Suppose you have this table structure: Patient -> PatientTag -> Tag A typical N:M relationship between patients and tags, PatientTag being the intermediate entity with both FKs. (PatientId and TagId
Is there a way to map a many-to-many relationship with properties on each item in the list specific to the relationship?The actual case I\'m trying to solve is this:
I am implementing a many-to-many mapping in grails using 3NF, Not using the hasMany or belongsTo property.
I have a class User. A user can be a friend with many other users. The relationship is mutual. If A is a friend of B then B is a friend of A. Also I want every relation to store additional data - for
Having two tables, \"users\" and \"lists\", and a many-to-many \"subscriptions\" table relating users to lists (thus having foreign keys user_id and list_id), what would be a single SQL query to find
I have a simple model with news and categories: class Category(models.Model): name = models.CharField()
I have a many to many relationship between A and B. (I know I can consider refactoring etc, but that\'s another matter).
When I test my many to many classes an error occurs: System.ApplicationException: Actual count does not equal expected count.
Is there a trick for visualizing a many to many assocation in the Visual Studio Class Desi开发者_运维知识库gner?
instead of talking let me talk with code: Dim Contact = Context.Contacts.Include(\"Phones\") Dim phone = Contact.Phones(0)
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