sudhanshuptl / experimentingdjango

Learning Django

Notes

create virtusal env

• pyhton -m virtualenv env
• to activate .\envs\Scripts\activate

Create project_1

django-admin startproject project_name

Run server

python manage.py runserver

Create an APP

python manage.py startapp music

Model

• It is blueprint of databse tables

Views

• Take request from user and responce to user

###Sync databse with code (Migration)

• python manage.py migrate
• Need to add new app in settings.py 'music.apps.MusicConfig' where MusicConfig is class name of app
• after creating models in music app we need to migrate that changes python manage.py makemigrations then python manage.py migrate
• You can check actual query of above migration using python manage.py sqlmigrate music 0001 where 0001 is like query_id

Using database from command line

• python manage.py shell
• import Models from music.models import Song
• create an object a = Album(artist='Lata M',album_title='Love',genre='Evergreen',album_logo='https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTlQha7jRO5bqyFIPl02-UpBHVALKTZpvQXo2FTDkIt3S2DLM0K')
• Save object to database a.save()
• Print primary key of a a.id or a.pk assigned by default
• Update data a.artist='new artist
• Show all object in table Album.objects.all() ( Need to create strings method to specify , how to return the result of this commong __str__ function)
• Applying Filters : Album.objects.filter(id=1)
• Using Pattern Search Album.objects.filter(artist__startswith='Kishor')

Create Admin

Go to command prompt and python manage.py createsuperuser

• here username : admin and pass is daredevil

Adding Tables maintenance feature to admin block

• goto music\admin.py
• Import models from .models import Album,Song
• Register Models admin.site.register(Album)