Entity Framework Feature Suggestions

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  1. Persistent caching of auto-compiled queries

    I know that EF code first automatically compiles queries and caches the results. But "Cold" queries are so slow.. Is possible to persist auto-compiled queries somewhere in the database so EF won't need to re-compile them again if that cache is lost (app restarted).

    6 votes
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      0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
    • namespace complex types

      Place complex types generated by the database in their own namespaces. Right now, when a stored procedure is imported, a complex type is generated and placed in no particular namespace, so all of the complex types are floating about.

      Perhaps instead, use the namespace that's been given to the model.

      6 votes
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        1 comment  ·  Flag idea as inappropriate…  ·  Admin →
      • Improve performance of adding many entities to DbContext (DetectChanges, AutoDetectChangesEnabled)

        The performance hit of adding (and possibly other operations) many entities to the context is so big, that you've introduced the AutoDetectChangesEnabled switch https://msdn.microsoft.com/en-gb/data/jj556205.aspx. This increases the code complexity and leads to nasty bugs. This is not ok and should be redesigned to work fast out-of-box. E.g. by upgrading from EF5 to EF6, due to this feature, the performance of some code has degraded by many orders of magnitude

        6 votes
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          0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
        • Native support for defining filtered unique and/or nonclustered indexes

          IndexAttribute does not allow me to definite filtered indexes. Instead, I have to execute raw SQL.

          6 votes
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            1 comment  ·  Flag idea as inappropriate…  ·  Admin →
          • Support lazy loading proxies on internal POCO classes

            I'd really like to not have all my model classes declared as public. Please support classes declared as internal. Even if there is a requirement to add InternalsVisibleTo("EntityFramework") or similar to the AssemblyInfo that is fine.

            6 votes
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              0 comments  ·  Flag idea as inappropriate…  ·  Admin →
            • Show diagram nodes under the EDMX node in solution explorer

              At the moment if I want to work on a specific diagram, I have to open the default diagram in the solution explorer, open the model browser, then open the diagram I'm interested in. Can we have diagrams listed as nodes underneath the EDMX nodes in solution explorer, allowing us to go straight to the diagram we are actually interested in?

              6 votes
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                1 comment  ·  tools  ·  Flag idea as inappropriate…  ·  Admin →
              • 6 votes
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                  1 comment  ·  Flag idea as inappropriate…  ·  Admin →
                • Add the ability to persist TimeSpan values (and others) as strings

                  The immediate need is to be able to map between TimeSpan values on the CLR side and their equivalent string representations on the database side.

                  Currently TimeSpan can only be mapped to the SQL time datatype, which does not make much sense since the time SQL type is meant for storing time-of-day while TimeSpan is meant to represent an arbitrary amount of time. Mapping between the two limits the TimeSpan to a 24 hours interval, which rarely makes sense.

                  In our current DAL we do this by persisting TimeSpan values as strings, calling TimeSpan.ToString() on the way down and TimeSpan.Parse()…

                  6 votes
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                    0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                  • Support optional complex type

                    For example: Class Foo has a property named Bar and that property is a reference to the complex type ComplexBar. It would be great if Bar could be left null in cases when a "user/whatever" does not have any ComplexBar information. The benefit is that ComplexBar can have required properties and other validation that only applies when the property Bar is not null. If it is null then that validation is not triggered because it does not apply. If I want Bar to always have a value then I can flag it as required, and it will behave like complex…

                    6 votes
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                      0 comments  ·  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
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                        0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                      • Change schema for dbContext pre connection

                        Build one model from code first and then use new TennantContext(connection, schema).

                        Exactly as HasDefaultSchema but possible to change with new connection.

                        No migrations and no other special features needed.

                        Lets say I have users data stored in one DB but in different schemas (each user has own schema). I have 1000+ of users, every model for every user is cached by IDbModelCacheKeyProvider is RAM kill.

                        P.S. Alter user set default schema is not a solution

                        Thanks

                        6 votes
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                          0 comments  ·  runtime  ·  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
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                            0 comments  ·  tools  ·  Flag idea as inappropriate…  ·  Admin →
                          • Custom identity generator support

                            I'd like to have a custom identity generator support which would allow more advanced ID generation like HiLo-generator (or even sequence based hi/lo ID gneration). This would (for example) help reducing the amount of database accessed/communication which should result in a speed up when adding a batch of new records through EF.

                            6 votes
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                              0 comments  ·  runtime  ·  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
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                                1 comment  ·  tools  ·  Flag idea as inappropriate…  ·  Admin →
                              • Make Data Annotations more flexible to use and to customize

                                DataAnnotations are only really useful when the rules and the error messages can buble the whole way up to the ui. Some modern ui frameworks already make use of this - e.g. Breeze. But DataAnnotations are just not as flexible as we need them. Some known problems are:

                                - you can define your own error messages within the DataAnotation - but those are not easy to localize. To my mind the decission about displaying the content error message should be left to the client. As the client could possibly be a web page, a smartphone or even a coffee machine…

                                6 votes
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                                  1 comment  ·  Flag idea as inappropriate…  ·  Admin →
                                • Create method should initializer collection navigation properties

                                  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
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                                    5 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                                  • Optional Convention that assigns Default Value to not nullable types

                                    When using code first with an existing database, the "can not assign null to a non nullable type" exception can be realy painfull, because the compiler gives no warning, when i project a int? to a int.

                                    It would be very usefull to have a Convention / Configuration that enables the automatic use of GetValueOrDefault for these cases.

                                    6 votes
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                                      0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                                    • Support for generic complex types

                                      You should support for using generic complex types. Consider scenerio where I would like to create Rage<T> type. Now I must create RangeOfInt32, RangeOfInt64, RangeOfDecimal, etc. It will be also great if that class could be defined outside of the model.

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