A simple Django app to handle database views.
Project description
A simple pluggable application that allows to work with database views.
Quick start
Install the package:
pip install django-database-view
In your models.py create classes which extend dbview.models.DbView like this:
from django.db import models from dbview.models import DbView class ModelA(models.Model): fielda = models.CharField() fieldc = models.IntegerField() class MyView(DbView): fieldA = models.OneToOneField(ModelA, primary_key=True, db_column='fielda__id') fieldB = models.IntegerField(blank=True, null=True, db_column='fieldb') @classmethod def view(cls): """ This method returns the SQL string that creates the view, in this example fieldB is the result of annotating another column """ qs = modelA.objects.all( ).annotate( fieldb=models.Sum('fieldc'), ).annotate( fielda__id=models.F('pk'), ).order_by( 'fielda__id', ).values( 'fielda__id', 'fieldb', ) return str(qs.query)
Alternatively get_view_str method could be used to write a custom SQL:
class MyView(DbView): # ... @classmethod def get_view_str(cls): return """ CREATE VIEW my_view AS ( SELECT ... )"""
Then create a migration point for your view generation, edit that migration and modify it, add: from dbview.helpers import CreateView and replace the line the call to migrations.CreateModel with CreateView.
Migrate your database and start using your database views.
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