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 →
    • 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.

      7 votes
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        0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
      • support tables with the same name but diffrent schema

        assume we have a table named Transaction with a schema GL and another one named Transaction but belongs to AR schema,
        until now , could not be mapped in code-first

        7 votes
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          0 comments  ·  runtime  ·  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 →
          • 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 →
            • System.Data.Entity.DbSet<TEntity>.Create() method overload for taking n parameters

              The idea would be to overload Create() method on DbSet so as to take any parameters, resolving to the constructor tha best fits, like so

              public TEntity Create(params object[] args);

              (I understand the generated proxy for change tracking and nivigational properties support should honor all constructors defined on the TEntity type)

              This would allow for a much cleaner (and layarable) DomainModel. Entities may now be created from required values and the need to set those values (i.e. the need for public setters) after the creation dissapears.

              7 votes
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                0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
              • 6 votes
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                  0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                • Bulk Object Graph Persistence

                  I would like to see the ability to persist an entire object graph in one DB call. Currently it is way to chatty with the DB which makes it really slow to persist.

                  6 votes
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                    3 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                  • Allow adding fluent code to each entity, to minimize the mess in the context

                    There should be a way (perhaps by implementing an interface), to add fluent code separately to each entity instead of adding it all in the OnModelCreating method.
                    The OnModelCreating base method should call all the entities that implement that interface and call OnModelCreating(context) of it.
                    In this way the bunch of fluent code in the main context, especially if it's a large one, would tidy up in the individual entities.
                    Of course, this is already simply doable, but I think this should go out the box.

                    6 votes
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                      1 comment  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                    • Use CTE (with clause) instead of derived tables in generated queries.

                      SQL Generated code would be much more readeable if you would use common table expressions instead of derived table. Just choose the name you want for the CTE and move the code generated for the derived table into the CTE, and replace the derived table expression by the name of the CTE. The resulting code is then no more indented. You can also take the opportunity to properly name the CTE to give an hint about which part of the linq expression result in the CTE generation. This improvement should not be complex to implement, and would help us and…

                      6 votes
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                        0 comments  ·  runtime  ·  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 →
                        • 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

                          6 votes
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                            0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                          • 6 votes
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                              1 comment  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                            • Instantiate "many" nav properties with empty list

                              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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                                4 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                              • 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 →
                                • Built-in concurrency update and delete

                                  Built-in update and delete concurrencies by enable a standard rowrevision, combine with automatic scaffolding in mvc.

                                  5 votes
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                                    0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                                  • Interception Mechanism

                                    Allow specifying an interceptor (Castle, LinFu, Sprint.NET, etc) for modifying materialized entities. This allows injecting interfaces such as INotifyPropertyChanged, IEditableObject, etc.

                                    5 votes
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                                      1 comment  ·  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 →
                                      • 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 →
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