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Showing posts with the label Django Orm

Django: Return One Filtered Object Per Foreign Key

Is it possible to return querysets that return only one object per foreign key? For instance, I wa… Read more Django: Return One Filtered Object Per Foreign Key

How To Add Filters To A Query Dynamically In Django?

In my viewSet I am doing a query, queryset= Books.objects.all(); Now from an ajax call I get my fi… Read more How To Add Filters To A Query Dynamically In Django?

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

Save List Of Records And Fields Into Django Model

I receive this list from my website admin: [['present', '2'],['present', &#… Read more Save List Of Records And Fields Into Django Model

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?

Per-transaction Isolation Level In Django Orm

Is it possible to set isolation level for custom transaction (but not with raw sql)? For example, s… Read more Per-transaction Isolation Level In Django Orm

Django: M2m_changed Not Fired When End Of Relation Is Deleted

NOTICE: due to production environment constraints, I must stick to django-1.4 for the moment. I'… Read more Django: M2m_changed Not Fired When End Of Relation Is Deleted

In Django Orm, "values" And "annotate" Are Not Working To Group By

I have a table like this: Now I want to sum up the meals on each date. I have written the code bel… Read more In Django Orm, "values" And "annotate" Are Not Working To Group By

Django - Multiple Db + Multiple Models

I have two databases and two models:one the admin and the is user. I want to sync my models to the … Read more Django - Multiple Db + Multiple Models

When Does Django Look Up The Primary Key Of Foreign Keys?

I have two simple models, one representing a movie an the other representing a rating for a movie. … Read more When Does Django Look Up The Primary Key Of Foreign Keys?

Comparing Object Fields With Django's ORM

Is comparing columns in different tables using less-than/greater-than operators supported in Django… Read more Comparing Object Fields With Django's ORM

Per-transaction Isolation Level In Django ORM

Is it possible to set isolation level for custom transaction (but not with raw sql)? For example, s… Read more Per-transaction Isolation Level In Django ORM

Django ORM - LEFT OUTER JOIN With Two Columns?

This is the relevant code: class Book(models.Model): name = models.CharField(max_length=50) c… Read more Django ORM - LEFT OUTER JOIN With Two Columns?