Entity Framework Feature Suggestions

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  1. Support for generic type entities

    Pseudocode to illustrate:

    public abstract class BaseGenericClass<T> where T : class {}

    public class DerivedGenericClass: BaseGenericClass<Foo> {}

    public class DerivedGenericClass: BaseGenericClass<Bar> {}

    public DbSet<BaseGenericClass<>> genericClassDbSet;

    22 votes
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      0 comments  ·  Flag idea as inappropriate…  ·  Admin →
    • Support unsigned integer (e.g. uint) properties and keys

      If my model contains an int ID it's automatically detected as a Key field.
      I'd like to have the same support for uint ID and similar types.

      21 votes
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        4 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →

        This is actually going to be supported in EF7, with a few caveats:

        1. We won’t try to automatically convert values to different types to compensate for lack of native support in the underlying data provider, so for the particular case of SQL Server we won’t have support for unsigned integers, at least at first.
        2. EF7 is a new codebase and not a superset of EF6 (see http://blogs.msdn.com/b/adonet/archive/2014/10/27/ef7-v1-or-v7.aspx) so existing applications built against EF6 won’t benefit without porting.

      • Edmx from dbproj

        In a large enterprise environment we use vs2010 dbproj to maintain schema objects. The workflow to re-create after changes to schema requires us to deploy a db schema run edmgen2 and re-import all exiting functions and rebuild complex types. Provide a tool that reads dbschema to build edmx and retains functions and complex types if no changes in signatures

        21 votes
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          0 comments  ·  tools  ·  Flag idea as inappropriate…  ·  Admin →
        • More informatin from referential integrity constraint violation exception

          I get so frustrated by the referential integrity constraint violation and the fact that the exception thrown contains no information about which fields are causing the problem.

          Here's the full message for reference:
          "A referential integrity constraint violation occurred: The property values that define the referential constraints are not consistent between principal and dependent objects in the relationship."

          Could you please update this exception to provide some key information so that we can track this issue down?

          Thanks,
          -Aaron

          21 votes
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            0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
          • Foreign Key naming should use suffix 'Id' (or configurable string)

            When generating a model from a database using foreign keys, the model generator ends up calling the foreign key id field 'blah' and the navigation property 'blah1'. Instead the generator should use 'blahId' (or configurable suffix) for the foreign key numeric and 'blah' for the navigation property to make the accessing functions more obvious to developers

            20 votes
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              1 comment  ·  Flag idea as inappropriate…  ·  Admin →
            • Updateable Views

              I would like to see update-able views. This is available in Telerik ORM, and I have found it very helpful in situations where I initially assumed a grid would only need to display read only data, but was months later asked to allow editing.

              There are other ways to do this of course, but they require recoding. This would make certain maintenance tasks easy.

              19 votes
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                1 comment  ·  Flag idea as inappropriate…  ·  Admin →
              • 19 votes
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                  1 comment  ·  Flag idea as inappropriate…  ·  Admin →
                • 19 votes
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                    0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                  • Compiled Code First

                    The current EDMX designer doesn't work well for enterprise scenarios - it becomes incredibly cumbersome as the number of entities grows. For example:
                    * It forces the developer to arrange entities visually - once you get over about 10 entities or complex relationships between them, it becomes difficult to do.
                    * It's difficult to find entities - rather than scan for them alphabetically, I need to scroll around a complex diagram I don't really want.
                    * The wizards get in the way - updating my model continually prompts me to modify my connection strings, I need to manually select the…

                    19 votes
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                      1 comment  ·  tools  ·  Flag idea as inappropriate…  ·  Admin →

                      Updating the title. The part about reverse engineering a database into a Code First model is included into our VS tooling in EF 6.1. I mark that as completed and split the part about having a “compiled” Code First model that loads very fast, but splitting ideas is not supported in UserVoice :)

                    • Be able to configure initial value for identity column

                      Currently when configuring Identity columns we can't declare the initial value. It would be nice to add an option in order to specify the initial value. This is not respected when we reverse engineer an existing database as well

                      19 votes
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                        0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                      • 19 votes
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                          2 comments  ·  Flag idea as inappropriate…  ·  Admin →
                        • Customize ModelObjectItemWizard to be able to add new items

                          I want to be able to customize Microsoft.Data.Entity.Design.VisualStudio.ModelWizard.ModelObjectItemWizard
                          So I can add my custom items to Microsoft.Data.Entity.Design.VisualStudio.ModelWizard.Gui.ModelBuilderWizardForm like I show on this updated screenshot
                          http://clip2net.com/clip/m407107/8fb72-entity-framework-wizard-customization2-35kb.png?nocache=1

                          In particular I want to add "ASP.NET Identity 2.0 EF Designer model" which will already contain all the entities required for ASP.NET Identity 2.0 to work.

                          18 votes
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                            0 comments  ·  tools  ·  Flag idea as inappropriate…  ·  Admin →
                          • Updating the F# SqlEntityConnection Type Provider for EF 6

                            The F# SqlEntityConnection Type Provider is a third way to interact with Entity framework (with the other two being an .edmx file and Code First).
                            http://msdn.microsoft.com/en-us/library/hh362322.aspx

                            This Type Provider doesn't support the updated low-level API changes that EF 6 requires, as far as I can tell. I'd love to have an updated version that supports the async features of EF 6.

                            18 votes
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                              1 comment  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                            • Map multiple entities to same table

                              I should be able to map multiple models to the same table. For example consider a User table. I may have a model for logging in, changing a password, resetting a password and maintaining a user. I would normally create different domain models for each of these use cases. However, I am not able to map these models to a single table.

                              Here is a link with a workaround by MSFT, but would like to avoid workaround...
                              http://social.msdn.microsoft.com/Forums/en/adodotnetentityframework/thread/0f65caae-8a66-431f-aa02-4b2c68f871e9

                              18 votes
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                                0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                              • Add FILEGROUP Support

                                It should be possible to create tables, indices, etc. on different file groups in order to improve performance.

                                18 votes
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                                  0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                                • Support for SQL Server Change Data Capture -- or at least tables with no primary keys

                                  Change Data Capture is one of the coolest features in SQL Server 2008+. I know it's not core to tailor things for one database technology, but this feature is completely unsupportable in the current EF because EF doesn't allow tables without PKs (and the tables SQL Server gens for CDC have no PKs). Ideally, some sort of real support would be allowed that would allow for some sort of Entity.CDC or something that would string together the tables that an entity uses ... but that is probably a bridge too far.\

                                  17 votes
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                                    0 comments  ·  tools  ·  Flag idea as inappropriate…  ·  Admin →
                                  • Ability to intercept and cancel changes to properties

                                    (Note that the original description of this idea talked about making PropertyChangingEventArgs cancellable. Although this is an interesting request, it is not a change we could implement in EF. In fact, there is probably not way it can be implemented in .NET without defining a new standard interface for change tracking)

                                    Rather than declining the idea, I am renaming it to capture the essence that is still potentially applicable to EF: provide a hook that can be used by an application or library to intercept what happens whenever EF detects that a property of a tracked object is being changed…

                                    17 votes
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                                      3 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                                    • Ship symbols (pdb) for EntityFramework 6.X

                                      How painful that I can't step into the EF souce code to debug an issue I'm seeing.

                                      17 votes
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                                        0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                                      • Ability to intercept when an association is being changed

                                        There should be an AssociationChanging in System.Data.Objects.DataClasses.RelatedEnd class, so I can validate before items get attached to a relation.

                                        17 votes
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                                          2 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                                        • SqlDependency / query notification

                                          in ADO.NET classic thers an option to get a notification from SQL when data changes in the database, using the SqlDependency class for specific queries. i would like to see this supported in the next EF

                                          17 votes
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                                            0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
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