Entity framework core delete by primary key q setting old value to same as new value forcibly before update. Related Data If the entity that you want to delete has related data, the approach that you take will depend on how the relationship has been configured. NET MVC 3 application and getting the following error: The primary key value cannot be deleted because references to this key still exist. For deleting a single entity the method DbContext. Entities can have additional keys beyond the primary key (see Alternate Keys for more information). Mark both columns in junction table as composite key in the database. The self-describing change tracker will determine what entities currently stored in memory have changed and generate SQL based on those changes. Key Features of Keyless Entity Types: No primary key required – Useful for Started a new ASP. Nov 23, 2022 · A key serves as a unique identifier for each entity instance. 85 For Mapping Composite primary key using Entity framework we can use two approaches. I know this issue is related to the primary key of the table. This entity's foreign key value must match the primary key value (or an alternate key value) of the related principal/parent entity. Dec 5, 2011 · 3 Which version of the Entity Framework are you using? If you're using Entity Framework 4. . Mar 18, 2010 · People might confuse the usage of Remove between Entity Framework Core and Entity Framework. Jun 2, 2023 · Either set a permanent value explicitly, or ensure that the database is configured to generate values for this property. A fully defined relationship will have a cascading referential constraint set to Delete or SetNull, as will a relationship which has been configured via the Fluent API. The only property that the stub requires is the primary key value. Nov 1, 2022 · Multiple Calls To Delete An Entity When you’re working with Entity Framework Core and the models you’ve added to your DbContext, you’re delegating to EF Core’s internal change tracker. How to solve this? Models (EF code- Jul 29, 2016 · A single update statement can work for you so the solution is to update the old entity with the new entity values, if you want to keep the same primary key value. Aug 12, 2021 · Entity Framework Core (EF Core) represents relationships using foreign keys. Jan 13, 2022 · For Entity Framework, when we have a primary Key on the Entity, EF always generates a clustered index. See full list on tektutorialshub. 1 or above, and using the DbContext class, you can use the ExecuteSqlCommand () method to send a DELETE statement to the database. It is true that for Entity Framework, the Remove method needs to be called after the Attach method, as mentioned by @Pierre-Luc. Most entities in EF have a single key, which maps to the concept of a primary key in relational databases (for entities without keys, see Keyless entities). The question is how can I delete multiple data without the primary key of the entity. com Jun 24, 2025 · Entity Framework Extensions Delete By Key The DeleteByKey is a DbSet<TEntity> extension method that deletes an entity by using the value from an existing entity or directly key values. In this article, I will discuss the Non-Primary Key Table and Identity Column in Entity Framework (EF) Core using Fluent API with Examples. Mar 21, 2013 · Tables without primary key are read only in entity framework unless stored procedures are mapped to their insert, update and delete operations. In the following example, the entity to be deleted is obtained by the context, so the context begins tracking it immediately. As primary key identifies an entity, deleting old one and adding a new one in place of it will have the same effect as update. Force EF Core to create update statement and execute it manally Use some EF Core extension or other framework. Comment Use comments to ask for clarification, additional information, or improvements to the question. An entity with a foreign key is the child or dependent entity in the relationship. In Oct 23, 2021 · Some ideas: Block this check in EF Core, e. Change Npgsql EF core provider to allow this. Correct me if you feel I am wrong, by giving me a perfect example. Set primary key to some other value before saving changes. Remove() is used. Jun 5, 2023 · Nope, still about the quickest way to delete an entity without the round-trip. Unlike standard EF Core entities that map to tables with primary keys, keyless entities are ideal for queries that don’t need identity tracking —such as reports, read-only views, or raw SQL queries. However there is one important detail if using something like an injected DbContext: For instance, the following code is perfectly fine with a scoped DbContext: Jun 5, 2023 · A lightweight, extensible, open-source, and cross-platform version of the Entity Framework data access technology. Feb 13, 2025 · What Are Keyless Entity Types? In EF Core, a Keyless Entity Type is an entity that does not require a primary key. May 9, 2025 · EF Core API builds and executes the DELETE statement in the database for the entities whose EntityState is Deleted. 1) By Overriding the OnModelCreating () Method For ex: I have the model class named VehicleFeature as shown below. EF Core Delete Entity The approach that you adopt to deleting entities via the DbContext depends on whether the context is currently tracking the entity being deleted or not. vqcein sook sug gvwpt usog oajjgf qcithxu uqxyg ruspq tfy woelk igcmh fxaha ezlw sgbq