Entity Framework Feature Suggestions

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Entity Framework Feature Suggestions

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  1. Custom Accessors (Getters/Setters) in CodeFirst

    I should be able to put basic data validation on all of my public fields.

    10 votes
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      0 comments  ·  Flag idea as inappropriate…  ·  Admin →
    • Merge EDMX designer with Class Designer

      Visual Studio already contains Class Designer and UML Class Desinger. I don't need another so merge all them

      10 votes
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        2 comments  ·  tools  ·  Flag idea as inappropriate…  ·  Admin →
      • Support all mapping inheritance strategies

        Support all mapping inheritance strategies, well documented, as mentioned here: http://www.agiledata.org/essays/mappingObjects.html

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          0 comments  ·  tools  ·  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

          10 votes
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            2 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...

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                  0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                • Update database without seeding

                  It would be great to be able to do an "update-database" without having to execute the seeding commands as well. We are seeding quite a lot of meta data into our system, and it is a waste of time to wait for seeding each time we update/manipulate our model.

                  A flag in command prompt like

                  update-database -noseeding

                  would suffice.

                  10 votes
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                    0 comments  ·  runtime  ·  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 →
                      • Define RelatedProperty on an inherited foreign key

                        Allow mapping to entity in a derived class based on a property in base class.

                        Normally, we create a [RelatedTo] property for a foreign key defined in the same class.

                        But it would be quite handy to be able to define [RelatedTo] on a Foreign Key defined in the base class.

                        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 →
                          • Customize ModelObjectItemWizard to be able to add new items

                            I want to be able to customize Microsoft.Data.Entity.Design.VisualStudio.ModelWizard.ModelObjectItemWizard
                            So I can add my custom items to Microsoft.Data.Entity.Design.VisualStudio.ModelWizard.Gui.ModelBuilderWizardForm like I show on this updated screenshot
                            http://clip2net.com/clip/m407107/8fb72-entity-framework-wizard-customization2-35kb.png?nocache=1

                            In particular I want to add "ASP.NET Identity 2.0 EF Designer model" which will already contain all the entities required for ASP.NET Identity 2.0 to work.

                            9 votes
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                              0 comments  ·  tools  ·  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 →
                                • Support ignoring columns with database provided default value

                                  If a database defines a default for a column then the column does not need to be mapped to a conceptual schema property anymore. The column is optional (like nullable columns) and the model should validate even if no mapping for the column is defined.

                                  9 votes
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                                    1 comment  ·  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 →
                                    • 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 →
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