Entity Framework Feature Suggestions

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Entity Framework Feature Suggestions

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  1. 10 votes
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      0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
    • Better auditing interception

      Together will all the fabulous features you are introducing I think it could be find room also for a sort of Audit System more business oriented.
      We love the new Log & Interceptor hooks but we also need to pull out of the DbContext an easy POCO object based on 3 level of entities like this:

      (S)avedChangset (1 instance for every SaveChanges() call with at least Time, User, Application & Session Info)
      (E)ntities (a collection of the Entities changed within the same "Saved Changset" with at least TableName & PK)
      (A)ttributes (a collection of Attributes changed within the same "Entity",…

      10 votes
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        0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
      • Generate the Association objects based on the Foriegn Key Column Name

        Generate the Association objects in a model based on the Foriegn Key Column Name rather than "Association1", "Association2" etc

        10 votes
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          2 comments  ·  Flag idea as inappropriate…  ·  Admin →
        • Ability To Create Read-Only Entities

          There are times I want to show data like a report where I don't need all the required fields from the DB because I will NEVER write the data back. It would be nice to be able to create an entity, limit which CRUD operations it supports, and allow some required fields to not be present in the entity if I don't support CREATE or UPDATE...

          10 votes
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            0 comments  ·  Flag idea as inappropriate…  ·  Admin →
          • Code First better attributes

            * Decimal Scale/Precision
            [Column(DecimalScale=18, DecimalPrecision=2)]

            * Nullable indication (For string is essential):
            [Column(NotNull = true)]

            * All in one:
            [Column("TestName", NotNull = false, MaxLength = 250, MinLength = 3, Default = ""])
            public String Name { get; set; }

            [Column(NotNull = true, MaxLength = 0, Default = 0])
            public int Count { get; set; }

            10 votes
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              1 comment  ·  Flag idea as inappropriate…  ·  Admin →
            • System.Data.Entity.DbSet<TEntity>.Create() method overload for taking n parameters

              The idea would be to overload Create() method on DbSet so as to take any parameters, resolving to the constructor tha best fits, like so

              public TEntity Create(params object[] args);

              (I understand the generated proxy for change tracking and nivigational properties support should honor all constructors defined on the TEntity type)

              This would allow for a much cleaner (and layarable) DomainModel. Entities may now be created from required values and the need to set those values (i.e. the need for public setters) after the creation dissapears.

              10 votes
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                0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
              • Option to use Inner Join SQL when Eager Loading (AKA IncludeRequired method)

                When trying to load related entities using the "Include" eager loading feature of EF, it always generates SQL that uses an LEFT OUTER JOIN e.g.

                from m in Customer.Includes("Orders")

                will always generate the SQL:

                SELECT ......
                FROM Customers
                LEFT OUTER JOIN Orders....

                This is not always desirable, especially when you only want to retrieve Customers that have at least one or more related Orders. By forcing the generated SQL to always use LEFT OUTER JOIN, it's going to load all Customers regardless of whether they have related Orders or not. This can become extremely inefficient, especially when there are lots…

                9 votes
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                  1 comment  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                • 9 votes
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                    0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                  • 9 votes
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                      0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                    • Entity Designer: custom metadata editor

                      I would like to add my custom metadata using Entity Designer and then use it within T4 templates. To achive it with current version I must write my own extension for Visual Studio - it is not convenient.

                      9 votes
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                        1 comment  ·  Flag idea as inappropriate…  ·  Admin →
                      • Use multiple result sets to handle Include statements

                        Currently, EF uses a flat query in order to populate navigation property values when using eager loading via the Include statement. While this is acceptable in some (perhaps many) cases, there are a lot of cases where this produces unacceptable queries, whether from a size or performance perspective.

                        While this performance bottleneck can be partially avoided by using LoadProperty, this is

                        a) less expressive and more verbose
                        b) potentially more expensive, as it requires a round-trip for every property on every entity

                        Instead, please allow us the option of having EF generate multiple SELECT statements to address each navigation property

                        9 votes
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                          2 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                        • Add polymorphic associations support

                          Add support for polymorphic associations like <any> and <many-to-any> in NHibernate.

                          9 votes
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                            0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                          • Clear, Complete, and Accurate Documentation

                            Break the mold! Provide clear concise documentation that describes the API, the intended use for each API, the purpose and use (with examples of the arguments to each method), and explanatory samples and snippets that are both complete and clearly show the intened information.

                            9 votes
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                              0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                            • Mapping n to n relation in a table with discriminator like TPH

                              The most interesting side effect of TPH is that the DB need less tables and the overview is much better. Another interesting way to reduce the number of tables in a DB is to map the n to n relations in one table with a discriminator like the TPH.
                              The xsd schema allow already to add a condition to the associated set mapping (n to n) but it's not supported from EF.
                              This forum topic describe the problem and how it could be solved.
                              http://social.msdn.microsoft.com/Forums/en-US/adodotnetentityframework/thread/7144757d-c124-4932-b2bf-d0ab845597fd

                              9 votes
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                                0 comments  ·  tools  ·  Flag idea as inappropriate…  ·  Admin →
                              • Allow only some CUD operations to map to stored procedures

                                At present, mapping stored procedures is an all or nothing proposition. Either you map each of the Insert, Update and Delete procedures or none at all. It would be great to utilize the generated functionality as is but still have the option to override just one of the three.

                                9 votes
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                                  0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                                • EdmGen.exe should support generating an edmx file from a connection string

                                  EdmGen.exe should support generating an edmx file from a connection string.

                                  In .net 3.5, EdmGen2.exe (http://archive.msdn.microsoft.com/EdmGen2) was able to generate an edmx file from a connection string.

                                  But for (EF) .net 4.0, we have lost this ability.

                                  Thank you.

                                  9 votes
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                                    1 comment  ·  tools  ·  Flag idea as inappropriate…  ·  Admin →
                                  • Update model from database should update complex types returned by stored procedures

                                    When using option 'Update model from databes' VS should update complex types returned by SP - now every SP have to be updated manually

                                    9 votes
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                                      1 comment  ·  tools  ·  Flag idea as inappropriate…  ·  Admin →
                                    • Support for generic complex types

                                      You should support for using generic complex types. Consider scenerio where I would like to create Rage<T> type. Now I must create RangeOfInt32, RangeOfInt64, RangeOfDecimal, etc. It will be also great if that class could be defined outside of the model.

                                      9 votes
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                                        0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                                      • Allow "normally"/correctly formatted connection strings

                                        Connection string sections now needs two connection strings: one for EF to use, and one for all other standard .Net Framework APIs utilising the same database.

                                        This is kinda bizarre, violating DRY, KISS etc.

                                        The requested change:
                                        Have a config section for EF.
                                        Have all non-standard connection string settings set here.
                                        Have it reference the regular connection string section to get the standard settings for the database.
                                        Combine the settings within the framework in order to make a connection.

                                        Simple, no?

                                        8 votes
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                                          3 comments  ·  Flag idea as inappropriate…  ·  Admin →
                                        • Support Pessimistic Concurrency

                                          Allow a Select with UpdLock which locks all returned entities in the Database. This is a basic requirement to program for example a ticket sales portal with entity framework! So far it's not possible and I still have to stick to NHibernate :(

                                          8 votes
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                                            0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
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