Entity framework get by list of ids
WebFeb 14, 2016 · Viewed 14k times. 10. I need to delete multiple Ids from a List of Ids. public IHttpActionResult Delete (List IDs) { DealBazarEntities.Restaurants.RemoveRange (IDs); DealBazarEntities.SaveChanges (); } But RemoveRange does not allow multiple ids , it expect only List. Yes, I know that , if I send list of entities to server ... WebFeb 6, 2014 · The IQueryable.ToQueryString method introduced in Entity Framework Core 5.0 may help with this scenario, if you are willing to have some raw SQL appearing in your code. This method will generate SQL that can be included in a raw SQL query to perform a bulk update of records identified by that query. For example:
Entity framework get by list of ids
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WebJul 3, 2013 · The solution is to use long and make use of the autogenerate id options of the entity framework. Alternatively a more general case for non primary keys that could be null would be to use the contains option with the value or default operator. users.Where(user=>ids.Contains(user.id??0)); WebApr 10, 2011 · If that's the case i would suggest a solution where you're passing the current user id to the database and fetch the roles assigned with a INNER JOIN. Depending on …
Web2 days ago · As mentioned, the IDs are only generated once the SaveChanges() is called. Fortunately, EF will populate the IDs in the entity object references when they are inserted, so the solution is to keep the entity references and get the IDs after saving. If you are recording the original list item's ID as part of the new entity this is quite simple: WebNov 19, 2015 · In the Proyect table, you should have a list of Stages, not ints, since you are relating to the Stage object. You can use the virtual keyword to use lazyloading on your related entities. If you really need a list of type int, containing your stage Ids, just use an unmapped property.
WebAug 14, 2024 · IQueryable questions = context.Questions; foreach (int tagid in tagsid) { questions = questions.Where (w=> w.QuestionTags.Select (s=> s.TagId).Contains (tagid)); } Building the query this way means the question must have atleast all of the tags specified in your parameter. So essential if your parameter has id 1,2,3 the query goes. WebJul 30, 2013 · 1. Use List's Contains method which will is translated to sql's in operator. I Suggest that you try to get a list of Homes with their CityBlock and City property included, then you can use linq to get all cities: var repository = new GenericRepository (); var homes = repository.Get (home => homeIdList.Contains (home.Id), includeProperties ...
WebJun 22, 2016 · I want the list of objects to be in the same order as our product list. I assume by our product list you mean the productIdList variable used for filtering. You cannot do that in LINQ to Entities, so you have to switch to LINQ to Objects and do the ordering in memory. One way would be to use IndexOf method:
WebIn Entity Framework, you can generate GUIDs automatically for new entities by using the DatabaseGenerated attribute with the DatabaseGeneratedOption.Identity option on the primary key property of the entity.. Here's an example: csharppublic class MyEntity { [Key] [DatabaseGenerated(DatabaseGeneratedOption.Identity)] public Guid Id { get; set; } // … mccolls flixton roadWebJul 13, 2011 · Add a comment. 1. You could also use a LINQ approach, as follows: Customer customerRecord = (from customer in Entities.Customers where customer.id == 20 select customer).FirstOrDefault (); Using FirstOrDefault () will return null if the element with that ID doesn't exist, as opposed to First () which will throw an exception. mccolls fleet listWebMar 29, 2024 · Table-specific facet configuration. EF Core offers a lot of flexibility when it comes to mapping entity types to tables in a database. This becomes even more useful when you need to use a database that wasn't created by EF. The below techniques are described in terms of tables, but the same result can be achieved when mapping to … mccolls finglassieWebЯ использую C # с Entity Framework 6.1.3 и SQL Server. У меня есть следующие сущности: public partial class Contract { public Contract() { this.Records = new List(); } public int Id { get; set; } public string Name { get; set; } public string CreatedBy { get; set; } public string ModifiedBy { get; set; } public System.DateTime … lewis dots periodic tableWebFeb 10, 2016 · How do achieve this in Entity framework? sql; linq; entity-framework; Share. Improve this question. Follow ... You can shove your ids into a list and use that inside the Where to filter out only the rows in table whose id matches those in the list: var ids = new List() { 2, 10, 16, 24, 32 }; var rows = Table.Where(t => ids.Contains(t.id ... mccolls foodsWebI had been using Ladislav Mrnka's answer to successfully retrieve Ids when using the Entity Framework however I am posting here because I had been miss-using it (i.e. using it where it wasn't required) and thought I would post my findings here in-case people are looking to "solve" the problem I had.. Consider an Order object that has foreign key relationship … lewis dot of cs2WebMay 30, 2013 · Solution with .Where and .Contains has complexity of O(N square). Simple .Join should have a lot better performance (close to O(N) due to hashing). mccolls faringdon