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. Make it easier to map MEST scenario's between the entities and the poco's

    Summary:
    It's rather confusing and complex trying to map entities (the table/view representations that were added to the EF Designer) to a single POCO.

    Details:
    Currently, if we wish to have a MEST scenario, we need to manually code this mapping in various places. Now, manually coding is not really a big deal .. it's just that there's a number of quirks and tricks that make this process frustrating and a bit confusing.

    It would be extremly appreciated (and more productive) if the mapping of these Entites on the designer, to their POCO, could be done visually IN the designer,…

    31 votes
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      1 comment  ·  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 …

      28 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

        28 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.

          26 votes
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            0 comments  ·  runtime  ·  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.

            26 votes
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              0 comments  ·  runtime  ·  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.

              26 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.

                25 votes
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                  0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                • Allow utilizing Dependency Injection for entity materialization

                  I would like to see EF upgraded to allow a user-selectable Dependency Injection container to manage materialization of entities. This would allow finer grained control over how objects are materialized, as well as support interface based definitions for entities.

                  23 votes
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                    0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                  • Updating the F# SqlEntityConnection Type Provider

                    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.

                    22 votes
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                      1 comment  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                    • More information 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

                      22 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

                        21 votes
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                          1 comment  ·  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.

                          21 votes
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                            0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                          • Support JSON LINQ queries

                            As MS is adding json support to Sql Server 2016 it would be great if EF could support this with linq queries and convert a tree with arrays to nested lists.

                            20 votes
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                              2 comments  ·  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

                              20 votes
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                                1 comment  ·  runtime  ·  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.\

                                19 votes
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                                  0 comments  ·  tools  ·  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 →
                                        • 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 →
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