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Editorial Team
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Asked: 2026-05-13T00:29:50+00:00

I’m trying to get a one to many relationship mapped with the EF and

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I’m trying to get a one to many relationship mapped with the EF and for some reason it’s proving more difficult than usual. This is my EDMX and DB Schema. The reason I used an auto-increment key on the middle table is because I was told it’s difficult to use composite keys with the EF.

What I need is to be able to do (with a Course entity) someCourse.Students or (with a student entity) someStudent.Courses. Could anyone give me some pointers as to the best way of mapping this?

alt text http://img195.imageshack.us/img195/4053/schemacz.png
alt text http://img22.imageshack.us/img22/8193/edmx.png

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1 Answer

  1. Editorial Team

    If you remove the AssociationID column and make both the StudentID and CourseID the primary key of the StudentCourses table, it will pick up the many-to-many relationship and generate more intuitive entity classes (ie Student.Courses, Course.Students)

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