Entity Framework Core Feature Suggestions

Welcome! Use this web site to submit ideas and vote for what features you want to see in future versions of Entity Framework Core.

Our team will only fix bugs, implement small improvements and accept community contributions in the EF6 codebase. Larger feature work and innovation will happen only in the EF Core codebase. If you have ideas for improving EF6, we recommend you submit them on the EF6 GitHub site listed below.

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  1. 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
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      0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
    • ColumnAttribute to set the name of a navigation property backing onto a real column

      [Column("OwnerId")]
      public virtual User Owner { get; set; }
      some interest was expressed by the team on this so it may be in...

      5 votes
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        0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
      • Add support for Default Check Constraint

        Kindly provide the support for Default Check Constraint, so that we are not forced to supply values to NOT NULL columns that are having a DEFAULT constraint and are being handled in table design.
        Currently, work around is to supply some value even is the actual property is NULL

        4 votes
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          0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
        • Provide means to clear the database

          Provide a method on the Database class to remove all data from the database without knowing anything about the underlying physical database schema, relationships and constraints.

          This is critical in order to effectively test EF related code. While one way is to recreate the database every test, it has security and performance implications.

          4 votes
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            0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
          • Property to inform when entity is being materialized

            If you perform business logic in the entitys OnPropertyChanged event handler, eg. calculating some related properties or changing a state property when certain properties are changed, your code is also run when the entity is fetched from the database. This is not a real change of the entity, it is just being loaded. It would be nice if the EntityObject class had a property bool IsMaterializing that was true so you could break out of the OnPropertyChanged handler.

            4 votes
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              0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
            • EF factory similar to the ADO.NET provider factory to allow easy swapping between providers

              Provide an Entity Framework Factory similar to the ADO.Net Provider which allows easy swapping between different Entity Framework models such as SQL Server, Oracle, MySQL, DB2 etc. simply by providing the appropriate database provider information in a manner similar to the current ADO.Net Database Provider Factory.

              4 votes
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                0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
              • Improve conditionals on Table-per-Hierarchy

                It never works when your conditionals are based on a int column so where Type=1 etc. Only seems to work for when some column Is Null. It complains about mapping when you try and do this. Seems impossible to work around

                4 votes
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                  0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                • Method to get context from entity

                  some times we need to know the context from entity

                  4 votes
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                    1 comment  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                  • TPH should use Discriminator Expression

                    Allow via DataAnnotation or Fluent API which column in an abstract class is the Discriminator. For example, in a Vehicle table you could identity a VehicleType [int] as the discriminator.

                    Then in derived class (e.g., PassengerCar) you could identity what values (or set of values) distinguish the type in the table. For example, [DiscriminatorExpression("VehicleType in (1,4,7,10)")]

                    4 votes
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                      0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                    • Raise event right after EntityObject is materialized

                      When an EntityObject is materialized (i.e. after all its values are loaded from the database) an event should be raised.
                      I want to perform some setups and things each time the entity's data is set in its properties (including nav properties), there is no way to raise such an event, especially not with navigation properties where the AssociationChanged event is not raised at all for loading from db).
                      After the Constructor passes and the properties are all set with data from db, that event should be raise.
                      Should be something like EntityMaterialized or EntityLoaded etc.
                      In general I think the…

                      4 votes
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                        1 comment  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                      • Cascade Delete with Triggers

                        Using triggers for cascade delete/set allows for multiple cascades on the same table where the built-in sql server cascade does not

                        4 votes
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                          0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                        • Support for POCO views using Entities

                          Currently i have a problem of showing a link between different entities - Say students, courses and lectures. Students have few of the attributes of courses, and lectures also have few overlapping attributes of courses (used via reference keys). To show these 3 entities together in a model / UI view, i will always have a compute a single model and bind it to UI. For each change in entities i have to update model (and vice versa). Instead if i get a new POCO view (assuming its supported by EF), i can always show latest data using the new…

                          3 votes
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                            0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                          • Collation support

                            Currently strings are compared via default database collation or column collation when the comparison is translated to SQL. But they are compared to be binary equal when the code is executed in CLR.

                            So adding .ToList() before .Select() may suddenly change the result of comparison. And the tests with mocked IQueryables also work differently from the database translated queries.

                            Also it's sometimes required to compare strings using different collation. Currently that's only possible if you load the entire data into memory first and compare in CLR. However, even that case is troubling since there is no exact equivalent of SQL…

                            3 votes
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                              0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                            • Dynamic Mapping at runtime

                              support EF for dynamic mapping at runtime via a strait-forward API for creating a table and map it to model (for Code First). this is useful for Enterprise level application such as BPMS, Felixble CMS and ...

                              3 votes
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                                0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                              • AsNoProxy()

                                I would like to be able to query for a set of Entities and not have it return Proxies on a one off basis

                                3 votes
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                                  0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                                • Query from entity

                                  The Query method on the DbCollectionEntry and DbReferenceEntry classes provides access to the underlying query that the Entity Framework uses when loading related entities. A similar Query method should be added to DbEntityEntry.

                                  3 votes
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                                    0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                                  • Allow dependent Foreign Key properties to have a StoreGeneratedPattern of Computed

                                    Allowing dep. FK properties of the model to be generated by the database is useful for activity auditing (e.g. user logged into the DB gets their employee ID attached to the record by a trigger in insert/update).

                                    I understand the issues of having the DB generate the value (the value could violate the FK), but I put that on the same level as a DBA or other admin changing values that violate the FK (since the DBA or admin is likely doing the coding of the trigger itself).

                                    3 votes
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                                      0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                                    • Allow project-wide disabling of database generation (Database.SetInitializer( null ) for Entity Framework)

                                      As is commonly known, code first database generation is not for deployment:
                                      http://programmers.stackexchange.com/questions/76082/is-entity-framework-code-first-a-bit-meaningless-useless-in-production-and-what
                                      and to prevent the errors when changing the database and when going to production we should use:
                                      Database.SetInitializer<DbContext>( null )

                                      This is results in quite a lot of additional code and management when there are many different tables / dbsets and the project is going through change. There is also the risk that you might forget one. It is especially onerous when using generic classes derived from DbContext, such as

                                      public class Records<T,U> : DbContext
                                      where T : Employee
                                      where U : AccountInformation
                                      {
                                      public DbSet<T> Employees; …

                                      3 votes
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                                        0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                                      • Allow indexers in LINQ queries

                                        Let us access indexers in the LINQ queries... Why do I need to save named POSTed data to an intermediate variable before I use it once to query the database? It worked fine in LINQ 2 SQL, and I have been waiting for it to be fixed since EF4.

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