Entity Framework Feature Suggestions

Welcome! You can use this site to tell the Entity Framework Team what features you want to see in future versions of our products.

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  1. EF7 precise log messages please

    When I was experimenting with EF7 and mapped an identity column to a Int64 property, I got an exception. Unfortunately the exception did not told me:
    - which entity
    - which property
    had that mapping error...

    So really, instead of having 2 pages of stack trace, those 2 words would have been more useful... NHibernate does this, don't tell me that a new ORM (almost 1 and a half decade after the birth of NH) is not capable of doing at least the same as the old ORM...

    6 votes
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      0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
    • Throw exception when you attempt to access a navigation property that is not loaded

      Of course this should be an optional feature that can be enabled from the DbContext configuration. It only makes sense when Lazy Loading is disabled.

      This will be particularly useful for writing domain models that are independent of the data access technology and thus cannot use the EF functions to check whether a property is loaded.

      Currently, if the logic inside the domain model tries to access a navigation property that is not loaded, this will either fetch the data from the database if lazy loading is enabled (a lot of developers do not like lazy loading) or, if lazy…

      6 votes
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        1 comment  ·  Flag idea as inappropriate…  ·  Admin →
      • Add DbContext.Database.SqlQuery to Entity Framework Core

        I can't always get the best performance for extremely specific queries queries in Entity Framework. Sometimes it is best to just write very specific SQL (Currently working on a CTE recursive query that I wouldn't even know how to begin getting into EF without hitting the DB multiple times). Having SqlQuery<T> available give me complete freedom and allows me to use EF in the same way as Micro ORMS like Dapper to map a specific DTO when it makes sense. I don't wan't to have to map a custom object to my context and use the FromSql implementation off of…

        61 votes
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          6 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
        • Configure the string based search to be 'case sensitive' or 'case insensitive'

          Every time we need to search a string (contains/startswith etc), we need to write .ToLower() in each expression. But there should be a configuration property where we can define whether we want to search in case sensitive way or we want to ignore the case sensitivity.
          Thus we can avoid writing the same expression in whole application's data layer.

          1 vote
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            0 comments  ·  Flag idea as inappropriate…  ·  Admin →
          • On WcfDataService URI i can't update if the entity key field contains an slash. With Frmaework 4.6.1 and entity framework 6

            On WcfDataService URI i can't update if the entity key field contains an slash. With Frmaework 4.6.1 and entity framework 6

            1 vote
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              0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
            • Support C# 6 Expression-bodied function members in Linq-to-entities

              C# 6 added the feature to define class attributes in Lambda like syntax as "Expression-bodied functions" - it would be great if EF could take advantage of these when parsing the expression tree for a Linq-to-entities query.

              That way these attributes could be used in Linq-to-entities where statements and evaluated at the database level assuming they only used canonical functions.

              So:

              public class Post
              {
              public int PostId { get; set; }
              public string Title { get; set; }
              public string Content { get; set; }
              public string DisplayName => Title + " " + Content;

              }

              var query =…

              3 votes
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                0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
              • Query only columns that needed

                Now days speed and resource usage became crucial in application development. This in mind I would like to see a future in EF where you can query only the fields you need not the entire object(table). Similarly having ability to choose table columns at the design time for database first approach.

                1 vote
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                  1 comment  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                • Entities with same simple name but different namespaces

                  The type 'WebApplication8.Models.Tests.Person' and the type 'WebApplication8.Models.Person' both have the same simple name of 'Person' and so cannot be used in the same model. All types in a given model must have unique simple names. Use 'NotMappedAttribute' or call Ignore in the Code First fluent API to explicitly exclude a property or type from the model.

                  7 votes
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                    1 comment  ·  Flag idea as inappropriate…  ·  Admin →
                  • mapping to in-memory OLTP Tables

                    please add ability to create in-memory OLTP tables in next EF version

                    164 votes
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                      0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                    • addorupdate

                      It would be great if we can have the AddOrUpdate(...) and AddOrUpdateRange(...) Function in EF7.

                      Just set the expression inside the function or set index and EF check if the to be inserted file need to be added or inserted

                      3 votes
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                        0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                      • Support for POCO views using Entities

                        Currently i have a problem of showing a link between different entities - Say students, courses and lectures. Students have few of the attributes of courses, and lectures also have few overlapping attributes of courses (used via reference keys). To show these 3 entities together in a model / UI view, i will always have a compute a single model and bind it to UI. For each change in entities i have to update model (and vice versa). Instead if i get a new POCO view (assuming its supported by EF), i can always show latest data using the new…

                        3 votes
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                          0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                        • Ignore Duplicate Inserts

                          On the context simply allow a setting to ignore duplicate insertions. It should just add a not exist sub select query to ensure that a duplicate is not inserted on say a primary key or unique key...

                          This just removes a lot of admin on the insert side of things. If the data is already there why complain about about it unless you need to handle it.

                          This will be exceptionally useful on a many to many insert. If this is in place then I dont need to first check both sides of the insert to ensure that the data…

                          3 votes
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                            1 comment  ·  Flag idea as inappropriate…  ·  Admin →
                          • Ship symbols (pdb) for EntityFramework 6.X

                            How painful that I can't step into the EF souce code to debug an issue I'm seeing.

                            46 votes
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                              2 comments  ·  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.

                              7 votes
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                                0 comments  ·  tools  ·  Flag idea as inappropriate…  ·  Admin →
                              • Option in the Ado.net Entity Data Model template to output only the entities in a separate project and let .edmx reference new project

                                It would simplify N-Tier solutions with Entity Framework tremendously if the Data Access Layer (DAL) which gets the Entity Framework generated models could get the entities (i.e. Employee model), output to a separate project and let the DAL layer still function with the EF diagrams and other things by referencing the separately output project containing the entities. By doing this you will greatly simplify the UI layer needing to reference the entities when asking a Business Logic Layer to perform a service which may require an entity model. The way things are now, if you have a Business Logic Layer…

                                1 vote
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                                  1 comment  ·  Flag idea as inappropriate…  ·  Admin →
                                • Add support for Default Check Constraint

                                  Kindly provide the support for Default Check Constraint, so that we are not forced to supply values to NOT NULL columns that are having a DEFAULT constraint and are being handled in table design.
                                  Currently, work around is to supply some value even is the actual property is NULL

                                  4 votes
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                                    0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                                  • Option on Import from DataBase to choose how to resolve the conflicts on object names on differents schemas

                                    Add an option when using "update from DataBase" to choose how to resolve conflict name when two or more object have the same names but in diffrents schemas.
                                    Auto resolve -> add a number at the end of object name.
                                    Suffix or Prefix -> add the schema name to the objects names.

                                    1 vote
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                                      0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                                    • Migrations: Reset migrations function

                                      Currently, people are hacking a way around the issue of needing to Reset migrations: http://stackoverflow.com/questions/11679385/reset-entity-framework-migrations

                                      The current solution means deleting the migration folder and then deleting the migration history table in the DB, and then adding a brand new migration - but then having to comment out the code in the UP()... which works but isn't optimal for example to check db consistency or when having new developers onboard the team and just being able to run Update-Database on their machine.

                                      3 votes
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                                        0 comments  ·  tools  ·  Flag idea as inappropriate…  ·  Admin →
                                      • Specify which entity has the missing column

                                        It would speed development if the entity that has the missing column is provided to the user. Thanks

                                        0 votes
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                                          0 comments  ·  runtime  ·  Flag idea as inappropriate…  ·  Admin →
                                        • Support json linq queries

                                          As MS is adding json support to Sql Server 2016 it would be great if EF could support this with linq queries and convert a tree with arrays to nested lists.

                                          17 votes
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                                            1 comment  ·  Flag idea as inappropriate…  ·  Admin →
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