multiple processes via docker or something and these signals are run inside the same process in which the model was created. So how to handle scenarios for failover. Like if the process got crashed without executing let's say the post save signal. And when it restarts, the signal is lost but model got saved. Any ideas on these scenarios?
Here is some challenge i guess How to pass additional data to the signal For example we have default user model and while user registration we are also asking for some additional data like phone number, DOB, etc ..these additional data needed to pass to the signal
Thank you for the great content. Will django signal works if i have to give access to students which was registered by teacher in school management system. Haven't seen tutorials taking about this. I would be very grateful if you give some idea. Thank you 🙏🙏🙏🙏
what's the best way to implement dependant drop-down chained field in a django form(like: country->city and category->subcategory) retrieving data from db. i personally have difficulty to get the response back and populate the field(although i followed some examples but not happening). thank
4 years ago I got into IT because of you and surprised to see such less subscribers. you deserve a lot more.
Thank you but hearing you got into IT because of my videos is worth 100mil subs.
Hi DIvakaryadav shall we connect on LinkedIn?
Would be cool, if you could go deeper into how to structuring larger applications in a sailable and maintanable way.
Including folder structure, business logic, validation...
There are a lot of beginner tutorials. But it is much harder to find advanced tutorials.
I really second this. Everywhere you go to is a bunch of beginner vidoes...We could use a bit more complexity right now
yeah man actually needed!
Two Scoops of Django 3.x
As this post is 2 years old, keen to know 2 things:
1- Did you guys get a decent job or create a decent website that scaled well?
2- Maybe you can now answer your own question for me?
I've been working on a large django project for 8 months and now have to make a massive database change because of a database design flaw. It'd be good to hault my progress and learn scalability concepts before I continue to prevent this from happening again.
Thanks
Thank you for the help understanding signals! helped me out a lot. caught you slipping there tho at 17:02.
This is a very good tutorial, i would suggest you make it a series whereby you cover this kind of Django specialized concepts that are not usually covered in general tutorials. You pick them same as you picked signals and focus only on them per video. it would have been nice if you also cover m2m signals. Thank you.
Thanks. Thank you a lot. Thank you so mush. I have searched for two weeks for that, and finally find it and understand it. Thank you
Deep drive into full stack testing. Testing views, models, forms, etc.
best explaination
You are amazing. Thank you very much for the effort of teaching in very simplified way. Iam learning a lot from you. Thank you.
Very good and simple explanation.
thx very much for subtitles
Thank you very much man.
I would like to see a deep dive into Channels because there seems to be little to no in depth explainations with the same way you present the details which is so unique and understandable
Very helpful video
Thankyou justin this is helpful
Best signals introduce for beginners ever 🎉😊
Very good explanation.
thanks for sharing this idea. you help me a lot!!!!
Thanks my dear brother... Very good examplez
Thanks a lot.. Well clear explanation
he is not a teacher, he is more than a teacher the way he teaches is awesome
Thank you bro for the amazing content)
great tutorial, keep it going :D
Great job, thank you
I understood how to use signals. That was a great explanation. Thank you.
I'd like to place a practical question, if I may:
I don't see why I would implement the behaviours on BlogPost using signals. Why not override the save method (for instance) on the model itself?
It seems to me a much cleaner workflow for the example you presented. By overriding the method I'd have all the class related behaviour in one place under the umbrella of the class itself.
I can see the utility for signals when dealing with a layered architecture and I don't want to inject code of a higher layer into a lower layer (which shouldn't know anything about its clients). The first example, triggering actions based on User creation, matches perfectly this scenario.
I know your intention is to bring a didactical example to showcase the signals. I'm just elaborating on this on my side.
Congrats for the great content!
Thanks. Here are my thoughts on this exactly : www.codingforentrepreneurs.com/blog/post-save-vs-pre-save-vs-override-save-method
I haven’t changed my view on this either :)
And the official docs: docs.djangoproject.com/en/3.1/topics/db/models/
@@CodingEntrepreneurs Hi, thanks for replying.
I read your blog post. I think the example you mention there is similar (you provide handlers for a class defined in another file) to the User example you use in the video, which for me is ok.
What is making me think is the Blogpost model. In this case I'm trying to figure out what makes more sense.
About adding slugs to an instance, doesn't using signals seems a little bit overkill, I mean I'm always overriding the save() method in the Model, check if there's a slug on the instance, if not, slugify the title, add it as an attribute to the instance and call the super save
thanks
Please make a video about business logic in django. Some people believe that business logic should be in the Models
awesome video
Hi sir, Big fan of you and your tutorial. I have a request on Django framework. I have searched CZcams and google about booking system with Django. But I did not get proper instruction how to do that. If you upload tutorial about that, it will be very grateful. Thank you, sir. 🥰🥰🥰
21:25 Would be good if you included that video link in description. Couldn't find it.
You're right. It's here cfe.sh/projects/time-tasks-2
Thank you
@@CodingEntrepreneurs Thank you so much ♥♥♥♥
Great Tutorial! Helped me achieve some King of business logic in an Invoice and Stock Management System. But How To notify user in a django template in realtime like maybe the user x has been deleted or Added ?
Make a notifications app with models for the user
There’s a third party one called Django-notify I believe
Can you cover Signals for foreignkeyfield
25:22 He says, "actually that doesn't cover all types of delete".
That means that when you delete multiple objects(using multiple checkboxes in django admin), def delete () would not work there.
It only works on single object.
Hope this clears someone doubt.
Is this same process,if our project is live
got question.
Instance is not given an ID until you save it.
But how is the condition working in blog_post_pre_save() model?
So Justin Bro, This acts like a trigger that is used in relational SQL tables servers like Mysql, PostgreSQL and etc
im still confused as a first timer learning django but im less confused compared to 45 minutes ago thanks
Nice tutorial as always 😉
Thanks for sharing. I have one query regarding usage of signals in a distributed environment.
Let's say we are running django in multiple processes via docker or something and these signals are run inside the same process in which the model was created.
So how to handle scenarios for failover. Like if the process got crashed without executing let's say the post save signal. And when it restarts, the signal is lost but model got saved.
Any ideas on these scenarios?
Here is some challenge i guess
How to pass additional data to the signal
For example we have default user model and while user registration we are also asking for some additional data like phone number, DOB, etc ..these additional data needed to pass to the signal
Thank you for the great content.
Will django signal works if i have to give access to students which was registered by teacher in school management system. Haven't seen tutorials taking about this. I would be very grateful if you give some idea. Thank you 🙏🙏🙏🙏
The Signals I used based on models, not users. So you can use it for what you’ve said. Why not experiment on your own?!
@@CodingEntrepreneurs Thank you so much sir. I learn a lot from your channel. May you reach million subscriber ASAP.
Why signals work only when we put them in the models.py file?
Please help me,
signal m2m_changed post_remove does not work for me
can we use django signals to send notifications also
Never dissappoints like always
Thanks for the tutorial. Any chance you update your DRF course on Udemy?
how can I implement django signals in docker?
Is this same process,if our project is live
what's the best way to implement dependant drop-down chained field in a django form(like: country->city and category->subcategory) retrieving data from db. i personally have difficulty to get the response back and populate the field(although i followed some examples but not happening). thank
did you try smart_select library?it has a chainedfield functionality
Why Python Ecommerce.com site not working?
hey.. sir is it work django with mysql database
🥰
NSFW warning at 17:00 xD
i literally came down to type that thing XD
Is server side rendering possible with django, if then plz do a tutorial :)
I believe django already uses server side rendering for the templates, they are giving them raw
17:02 :)
Video title: "But how do DJANGO signals work?"
Video: "Here's how to use Django signals"
Nice clickbait.
Translate for Arabic please
.