Entity Framework Feature Suggestions

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Entity Framework Feature Suggestions

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  1. Support for multiple result sets in .ExecuteFunction() and .ExecuteQuery()

    public Tuple‹T1, T2› ExecuteQuery‹T1, T2›(string query) { ... }
    public Tuple‹T1, T2, T3› ExecuteQuery‹T1, T2, T3›(string query) { ... }

    7 votes
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      1 comment  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
    • Support for Linked SQL Servers

      Add support for Linked servers.

      7 votes
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        1 comment  ·  Flag idea as inappropriate…  ·  Admin →
      • Generate separate POCO Entities

        When creating the edmx (Database First) within Visual Studio, there should be a checkbox to tell the code generators to create a separate library that contains the entities selected from the database. These can be used as domain objects/models across all layers in the application.

        Currently in EF5, you have to cobble together some hack to separate the POCO's - delete xml entries in the *.csproj and do other dangerous steps just for separation.

        EF6 should have the hooks for configuration by users within Visual Studio.

        That's the one thing NHibernate has over EF - separate POCO's

        Thanks!

        7 votes
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          0 comments  ·  tools  ·  Flag idea as inappropriate…  ·  Admin →
        • Visual Studio Database Project integration

          Support for updating a Visual Studio Database Project(s) instead of updating the db directly with an ad-hoc file.

          Currently 4.0 allows us to generate our database schema from the model but its capabilities are limited and destructive:
          unique keys – no support
          schema generation – destructive

          Database Projects for Visual Studio has already matured and more importantly has the capability of updating schemas without being destructive to the data. It would be nice to see the next designer integrate fully with this product rather than re-invent the wheel. For those of us that manage our databases using Database Projects this…

          7 votes
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            0 comments  ·  tools  ·  Flag idea as inappropriate…  ·  Admin →
          • Query serialization / deserialization

            ** SUGGESTION **
            Native support for query serialization and deserialization (to XML) decoupled from a concrete ObjectContext, including query parametrization and correct management of lambda expressions (e.g. using expression expansion as in LinqKit).

            ** WHY **
            We've developed a set of classes that allow a query to be written in the client layer and executed in the service layer via web services (with POCO entities). After the query is written normally using linq to entities and obtaining an IQueryable<T> object, this implementation transparently does the following:

            CLIENT side:
            - Expands the query expression tree to correctly manage lambda expressions.
            -…

            7 votes
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              0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
            • Allow foreign key columns to be shared between a subset of TPH subclasses

              Scenario in the post http://entityframework.codeplex.com/workitem/583 works only for columns that are not foreign keys.

              For example we have BaseEntity and three inherited entities:
              InheritedEntity1.Name
              InheritedEntity2.SpecialStatus
              InheritedEntity3.SpecialStatus

              SpecialStatus is entity stored in separate table.

              BaseEntity table will have columns 'Name', 'SpecialStatus_Id', 'SpecialStatus_Id1'

              Try to change the name of the column:
              modelBuilder.Entity<InheritedEntity2>().HasOptional(p => p.SpecialStatus).WithOptionalDependent().Map(i => i.MapKey("SpecialStatus_Id"))
              modelBuilder.Entity<InheritedEntity3>().HasOptional(p => p.SpecialStatus).WithOptionalDependent().Map(i => i.MapKey("SpecialStatus_Id"))

              and get an ModelValidationException:
              "One or more validation errors were detected during model generation:
              SpecialStatus_Id: Name: Each property name in a type must be unique. Property name 'SpecialStatus_Id' is already defined.
              "

              7 votes
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                0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
              • Add support for dynamically extended queries as per LinqKit

                LinqKit has shown that is possible to make the creation of queries much more dynamic, with them being composed at run time dependent on external conditions. nHibernate is good at this and LinqKit helps, but it would be nice to have an official solution.

                7 votes
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                  0 comments  ·  runtime  ·  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;

                  7 votes
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                    0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                  • 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 →
                      • 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 →
                                • 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 →
                                  • 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 →
                                    • 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
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                                        0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                                      • code first support for view

                                        allow to define a view by code first.

                                        actually we can map an entity to a view but it then becomes nasty to:
                                        - generate the database,
                                        - migrate the database
                                        - evolve the schema in general

                                        It should be possible to:
                                        - declare a DbSet that does not involve a table creation
                                        - declare a view, with a linq query for example, that allows view creation.

                                        For DbSet if should be a convention: if table name starts with vvv then it is a view, do not create a table

                                        For view creation... no idea actually.

                                        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 →
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