Entity framework include not working. EF7 fills contained navigation properties even when not requested. In EF Classic, the Include method no longer returns an IQueryable but instead an IncludeDbQuery that allows you to chain multiple related objects to the query result by using the AlsoInclude and ThenInclude methods. Finally it's a long time I've not been working with EF and Linq-to-entity, so I may not help you much. If the entity is not found in the context then a query will be sent to the database to find the entity there. These can be used to set predefined filter on entities that are to be included. EntityFrameworkCore then it works when running EF Core but not Entity Framework. When there is an entity in the projection to which the Include can be applied, it is applied. An easy and clean way to fix this is to use implicit includes over explicit ones. , calling the same include many times to access different entities on deeper levels. I have a specific issue where I'm unable to retrieve the expected results when using the Include method along with Contains in a Where clause. For example, I have the below entities. 0/3. My first question - be kind :-). Access Hi, Thanks in advance for the help. NET Core Web API I have a controller which simply should return a list of entities with optional (foreign key is nullable) referenced entities which can be filtered by one crit Entity Framework Core Plus Query IncludeFilter Description With Entity Framework, "Include" method is often used to load related entities / child collections. var blogArticles = context If something isn't working here with 3. 0, EF-core has global query filters. Deleted. I'm facing a problem when i try to do an Ef Core request with a filtered include and a select The request is well filtered without à select but when i had a select for transforming my entities to m When you fetch an entity in EF Core, its related data doesn’t magically appear unless you tell EF Core to include it. May 22, 2021 · I have managed to find the issue which was that the specific data class for this entity was using the Include () extension method from System. I will pass the example that occurred to me, so that you help me to understand what happened. This is the query: var titlesOwnedByUser = context. Include by no means a pointer to tell EF to perform a join. public class Employee { public int EmployeeId { get; set; } public string Name { SCENARIO If I split the Entity Framework linq query to evaluate an IQueryable first and after try to include some properties, the value of AccessGroupAccessPoints and AccessGroupAccessPoints. In this post, we'll explore a common problem—why the Include () method doesn't return the expected data—and provide a clear solution. Use Using Include method we can eagerly load the related entities in a single Query. It works fine if i do not join on tags bu I'm a little confused about a situation that occurred to me when using the include() method Entity Framework 6. But this was making the query so long and complicated, and thus unmaintainable. Learn how the Include method works and how you should use it. In this case, developers can think that Entity Framework will analyze the usage of the data they manipulate to optimize the query but it does not so if you ask Entity Framework Core to return some data you don't need, it will do it. Entity Framework Core Plus Query IncludeFilter Description With Entity Framework, "Include" method is often used to load related entities / child collections. We can start second Include to include that also in the result as shown below Note that Include always applied on the first entity in the query (i. Double checked if the property name is correctly passed. Topic in my code, I have to do it before marking existingUserTopic deleted. Just FYI, you don't need to include something to filter by it. NET Framework to . The not so simple rule is: projections don't always ignore Include. In general, if you're fetching data for display, it's a better idea to . 63 I am trying to work with Entity Framework Core 1. When using Entity Framework Core (v1. For instance this: var entities = In this article, we are going to show you how to use Filtered Include method in EF Core to filter results inside the include method. EntityFrameworkCore. The Include syntax can also be in string. I have the following code in my repository. For some reason, query. Using a context instance to add a child entity X (a post in this case), but later filtering the ch I need to query one object with its related objects, I am using the unit of work pattern and repository pattern. Include() method does not work and related entity isn't included in result. Entity Framework "Include" does not load entity related tables Asked 5 years, 5 months ago Modified 5 years, 5 months ago Viewed 3k times Tip Entity Framework Core will automatically fix-up navigation properties to any other entities that were previously loaded into the context instance. " query = query. Null is returned if the entity is not found in the context or in the database. I recently updated to asp. Permission . So even if you don't explicitly include the data for a navigation property, the property may still be populated if some or all of the related entities were previously loaded. Filters Entity Framework core work-around Since version 2. e. Here's the method I'm using in my repository: I recently updated to asp. " Include in Entity Framework Core is not working properly Asked 5 years, 3 months ago Modified 4 years, 6 months ago Viewed 223 times 0 I'm currently working on an ASP. Include then there is likely a better, simpler way of achieving what you are trying to do. load entities from multiple levels and multiple tables. Include() can slow your queries, what actually happens under the hood, and the modern, efficient alternatives you should be using instead. So to access existingUserTopic. Entity Framework appears to nullify navigation properties in memory as soon as an entity is marked as EntityState. The above works fine when using Entity Framework but the . Unlock the power of EF Core by using Include and ThenInclude to retrieve related entities. 0 and trying to utilize the . Personal website with detailed how to tutorials Include () not working when Select new object in Entity framework Asked 10 years, 4 months ago Modified 10 years, 4 months ago Viewed 1k times. Entity Framework Core will automatically fix-up navigation properties to any other entities that were previously loaded into the context instance. Since upgrading all my Linq queries using Include Method are failing, it is not translated properly to SQL. Include() extension method to return a collection of objects that have a child, where some of the children will be null. We have a table Projects with a C# model Project and a table Locations with a C# model Location. zip In a . NET Core application that uses Entity Framework Core to interact with a SQL Server database. 9 Our goal is to query a database, using Entity Framework Core and the . NET Core 7 using ASP. I think this is quite deliberate and here's why: The Find method on DbSet uses the primary key value to attempt to find an entity tracked by the context. In my experience, if you find yourself using . For instance this: var entities = Now, a simplistic suggestion for not ignoring Include is to say something like, "If an entity type in the final projection is also contained in some Include path, then use the remainder of that Include path. There is a similar library from the maker of AutoMapper: EntityFramework. May 30, 2023 · About the query statement not working, do you mean the navigation property is null (you can't get the related entities)? If that is the case, please check the database, whether it contains the related records. NET and EF Core. Consider the following entities: In this article, we are going to show you how to use Filtered Include method in EF Core to filter results inside the include method. If you're using some other SQLite provider, then it would be useful to know which one and why. 1. As I understand it, the include method works as LEFT JOIN when the enclosed object is NULL and as OUTER JOIN when the object has match. 0. Your database does not have foreign key constraint enforced, but you have reference navigation. Users . The Include is a Eager Loading function, that tells Entity Framework that you want it to include data from other tables. The following code is only returning me the main object, but not the related ones. net core 2. 1 Since upgrading from . Now, a simplistic suggestion for not ignoring Include is to say something like, "If an entity type in the final projection is also contained in some Include path, then use the remainder of that Include path. Include() and . Learn how the Include method allows you to load more data in the same query. Include(include). Using Include method we can eagerly load the related entities in a single Query. You should have a look at LinqPad, you can hook it up to your entity framework model and see what SQL is generated for your queries very easily, it's saved me so many times. In EF 6, both "schedule" and " It is due to a JSON Serialization issue, and there is two ways to fix it by Ignoring Reference Loop Handling, or JsonIgnore Attribute: Number 1: This was the fix to my issue, add this to Startup Include not working with join entities Asked 9 years, 3 months ago Modified 8 years, 10 months ago Viewed 7k times GASB Studies GAAP Utilization Summary and Working Paper Available The GASB staff has completed a study of GAAP utilization, including state financial reporting requirements and a statistical model of the determinants of GAAP choice. 0) with Linq and GroupBy clause I noted that the ThenInclude method does not properly receive the objects Steps to reproduce // NOT WORKING EXAMPLE var query = context. If final projection is not entity type whose navigations are eagerly loaded, Include will be ignored. Include() does not work when running EF Core (note the using System. I am facing an issue with the new Include filter on EF Core 5. Unlock the power of Entity Framework by including related entities in your LINQ query. AsNoTracking() methods. Entity); If the using statement is changed to using Microsoft. Select() into a DTO object rather than including everything. Learn how including related objects help to simplify your LINQ query. Where(u =&gt I have the following query of linq to entities. ThenInclude(thenInclude); I know I may not be explaining this perfectly as I'm not sure how to accomplish this and that's why I'm asking. I have 4 tables: Company, Employee, I'm developing a REST API application in . SelectTest. NET Core, I've encountered an unexpected behavior in Entity Framework Core related to the use of . Include when filling objects through the dbcontext. No problem. 0 @rowanmiller provided an excellent workaround for a string based include function which allowed me to do this in my c Include () not working when filtered with Contains () and aggregating to list #12852 Closed as not planned Bug olivierr91 I became aware of this method, i. In the code below, I am attempting to reference an "Include (d)" entity (Schedules) to obtain its Name property. RESOLVED - Problem was with LinqKit 1,1,7,3 For versions prior to EF CORE 1. Data. The EF metadata model will enforce a strong relationship. Sep 28, 2025 · In this article, we’ll break down why . The problem is that it doesn't seem to load the "Tags" relation even though i have included a thing for it. However, the method doesn't let you use LINQ queryable methods like Where to filter entities to include which is a major drawback. e Customer) Entity Framework Classic Include Description The Include method lets you add related entities to the query result. Explicit Includes give you precise control over which related data gets loaded, helping you: SQLite and Entity Framework Core: why include doesn't work? Asked 8 years, 3 months ago Modified 8 years, 2 months ago Viewed 2k times The idea in my answer is just simple enough to apply, when it's not working maybe it's not applicable. This may be a really elementry question but whats a nice way to include multiple children entities when writing a query that spans THREE levels (or more)? i. 1, then please file a new issue so we can investigate. Entity Framework 6 Include () not working Asked 7 years, 9 months ago Modified 7 years, 9 months ago Viewed 279 times Multiple Includes The Customer entity also related to Employee entity using the navigational property SupportRepId. Entity instead of Microsoft. Of course that doesn't offer the same flexibility as filtering Include on the fly. I have this query using Entity Framework Core (v2), but the Include/ThenInclude don't work as I expected. Tip Entity Framework Core will automatically fix-up navigation properties to any other entities that were previously loaded into the context instance. Include (p => p. In my database, I have a User entity and related Address entity with a one-to-one relationship, as well as Categories Include by no means a pointer to tell EF to perform a join. Unlock the power of Entity Framework by understanding when you should use the Include method. mmurq, otah, lpauu, xft0nh, ftsun, m31vli, l2lbk, gvijy, amvpwd, 4ry7v,