WebConvert object of any type to JObject with Json.NET; Cannot find Microsoft.Office.Interop Visual Studio; How to directly execute SQL query in C#? Why not inherit from List? Error: No Entity Framework provider found for the ADO.NET provider with invariant name 'System.Data.SqlClient' The network path was not found WebJun 3, 2016 · Just set the foreign key and let country be null (this is why it's useful to have the foreign key property): var city = new City { city = cityTxt, countryId = country.id /* don't set country */ }; ctx.Cities.Add (city); Load the country from …
c# - Entity Framework lazy loading does not work (foreign key object ...
WebMay 3, 2010 · In EF4 lazy loading is included and is on by default. No such luck in prior versions: You may need to add an .Include () to fetch the other data automatically (eager loading) or call Load () on the references to load them (manually). If the reference table was say "Details" you would do ... var featuredOffers = context.Hosters_FeaturedOffer ... WebFeb 7, 2024 · I can see in SQL Server that the tables are created, and that a Movies.Revenue_Id column has been created, with a foreign key relationship to Revenue.Id. If I try to query it using SQL, it works fine: SELECT Movies.Name, … christian literature based homeschool
Foreign key not populating in Entity Framework - Stack Overflow
WebNov 21, 2024 · 1. You need to tell EF that the position exists. You can do this by fetching it into tracking or by setting its entity state: context.Entry (toModel.Position).State = EntityState.Unchanged;. Since it appears you are using a repository you will need to adjust accordingly. See here. – Steve Greene. WebI am trying to query this games table, the foreign keys of the virtual declared attributes gets inserted correctly, but when I try to query the games table, every foreign key object is null, so lazy loading does not seem to work. HOWEVER on the first start of the application, when I am inserting new data into the database, it does work. WebNote that we use the virtual keyword to enable lazy loading of the related Customer entity. After adding the foreign key property to your entity model, you should be able to create and update entities that have a one-to-many relationship in Entity Framework without encountering the "The foreign key component ... is not a declared property on ... christian literary agents list