Entity Framework Feature Suggestions

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Entity Framework Feature Suggestions

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  1. 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 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 →
        • 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 →
              • Add Language Pack's or the possibility to create your own.

                At this moment there are no Language Pack's available for EF5. (found a link for version 4.1 but none higher)

                As a workaround I'm implementing custom Data Annotation's on the entities.

                It would be great if I could create my own language pack for Dutch.

                6 votes
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                  0 comments  ·  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 →
                  • 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 →
                        • Use names defined in linq query in generated sql

                          Currently if you have something like

                          select new { Year = c.DateEntered.Year }

                          the generated sql uses C1 for the column name. I would find it very useful if the used Year.

                          6 votes
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                            0 comments  ·  tools  ·  Flag idea as inappropriate…  ·  Admin →
                          • Support custom materialization of objects

                            Support custom materialization of objects

                            Currently, there is no way (at least that I can find) to support a custom means of materializing an object.

                            The primary use case for me currently, is that I would like to support *truly* immutable complex types in my domain model.

                            Currently I can only get 'immutability" by providing less accessible setters and a default constructor (which can be private).

                            I would like to be able to specify custom materialization, so that when entity framework loads a "Foo", I can tell it to use a specific, non-default constructor.

                            For example:

                            //Complex Value Object
                            class…

                            6 votes
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                              0 comments  ·  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 →
                                • For char/nchar and varchar/nvarchar columns use the actual column type and size in the parameter definition

                                  I can see that EF uses varchar(8000) for the parameter instead of the actual type (char(6) in a particular case). Would it be possible for EF to use the actual column type and size instead of varchar(8000) or nvarchar(4000)?

                                  6 votes
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                                    0 comments  ·  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;

                                    6 votes
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                                      0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                                    • Designer support for user-defined functions (UDFs, including scalar-valued functions)

                                      Scalar function is used usually some custom function to retrieve some only one value.
                                      eg.custom ID not Guid

                                      5 votes
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                                        1 comment  ·  tools  ·  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 →
                                        • Auto Create CRUD stored procedure

                                          EF should have the ability to automatically create basic CRUD stored procedures for every table. These basic CRUD stored procedures will only focus on a single table and all it's columns.

                                          An advanced feature would be the ability to auto generate CRUD stored procedures that take into account parent and child tables or many to many scenarios, etc.

                                          Other features would be to create stored procedures that allow for paging and streaming of large amounts of data. Say you have a web page that list contacts and you want ot show the 10th page. It would be ice to autogenerate…

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