Entity Framework Feature Suggestions

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How can we improve Entity Framework or Entity Framework Core?

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  1. 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 →
      • The "dnx . ef migration add initial" command of ASP.NET 5/EF 7 should generate columns in the right order

        The "dnx . ef migration add initial" command of ASP.NET 5/EF 7 should generate columns in same order as the properties appear in the entities.
        Currently they are in alphabetical order.

        5 votes
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          0 comments  ·  tools  ·  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 →
          • Support more validation rules

            Besides data annotations also make it possible to define custom annotations, inter entity rules, security and inter record rules and more. For example: http://www.softfluent.com/images/cfe-screens/07-cfe_addrule.png

            5 votes
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              0 comments  ·  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 →
              • 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 →
                • 4 votes
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                    1 comment  ·  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 →
                    • EF ODBC Support

                      I have seen NHibernate have the capability to connect ODBC data source. I could not do that in EF now. I want to connect Informix through EF with ODBC Driver. I did not want to use Informix data provider for this type of setup.

                      4 votes
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                        0 comments  ·  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 →
                        • Complex (struct) key properties for tables with multiple primary keys. Enabling easier search by key

                          Some tables have more than one field included in primary key.

                          This makes definition of generic methods that search by key hard to implement.

                          If it would be possible to combine all database keys into one struct in model, and enable T4 templates to recognize which property is the key, template-generated repository could be much more powerful.

                          4 votes
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                            0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                          • Provide an Entity Framework Factory similar to the ADO.Net Provider which allows easy swapping betwe

                            Provide an Entity Framework Factory similar to the ADO.Net Provider which allows easy swapping between different Entity Framework models such as SQL Server, Oracle, MySQL, DB2 etc. simply by providing the appropriate database provider information in a manner similar to the current ADO.Net Database Provider Factory.

                            4 votes
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                              0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                            • Add attribute for federated tables

                              Add a "FederatedOn" attribute to the "Table" data annotation so Code First entities can be associated to a SQL Azure Federations federated member. For instance: [Table("Pessoas", FederatedOn = "TenantId=TenantId")]
                              As an alternative, allow an equivalent attribute to be declared on the entity property that is the federation distribution key (e.g. the TenantId property).

                              4 votes
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                                0 comments  ·  tools  ·  Flag idea as inappropriate…  ·  Admin →
                              • Add option to update model from database project

                                It would be great to update the EDMX from a database project. Currently we are working with an database project containing the tables, indexes, stored procedures, types etc... If we are able to update the EDMX directly from the database project, it would remove an extra step to connect with a database. In this way, we don't even need a hosted SQL server to update the EDMX.

                                4 votes
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                                  0 comments  ·  tools  ·  Flag idea as inappropriate…  ·  Admin →
                                • Eager Loading With Filters

                                  We should be able to specify what we want to include inside the include statement. This way, if we have a lot of information, we will not have a performance hit.

                                  For example:

                                  var blogs1 = context.Blogs
                                  .Include(b => b.Posts)
                                  .ToList();

                                  This is fine, but imagine you have a LOT of posts. If you want to have only Posts from today, why not having something to filter it down directly from the SQL.
                                  var blogs1 = context.Blogs
                                  .Include(b => b.Posts, d=>d.Date>=DateTime.Now)
                                  .ToList();

                                  4 votes
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                                    0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                                  • Improve conditionals on Table-per-Hierarchy

                                    It never works when your conditionals are based on a int column so where Type=1 etc. Only seems to work for when some column Is Null. It complains about mapping when you try and do this. Seems impossible to work around

                                    4 votes
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                                      0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                                    • Code First (EF6) Ignore certain properties so they aren't mapped to stored procedures

                                      When mapping Properties to Stored Procedure parameters it is not possible to ignore any properties that the Stored Procedure doesn't require/isn't expecting e.g. a field that the DBMS populates. In the example below the DateCreated property is defaulted in the DBMS to the current date/time so isn't required as a parameter, but is to be shown on the blog post UI so needs to be part of the model. Ideal would be to have an IgnoreParameter option

                                      public class Blog
                                      {
                                      public int BlogId { get; set; }
                                      public string Name { get; set; }
                                      public string Url { get;…

                                      4 votes
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                                        1 comment  ·  Flag idea as inappropriate…  ·  Admin →
                                      • Add Entity Framework Releases to Microsoft Reference Source Server

                                        Make it quick and easy to see the source code during debugging and allowing Visual Studio to load the source on demand as it does for the core .net framework.

                                        4 votes
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                                          0 comments  ·  tools  ·  Flag idea as inappropriate…  ·  Admin →
                                        • Designer support for specifying Interfaces for Entities

                                          I have an interface that a lot of my entities support.

                                          interface Audit
                                          {
                                          DateTime CreatedAt,
                                          int CreatedBy,
                                          DateTime ModifiedAt
                                          int ModifiedBy
                                          }

                                          It would be nice to be able to mark Entities as supporting this interface in the designer.

                                          See also http://stackoverflow.com/questions/4093897/interface-inheritance-in-entity-framework

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