Entity Framework Feature Suggestions

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Entity Framework Feature Suggestions

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  1. 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 →
    • 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 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 →
            • 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 →
                    • Update with Where Clause

                      We should be able to update with a where clause.

                      For example, you have an entity named "Product" that is bound to a "User". You want to be sure that the update is done on the product that you have your new values but also to the current user when the product is saved. Normally, in SQL we do a Update statement on Product table by setting new values to the product (where clause). What is missing is the ability to also add a AND statement to add the User Id. This way, we can be sure that the entity…

                      5 votes
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                        0 comments  ·  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 →
                          • Cascade Delete and Update Attribute

                            It would be great to have attributes to indicate whether to cascade delete and updates rather than having to use the fluent api.

                            5 votes
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                              0 comments  ·  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.

                              5 votes
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                                0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                              • User Definable Attribute on Entities and Navigation Properties

                                Can we have the ability to add user defined meta data to entities and properties so that we can pick up on these using T4 Templates. One such example is in the DataMemberAttribute, this takes a priority in the constructor it would be nice to be able to add this as a metadata value on a property, we need this so that we can use entities both in WCF and RIA Services, at the moment we have hijacked the summary field for this purpose.

                                5 votes
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                                  0 comments  ·  tools  ·  Flag idea as inappropriate…  ·  Admin →
                                • Add stored proceddures to data sources window

                                  Stored procedures can be included in an EDM. It would be most useful if a proc's result set were available for drag and drop from the Data Sources list such as tables currently are.

                                  5 votes
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                                    0 comments  ·  tools  ·  Flag idea as inappropriate…  ·  Admin →
                                  • Migrations: Allow Multiple Migration SQL Generator per Provider

                                    One way to allow community to contribute to EF Migrations is allow us to create more `MigrationOperation`s.

                                    For example, people can then add things like full text index, etc., things that are not in the core EF Migrations and are just boring SQL statements that need to be combined together.

                                    Currently, to build a provider agnostic `MigrationOperation`, you need to write the SQL generated for the operation in a class derived from `MigrationSqlGenerator`. If you want to add `CreateFullTextCatalog` operation and support SQL Server for example, you inherit `SqlServerMigrationSqlGenerator`, add a `Generate` method for your operation, and ensure all other…

                                    5 votes
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                                      0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                                    • Allow Include() and Projections to Co-Exist

                                      If you use a projection in the select part of a query, any eager loading of data through the use of Include() in the main query is ignored... as explained here http://social.msdn.microsoft.com/forums/en-US/adodotnetentityframework/thread/d700becd-fb4e-40cd-a334-9b129344edc9/

                                      This is short sighted. I like Include() because I can dynamically append them to a query, the work around of putting the data to be "Included" in the projection does not allow for this dynamic extension oof the query.

                                      If a developer has explicitly stated they wish to Include some related data they are doing it for a reason, so it should be respected.respected that they are doing…

                                      5 votes
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                                        0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                                      • Better support for modeling and regenerating existing database views

                                        The current database first support for views is not very good. I would like to see: readonly views where no key is assumed, updatable views where key can be selected, and at least an remembering of the actual create view syntax so that "generate database from view" will create a view and not a table. I often import a database view into my model and often do "generate database from model" to create a new empty database I can compare to production to make sure they are in sync. To do the latter, I have to delete all the sql…

                                        5 votes
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                                          0 comments  ·  tools  ·  Flag idea as inappropriate…  ·  Admin →
                                        • Intellisense for Entity Data Source expressions

                                          Provide Intellisense when typing in expressions for the Entity Data Source such as the Select, Where, OrderBy etc.

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