Entity Framework Feature Suggestions

Welcome! You can use this site to tell the Entity Framework team what features you want to see in future versions.

Remember that this site is only for feature suggestions and ideas!

If you have technical questions or need help with EF try StackOverflow or visit our forums.

If you want to report a bug you found in EF use the Entity Framework project page on CodePlex.

If you want to find more information about the Entity Framework go to our MSDN site.

Entity Framework Feature Suggestions

You've used all your votes and won't be able to post a new idea, but you can still search and comment on existing ideas.

There are two ways to get more votes:

  • When an admin closes an idea you've voted on, you'll get your votes back from that idea.
  • You can remove your votes from an open idea you support.
  • To see ideas you have already voted on, select the "My feedback" filter and select "My open ideas".
(thinking…)

Enter your idea and we'll search to see if someone has already suggested it.

If a similar idea already exists, you can vote and comment on it.

If it doesn't exist, you can post your idea so others can vote on it.

Enter your idea and we'll search to see if someone has already suggested it.

  1. Allow adding fluent code to each entity, to minimize the mess in the context

    There should be a way (perhaps by implementing an interface), to add fluent code separately to each entity instead of adding it all in the OnModelCreating method.
    The OnModelCreating base method should call all the entities that implement that interface and call OnModelCreating(context) of it.
    In this way the bunch of fluent code in the main context, especially if it's a large one, would tidy up in the individual entities.
    Of course, this is already simply doable, but I think this should go out the box.

    6 votes
    Vote
    Sign in
    Check!
    (thinking…)
    Reset
    or sign in with
    • facebook
    • google
      Password icon
      I agree to the terms of service
      Signed in as (Sign out)
      You have left! (?) (thinking…)
      1 comment  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
    • Allow stored procedures to be used to navigate relationships

      There are many developers who are in shops that don't allow non-stored procedure calls to SQL Server. It would be really nice if there was something in EF where we could select a relationship in the EF designer, go to its mapping and select a stored procedure for each role in the relationship. It might go something like this:

      1.We would create a relationship between two entitties, say Author and Book. Both entities would be required to expose foreign keys (the developer can make them private if they want).
      2.A stored procedure would be created that would navigate from each…

      6 votes
      Vote
      Sign in
      Check!
      (thinking…)
      Reset
      or sign in with
      • facebook
      • google
        Password icon
        I agree to the terms of service
        Signed in as (Sign out)
        You have left! (?) (thinking…)
        0 comments  ·  Flag idea as inappropriate…  ·  Admin →
      • Provide Refactor Into Existing Complex Type

        In the designer we can Refactor Into New Complex Type, but once we have done this we cannot Refactor all other instances into Existing Complex Type.

        6 votes
        Vote
        Sign in
        Check!
        (thinking…)
        Reset
        or sign in with
        • facebook
        • google
          Password icon
          I agree to the terms of service
          Signed in as (Sign out)
          You have left! (?) (thinking…)
          0 comments  ·  tools  ·  Flag idea as inappropriate…  ·  Admin →
        • Use CTE (with clause) instead of derived tables in generated queries.

          SQL Generated code would be much more readeable if you would use common table expressions instead of derived table. Just choose the name you want for the CTE and move the code generated for the derived table into the CTE, and replace the derived table expression by the name of the CTE. The resulting code is then no more indented. You can also take the opportunity to properly name the CTE to give an hint about which part of the linq expression result in the CTE generation. This improvement should not be complex to implement, and would help us and…

          6 votes
          Vote
          Sign in
          Check!
          (thinking…)
          Reset
          or sign in with
          • facebook
          • google
            Password icon
            I agree to the terms of service
            Signed in as (Sign out)
            You have left! (?) (thinking…)
            0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
          • Foreign key (from attribute and fluent) without navigation property

            Right now you have to define a navigation property set a foreign key constraint on a column.
            For people that want to achieve some independence from EF (using the repository pattern, for example, and a key-value store as a possible alternative), plainer POCOs with just ids are important.
            For example, with the repository pattern, I am right now able to use the same data classes and the same IRepository for an EF backed data store and a Redis-backed one.

            Defining a foreign key without the navigation property is still important and useful for data integrity.

            If could be something like …

            6 votes
            Vote
            Sign in
            Check!
            (thinking…)
            Reset
            or sign in with
            • facebook
            • google
              Password icon
              I agree to the terms of service
              Signed in as (Sign out)
              You have left! (?) (thinking…)
              0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
            • Add Language Pack's or the possibility to create your own.

              At this moment there are no Language Pack's available for EF5. (found a link for version 4.1 but none higher)

              As a workaround I'm implementing custom Data Annotation's on the entities.

              It would be great if I could create my own language pack for Dutch.

              6 votes
              Vote
              Sign in
              Check!
              (thinking…)
              Reset
              or sign in with
              • facebook
              • google
                Password icon
                I agree to the terms of service
                Signed in as (Sign out)
                You have left! (?) (thinking…)
                0 comments  ·  Flag idea as inappropriate…  ·  Admin →
              • create an secondary index from edmx designer tool for generate database

                when create a database from model some times need create secondary index for restrict some case of data

                6 votes
                Vote
                Sign in
                Check!
                (thinking…)
                Reset
                or sign in with
                • facebook
                • google
                  Password icon
                  I agree to the terms of service
                  Signed in as (Sign out)
                  You have left! (?) (thinking…)
                  1 comment  ·  tools  ·  Flag idea as inappropriate…  ·  Admin →
                • Support read-only mapping to tables without key

                  Allow mapping of database views without requiring the Key Attribute

                  When mapping entitis to Views, it´s common that no Key can be set, bescause the view does not provide it and you can´t map it. The idea is:

                  * Make it possible to map to Views (or tables) in a read only fashion that does not require the Key Attribute

                  6 votes
                  Vote
                  Sign in
                  Check!
                  (thinking…)
                  Reset
                  or sign in with
                  • facebook
                  • google
                    Password icon
                    I agree to the terms of service
                    Signed in as (Sign out)
                    You have left! (?) (thinking…)
                    0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                  • 6 votes
                    Vote
                    Sign in
                    Check!
                    (thinking…)
                    Reset
                    or sign in with
                    • facebook
                    • google
                      Password icon
                      I agree to the terms of service
                      Signed in as (Sign out)
                      You have left! (?) (thinking…)
                      1 comment  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                    • Instantiate "many" nav properties with empty list

                      I've found that in Code First entities, my "many" properties such as

                      property List<People> SomePropertyName {get; set;}

                      are null when the entity is instantiated. This breaks the common "convention" of just simply adding entities to the list:

                      You can't just
                      MyEntity.SomeManyProperty.Add(SomeOtherEntityInstance);

                      You have to do
                      MyEntity.SomeManyProperty = new List<SomeOtherEntity> { SomeOtherEntityInstance };

                      but, of course, you can't just do that, because you might wipe out an existing list, if there is one, so you must then do a check first. Ugly.

                      As a lesser evil, I've resorted to instantiating empty lists in the constructor of my entities but this is…

                      6 votes
                      Vote
                      Sign in
                      Check!
                      (thinking…)
                      Reset
                      or sign in with
                      • facebook
                      • google
                        Password icon
                        I agree to the terms of service
                        Signed in as (Sign out)
                        You have left! (?) (thinking…)
                        4 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                      • Use names defined in linq query in generated sql

                        Currently if you have something like

                        select new { Year = c.DateEntered.Year }

                        the generated sql uses C1 for the column name. I would find it very useful if the used Year.

                        6 votes
                        Vote
                        Sign in
                        Check!
                        (thinking…)
                        Reset
                        or sign in with
                        • facebook
                        • google
                          Password icon
                          I agree to the terms of service
                          Signed in as (Sign out)
                          You have left! (?) (thinking…)
                          0 comments  ·  tools  ·  Flag idea as inappropriate…  ·  Admin →
                        • Support custom materialization of objects

                          Support custom materialization of objects

                          Currently, there is no way (at least that I can find) to support a custom means of materializing an object.

                          The primary use case for me currently, is that I would like to support *truly* immutable complex types in my domain model.

                          Currently I can only get 'immutability" by providing less accessible setters and a default constructor (which can be private).

                          I would like to be able to specify custom materialization, so that when entity framework loads a "Foo", I can tell it to use a specific, non-default constructor.

                          For example:

                          //Complex Value Object
                          class…

                          6 votes
                          Vote
                          Sign in
                          Check!
                          (thinking…)
                          Reset
                          or sign in with
                          • facebook
                          • google
                            Password icon
                            I agree to the terms of service
                            Signed in as (Sign out)
                            You have left! (?) (thinking…)
                            0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                          • Cross Model Navigation Properties

                            I've read http://blogs.msdn.com/b/adonet/archive/2008/11/25/working-with-large-models-in-entity-framework-part-2.aspx

                            but, it's a total mission and I haven't had enough time to get it working. I'd like to add an association which bridges two models using the designer. Both models contain tables from the same database.

                            6 votes
                            Vote
                            Sign in
                            Check!
                            (thinking…)
                            Reset
                            or sign in with
                            • facebook
                            • google
                              Password icon
                              I agree to the terms of service
                              Signed in as (Sign out)
                              You have left! (?) (thinking…)
                              0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                            • Sort and autoformat xml inside .edmx files before saving via EF Designer

                              Need the EF designer to generate nodes inside .edmx file in exactly the same order they are present in the database (currently a list of entity properties is saved in reverse order in mappings section, also when you update the model from the database schema the ordering is messed up). Also before saving .edmx file EF Designer should auto format the document. This would help significantly with branching, merging and resolving conflicts during merge operations of .edmx files.

                              Steps to reproduce: (1) Generate EF data model based on an existing database (2) Add a couple of new columns, indexes, foreign…

                              6 votes
                              Vote
                              Sign in
                              Check!
                              (thinking…)
                              Reset
                              or sign in with
                              • facebook
                              • google
                                Password icon
                                I agree to the terms of service
                                Signed in as (Sign out)
                                You have left! (?) (thinking…)
                                0 comments  ·  tools  ·  Flag idea as inappropriate…  ·  Admin →
                              • 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;

                                6 votes
                                Vote
                                Sign in
                                Check!
                                (thinking…)
                                Reset
                                or sign in with
                                • facebook
                                • google
                                  Password icon
                                  I agree to the terms of service
                                  Signed in as (Sign out)
                                  You have left! (?) (thinking…)
                                  0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                                • Designer support for user-defined functions (UDFs, including scalar-valued functions)

                                  Scalar function is used usually some custom function to retrieve some only one value.
                                  eg.custom ID not Guid

                                  5 votes
                                  Vote
                                  Sign in
                                  Check!
                                  (thinking…)
                                  Reset
                                  or sign in with
                                  • facebook
                                  • google
                                    Password icon
                                    I agree to the terms of service
                                    Signed in as (Sign out)
                                    You have left! (?) (thinking…)
                                    1 comment  ·  tools  ·  Flag idea as inappropriate…  ·  Admin →
                                  • support for ordering in Include()

                                    using the include() with a 1 to many relationship, the data are loaded in the list without any specific order, forcing often to reload directly specifying the sort order

                                    5 votes
                                    Vote
                                    Sign in
                                    Check!
                                    (thinking…)
                                    Reset
                                    or sign in with
                                    • facebook
                                    • google
                                      Password icon
                                      I agree to the terms of service
                                      Signed in as (Sign out)
                                      You have left! (?) (thinking…)
                                      0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                                    • Built-in concurrency update and delete

                                      Built-in update and delete concurrencies by enable a standard rowrevision, combine with automatic scaffolding in mvc.

                                      5 votes
                                      Vote
                                      Sign in
                                      Check!
                                      (thinking…)
                                      Reset
                                      or sign in with
                                      • facebook
                                      • google
                                        Password icon
                                        I agree to the terms of service
                                        Signed in as (Sign out)
                                        You have left! (?) (thinking…)
                                        0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                                      • Interception Mechanism

                                        Allow specifying an interceptor (Castle, LinFu, Sprint.NET, etc) for modifying materialized entities. This allows injecting interfaces such as INotifyPropertyChanged, IEditableObject, etc.

                                        5 votes
                                        Vote
                                        Sign in
                                        Check!
                                        (thinking…)
                                        Reset
                                        or sign in with
                                        • facebook
                                        • google
                                          Password icon
                                          I agree to the terms of service
                                          Signed in as (Sign out)
                                          You have left! (?) (thinking…)
                                          1 comment  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                                        • Cascade Delete and Update Attribute

                                          It would be great to have attributes to indicate whether to cascade delete and updates rather than having to use the fluent api.

                                          5 votes
                                          Vote
                                          Sign in
                                          Check!
                                          (thinking…)
                                          Reset
                                          or sign in with
                                          • facebook
                                          • google
                                            Password icon
                                            I agree to the terms of service
                                            Signed in as (Sign out)
                                            You have left! (?) (thinking…)
                                            0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                                          1 2 8 10 12 16 17
                                          • Don't see your idea?

                                          Entity Framework Feature Suggestions

                                          Feedback and Knowledge Base