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Showing posts with the label Django Orm

Django Manytomany Field Through With Extra Fields Does Not Show On Both Relations

I have a class Assembly class Assembly(models.Model): room = models.ForeignKey('Room',… Read more Django Manytomany Field Through With Extra Fields Does Not Show On Both Relations

Why I Am Getting An "(admin.e003) The Value Of 'raw_id_fields[n]' Must Be A Foreignkey Or Manytomanyfield." Error In Django App?

I want to make a schema migration, just add 1 field to Model and to ModelAdmin. class MyModel(model… Read more Why I Am Getting An "(admin.e003) The Value Of 'raw_id_fields[n]' Must Be A Foreignkey Or Manytomanyfield." Error In Django App?

Django Orm: How Count In Annotation Differ From Count On Query Set?

qs = ... qs = qs.annotate(v=Count('a', filter=Q(a__lt=5))) a = qs.first().v b = qs.filter(… Read more Django Orm: How Count In Annotation Differ From Count On Query Set?

Geodjango Query: All Point That Are Contained Into A Multi Polygon

I have two models: Model_A that contains a GeoDjango Point; Model_B that contains a GeoDjnago Mult… Read more Geodjango Query: All Point That Are Contained Into A Multi Polygon

How To Aggregate The Average Of A Calculation Based On Two Columns?

I want to write a Django query to give me the average across all rows in my table. My model looks l… Read more How To Aggregate The Average Of A Calculation Based On Two Columns?

How To Get Latest Unique Entries From Sqlite Db With The Counter Of Entries Via Django Orm

I have a SQLite db which looks like this: |ID|DateTime|Lang|Details| |1 |16 Oct | GB | GB1 | |2 … Read more How To Get Latest Unique Entries From Sqlite Db With The Counter Of Entries Via Django Orm

Annotate Custom SQL Function (similar To Date_trunc) To Django ORM Queryset

I am using timescaledb which is basically just an extension for postgres. It comes with a SQL funct… Read more Annotate Custom SQL Function (similar To Date_trunc) To Django ORM Queryset