Entity Framework Feature Suggestions

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Entity Framework Feature Suggestions

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  1. Make it easier to map MEST scenario's between the entities and the poco's

    Summary:
    It's rather confusing and complex trying to map entities (the table/view representations that were added to the EF Designer) to a single POCO.

    Details:
    Currently, if we wish to have a MEST scenario, we need to manually code this mapping in various places. Now, manually coding is not really a big deal .. it's just that there's a number of quirks and tricks that make this process frustrating and a bit confusing.

    It would be extremly appreciated (and more productive) if the mapping of these Entites on the designer, to their POCO, could be done visually IN the designer,…

    31 votes
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      1 comment  ·  Flag idea as inappropriate…  ·  Admin →
    • Synonym Support

      The ability to create an entity for a synonym in the database.

      31 votes
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        3 comments  ·  tools  ·  Flag idea as inappropriate…  ·  Admin →
      • Having a real designer...

        It should be great to have a designer which supports all mapping (so which allow us to realize TPC, Horizontal Entity Splitting).
        It should be great to have a designer that supports partial model views as I did (http://msmvps.com/blogs/matthieu/archive/2009/04/07/edm-designer-new-version.aspx, http://msmvps.com/blogs/matthieu/archive/2009/04/11/edm-designer-new-feature.aspx)
        It should be great to be able to see complex types on the designer and not only on Model Browser window as I did (http://msmvps.com/blogs/matthieu/archive/2009/01/07/edm-designer.aspx).
        It should be great to not lose all our ssdl changes when we update the model from db.

        31 votes
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          0 comments  ·  tools  ·  Flag idea as inappropriate…  ·  Admin →
        • Bulk Insert

          ADO.Net supports bulk insert for big amount of data. With the help of this library
          http://archive.msdn.microsoft.com/LinqEntityDataReader
          It is possible to do Bulk inserts with entities. But it would be nice if there would be a integrated approach.

          30 votes
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            0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
          • LINQ support for comparison of varbinary columns

            It is not currently possible to write a LINQ query that compares a value to data stored in a varbinary column. By comparison, I mean SQL-supported <, <=, >, >= comparisons that lexicographically compare the bytes in the column.

            As far as I know there is no way to write these queries without stepping down into Entity SQL.

            see http://social.msdn.microsoft.com/Forums/en-US/adodotnetentityframework/thread/f90dec50-acc7-4157-8927-acb246ec3572 for more.

            30 votes
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              0 comments  ·  Flag idea as inappropriate…  ·  Admin →
            • Support IEnumerable<T>

              Sometimes we wish to expose a collection as read only, normally using IEnumerable<T> instead of ICollection<T>. This is not recognized in the current version, but it should.

              29 votes
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                2 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.

                29 votes
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                  0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                • Delete Collections

                  I think there would be nice idea if you give method to delete collection. Without using foreach statement.

                  Now:
                  foreach(var item in collection)
                  {
                  db.Customers.Remove(item);
                  }
                  db.SaveChanges();

                  and should be simply

                  db.Delete(collection);
                  db.SaveChanges();

                  28 votes
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                    2 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                  • Support for DateTime built-in operations in LINQ to Entities

                    Some customers want to write queries that include such expressions as "date1 - date2" or "datetime3 + timespan1 > datetime4". LINQ to Entities currently support some of date/time operations through the EntityFunctions.AddX and DiffX functions, but it doesn't support built-in operators with data/time types.

                    28 votes
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                      0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                    • Add row_number() support

                      Please add row_number() support. Need it in paging scenarios when we need to find a page to which entity belongs

                      28 votes
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                        1 comment  ·  Flag idea as inappropriate…  ·  Admin →
                      • Make EF IoC Friendly

                        Make EF IoC friendly. It would be nice to have extensions to setup IoC w/ EF.

                        27 votes
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                          3 comments  ·  Flag idea as inappropriate…  ·  Admin →
                        • Built-in Advanced Cache Policies for queries and result sets

                          Would you guys consider evolving the EF to have Built-in Advanced Cache Policies? For queries and result sets. Keep this data cached in memory, disk, or Azure: appfabric cache, blob storage - based on what you define.

                          26 votes
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                            0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                          • Support for OPTION (RECOMPILE) on generated queries

                            There are many scenarios where parameter sniffing in SQL server creates serious performance problems. This is very problematic with many EF generated queries, since there is no control that allows you to tell the database optimizer not to use the parameter values or cache a plan. A simple mechanism to hint OPTION (RECOMPILE) on the generated queries would solve most of these issues.

                            A more sophisticated solution that would allow the generated sql to leverage (Optimize for Unknown) would also be useful.

                            Parameter sniffing and the related performance problems are a very prevalent issue with SQL server and if you…

                            26 votes
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                              0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                            • Exclude function as opposed to Include

                              There should be to each Linq to Entities query an extension "Exclude" that returns IEnumerable<TSource> and the excluded fields will not be selected from the store/source.

                              26 votes
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                                0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                              • Make LINQ to Entities recognize GetValueOrDefault()

                                I have a LINQ query that involves a nullable integer. When I try to run the query, I get the following error:

                                "LINQ to Entities does not recognize the method 'Int32 GetValueOrDefault(Int32)' method, and this method cannot be translated into a store expression."

                                I am not a L2E or EF guru in the least, but it seems like that should translate to the SQL ISNULL function shouldn't it?

                                Regardless, can you please make this functionality work?

                                24 votes
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                                  2 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                                • Converting UpperCase to PascalCase

                                  It would be great if you could add feature for designer to convert uppercase table names to pascal case

                                  23 votes
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                                    0 comments  ·  tools  ·  Flag idea as inappropriate…  ·  Admin →
                                  • Improve Entity Framework to utilize Dependency Injection for entity materialization

                                    I would like to see EF upgraded to allow a user-selectable Dependency Injection container to manage materialization of entities. This would allow finer grained control over how objects are materialized, as well as support interface based definitions for entities.

                                    23 votes
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                                      0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                                    • Support of multilingual entities

                                      Some applications require the ability to maintain data in different languages. In relational databases, a common implementation pattern to achieve this is to use a main table for the corresponding business entity with all persistent properties mapped to table fields, and a language (or localization) table for the language dependent properties of the same business entity. A single instance of a language dependent business entity is therefore represented as a single record in the main table, and multiple records in the language table, depending on the number of supported languages.

                                      It would be great when EF could support this pattern …

                                      22 votes
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                                        0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                                      • Test suite for EF provider compliance

                                        There should be a standard EF Test Suite. As the test suite ideally could run against any of the databases, it would ease out the work required to see compliance against different Databases

                                        22 votes
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                                          2 comments  ·  tools  ·  Flag idea as inappropriate…  ·  Admin →

                                          UPDATE: Reverting status from “under review” to “no status” since we aren’t currently working on this. We will still consider it for future releases.

                                          Updating the title to reflect what I believe is the original intent of JK.

                                        • 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;

                                          22 votes
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                                            0 comments  ·  Flag idea as inappropriate…  ·  Admin →
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