Entity Framework Feature Suggestions

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Entity Framework Feature Suggestions

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  1. 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 →
          • 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 →
                  • 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 →
                      • Weak references in the object context

                        Weak references would allow the context to cache objects but allow the caller can use a single context without wasting memory.

                        Example:
                        An embedded device where there is no clean unit of work. When something is loaded into the device it must process it, and when that something is done the user may remove it at some later point. It processes many somethings simultaneously, up to maximum capacity.

                        For now, we either use NoTracking objects or create a context for each object. This induces a lot of unnecessary overhead.

                        A weak reference would mean one context, no memory growth, but…

                        4 votes
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                          0 comments  ·  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 →
                            • [DefaultValue(...)] is not handled by Code First migration

                              In a column I can add [DefaultValue] attribute, but at the end it is ignored by the migration step. Confused. Please add support for this.

                              4 votes
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                                1 comment  ·  tools  ·  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 →
                                • Upgrade model to include FK

                                  I'd love a tool for upgrading the model from version 1 to version 4.

                                  4 votes
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                                    0 comments  ·  tools  ·  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 →
                                      • 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 →
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