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many-to-many

ASP.NET MVC CORE – Many to many relations – Create Views

September 3, 2022 by Magenaut

So, I’ve a situation where I have a Many-to-many relation between two entities. In the middle, there are fields that caracterize the relation. I will simplify the situation with the following example (in bold a simple field that is in between both entities:

Categories ASP.NET, Q&A Tags asp.net, asp.net-core, asp.net-mvc, many-to-many Leave a comment

What is related_name used for?

August 21, 2022 by Magenaut

What is the related_name argument useful for on ManyToManyField and ForeignKey fields? For example, given the following code, what is the effect of related_name='maps'?

Categories Python, Q&A Tags django, foreign-keys, many-to-many, python Leave a comment

How do I access the child classes of an object in django without knowing the name of the child class?

August 19, 2022 by Magenaut

In Django, when you have a parent class and multiple child classes that inherit from it you would normally access a child through parentclass.childclass1_set or parentclass.childclass2_set, but what if I don’t know the name of the specific child class I want?

Categories Python, Q&A Tags django, many-to-many, python Leave a comment

SQLAlchemy ManyToMany secondary table with additional fields

August 12, 2022 by Magenaut

I have 3 tables: User, Community, community_members (for relationship many2many of users and community).

Categories Python, Q&A Tags flask-sqlalchemy, many-to-many, orm, python, sqlalchemy Leave a comment
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