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 FileStream and FileTable

    please add SQL Server 2012 features to new release of entity framework and code first that support filestream and filetable

    30 votes
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      1 comment  ·  Flag idea as inappropriate…  ·  Admin →
    • Use several Code First Data Contexts and several (different) Migrations in one database

      Say there is one database shared by several applications, objects are separated by schema. So it would be nice to be able to store and apply migrations for one schema independently from another one.

      29 votes
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        9 comments  ·  Flag idea as inappropriate…  ·  Admin →
      • Ability to plug-in custom conventions for schema generation

        EF CTP4 comes with a set of built-in conventions for model discovery and schema generation. We should be able to alter these conventions as opposed to re-mapping the entire class from scratch.

        Scenarios:
        1) I'd like to replace DataAnnotations with EntLib Validation Block and I should be able to tell EF to use my attributes.
        2) I want to apply a common convention like prefixing all tables with some string or even a more complicated scenario like all entities that derive from Inventory should generate tables with name: Inventory.<EntityName>.

        28 votes
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          2 comments  ·  Flag idea as inappropriate…  ·  Admin →
        • LINQ support for comparison of varbinary columns

          It is not currently possible to write a LINQ query that compares a value to data stored in a varbinary column. By comparison, I mean SQL-supported <, <=, >, >= comparisons that lexicographically compare the bytes in the column.

          As far as I know there is no way to write these queries without stepping down into Entity SQL.

          see http://social.msdn.microsoft.com/Forums/en-US/adodotnetentityframework/thread/f90dec50-acc7-4157-8927-acb246ec3572 for more.

          23 votes
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            0 comments  ·  Flag idea as inappropriate…  ·  Admin →
          • Make LINQ to Entities recognize GetValueOrDefault()

            I have a LINQ query that involves a nullable integer. When I try to run the query, I get the following error:

            "LINQ to Entities does not recognize the method 'Int32 GetValueOrDefault(Int32)' method, and this method cannot be translated into a store expression."

            I am not a L2E or EF guru in the least, but it seems like that should translate to the SQL ISNULL function shouldn't it?

            Regardless, can you please make this functionality work?

            21 votes
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              2 comments  ·  Flag idea as inappropriate…  ·  Admin →
            • Built-in entity auditing!

              EF should have some better data change tracking/auditing plumbing...on par with the extensive trace listener class support in ASP.NET. In order to create an audit history of the CRUD actions taking place within my entity model in EF 4.0, I had to write a lot of custom code and override the SavingChanges event and the OnContextCreated method to make it happen. Even now it doesn't properly catch all actions due to certain limitations (such as having DB-set identity fields). Think about how to make auditing data changes simpler and richer for devs!

              21 votes
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                4 comments  ·  Flag idea as inappropriate…  ·  Admin →
              • Client Side Profiler

                Create a client side profiler that will log running queries and statistics for the various data contexts. Also provide helpful tips to improve performance if applicable. Similar to what NHProf already does for NHibernate.

                21 votes
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                  2 comments  ·  Flag idea as inappropriate…  ·  Admin →
                • 21 votes
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                    2 comments  ·  Flag idea as inappropriate…  ·  Admin →
                  • Azure Active Directory Integrated/Password/Token

                    As an application,
                    I need to connect to an Azure SQL Server database using an AAD login/token from an EFCore application,
                    So that I can use .NET Core in a production environment.

                    As it is now, .NET Core is not ready for enterprise applications for companies that use Azure Active Directory (AAD). In order for Entity Framework Core to gain a larger audience it is imperative that it support all connectionstring options for Azure that it has supported for Integrated Security in on-premise instances.

                    Please make the time to implement this feature, it is important to the success of EFCore…

                    19 votes
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                      1 comment  ·  Flag idea as inappropriate…  ·  Admin →
                    • Synonym Support

                      The ability to create an entity for a synonym in the database.

                      19 votes
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                        3 comments  ·  Flag idea as inappropriate…  ·  Admin →
                      • Bulk Insert

                        ADO.Net supports bulk insert for big amount of data. With the help of this library
                        http://archive.msdn.microsoft.com/LinqEntityDataReader
                        It is possible to do Bulk inserts with entities. But it would be nice if there would be a integrated approach.

                        15 votes
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                          0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                        • Support for DateTime built-in operations in LINQ to Entities

                          Some customers want to write queries that include such expressions as "date1 - date2" or "datetime3 + timespan1 > datetime4". LINQ to Entities currently support some of date/time operations through the EntityFunctions.AddX and DiffX functions, but it doesn't support built-in operators with data/time types.

                          15 votes
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                            1 comment  ·  Flag idea as inappropriate…  ·  Admin →
                          • Support for MERGE (UPSERT) statement

                            I would like to see the T-SQL MERGE statement supported. For multi threading situations it really would be useful.

                            14 votes
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                              0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                            • Add row_number() support

                              Please add row_number() support. Need it in paging scenarios when we need to find a page to which entity belongs

                              13 votes
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                                1 comment  ·  Flag idea as inappropriate…  ·  Admin →
                              • Partial SaveChanges

                                Should be able to SaveChanges of certain entities while leaving the other entities in Added etc. mode, this is useful when you want to save data in a page that some other parts of the page contain invalid data that can't be saved.

                                13 votes
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                                  0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                                • Exclude function as opposed to Include

                                  There should be to each Linq to Entities query an extension "Exclude" that returns IEnumerable<TSource> and the excluded fields will not be selected from the store/source.

                                  12 votes
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                                    0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                                  • Update database without seeding

                                    It would be great to be able to do an "update-database" without having to execute the seeding commands as well. We are seeding quite a lot of meta data into our system, and it is a waste of time to wait for seeding each time we update/manipulate our model.

                                    A flag in command prompt like

                                    update-database -noseeding

                                    would suffice.

                                    11 votes
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                                      0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                                    • Support of multilingual entities

                                      Some applications require the ability to maintain data in different languages. In relational databases, a common implementation pattern to achieve this is to use a main table for the corresponding business entity with all persistent properties mapped to table fields, and a language (or localization) table for the language dependent properties of the same business entity. A single instance of a language dependent business entity is therefore represented as a single record in the main table, and multiple records in the language table, depending on the number of supported languages.

                                      It would be great when EF could support this pattern …

                                      11 votes
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                                        0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                                      • Built-in Advanced Cache Policies for queries and result sets

                                        Would you guys consider evolving the EF to have Built-in Advanced Cache Policies? For queries and result sets. Keep this data cached in memory, disk, or Azure: appfabric cache, blob storage - based on what you define.

                                        11 votes
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                                          0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                                        • Support for .Contains(Entity)

                                          Be able to write code like "if (Context.Table.Contains(entity))"

                                          11 votes
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                                            3 comments  ·  Flag idea as inappropriate…  ·  Admin →
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                                          Entity Framework Core Feature Suggestions

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