Django - A framework for prototypes with deadlines

Hands on with python's most-used web framework: did you ever wonder how some developers are able to deploy web apps so fast? While you are still writing your SQL queries to retrieve some data from the database they are already tinkering with the color of their front end buttons. Meet Django, the python framework for web developers with deadlines. In this session we will write our first simple Django app, explore the features of the Django ORM and see how you can write front-end templates.

Transcript

1. Marcel Neidinger
   API & Programmability Lead,
   Cisco EMEAR Systems Engineering
   28.01.2021
   A framework for prototypes with deadlines
   Django
   

   View Slide

2. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 2
   what is django
   django is an open source web
   framework – written in python –
   that follows the Model-View-
   Template (MVT) methodology and
   offers a Object-Relational Mapping
   (ORM) that can interact with a wide
   range of database systems. It pitches
   itself as suited for rapidly
   developing production-ready web
   applications.
   django
   

   View Slide

3. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 3
   what is django
   “web framework”
   

   View Slide

4. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 4
   what is django
   building a web app
   means
   database
   front-end
   admin
   API
   routing
   etc.
   

   View Slide

5. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 5
   insanity.
   

   View Slide

6. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 6
   Framework
   write it once and be done with it.
   

   View Slide

7. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 7
   what is django
   “Model-View-Template”
   

   View Slide

8. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 8
   what is django
   A wild request
   appears
   get data
   change data
   display data
   

   View Slide

9. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 9
   what is django
   get data
   change data
   display data
   model
   

   View Slide

10. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 10
    what is django
    get data
    change data
    display data
    view
    

    View Slide

11. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 11
    what is django
    get data
    change data
    display data
    template
    

    View Slide

12. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 12
    Model-View-Template
    Split the request into different repeatable parts
    

    View Slide

13. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 13
    what is django
    “Object-Relational Mapping”
    

    View Slide

14. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 14
    what is django
    SELECT * FROM
    User WHERE id=42
    

    View Slide

15. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 15
    insanity.
    

    View Slide

16. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 16
    what is django
    We all prefere
    objects
    ORM
    User
    +id:str
    +name:str
    +email:str
    CREATE TABLE User()
    

    View Slide

17. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 17
    what is django
    We all prefere
    objects
    ORM
    User
    +id:str
    +name:str
    +email:str
    SELECT * FROM User()
    

    View Slide

18. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 18
    Object-Relational-Mapping
    Writing SQL is overated. OOP is where it’s at.
    

    View Slide

19. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 19
    what is django
    “rapidly developing”
    

    View Slide

20. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 20
    what is django
    A (very) simple
    guestbook
    save entries
    display entries
    delete entries
    

    View Slide

21. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 21
    guestbook.ai
    The multi-billion dollar IPO is coming in 2024
    

    View Slide

22. View Slide

23. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 23
    • Writing your first django app - part 1
    https://docs.djangoproject.com/en/3.1/intro/tutorial01/
    Where to go now
    

    View Slide

24. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 24
    • Cover image: Photo by Stephan Seeber from Pexels
    Image Credit
    

    View Slide