26 lines
833 B
Python
26 lines
833 B
Python
from django.db import models
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from dbview.models import DbView
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class ModelA(models.Model):
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fielda = models.CharField()
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fieldc = models.IntegerField()
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class MyView(DbView):
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fieldA = models.OneToOneField(ModelA, primary_key=True,
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db_column='fielda__id')
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fieldB = models.IntegerField(blank=True, null=True, db_column='fieldb')
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@classmethod
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def view(klass):
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'''
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This method returns the SQL string that creates the view, in this
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example fieldB is the result of annotating another column
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'''
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qs = modelA.objects.all().\
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annotate(fieldb=models.Sum('fieldc')) .\
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annotate(fielda__id=models.F('pk')) .\
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order_by('fielda__id') .\
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values('fielda__id', 'fieldb')
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return str(qs.query)
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