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I have a declarative class structure that looks like this: class BaseClass(Base): Column A … Read more Sqlalchemy Joined Inheritance Query Based On Mixin Column

Let's say I have a ROOMS table with width and length columns, and a corresponding SQLAlchemy mo… Read more Sqlalchemy Orm: Sum Of Products

I am working on an application where my database objects often have multiple parents and multiple c… Read more How Can I Write A Sqlalchemy Query That Will Return All Descendants Of A Node In A Graph?

I've successfully installed cx_Oracle on pypy using official patch. Now, everytime, django trie… Read more Pypy: Positional And Named Binds Cannot Be Intermixed

I have a database model like, with a ForeignKey field. From this model I created a form with class… Read more Django Form Foreignkey Database Field Not As Dropdown

I was asking for a problem I had in SQLAlchemy and found the solution while writing. I post it anyw… Read more Sqlalchemy How To Filter By Children In Many To Many

I have this model: class Person(models.Model): something ... employers = models.ManyToManyF… Read more Django Related_name Not Found

i want to add some records to another table model without duplicated it i create a function to chec… Read more How To Prevent Duplicated Records And Only Update It?