Entity Framework: Re-finding objects recently added to context

Question

I am using the entity framework and I\'m having a problem with \"re-finding\" objects I just created... basically it goes like this:

string theId = \"someId         


        

Answer 1

Entity Framework 6

As per EF Docs Dbset always query against the database.

Note that DbSet and IDbSet always create queries against the database and will always involve a round trip to the database even if the entities returned already exist in the context. A query is executed against the database when:

It is enumerated by a foreach (C#) or For Each (Visual Basic) statement. It is enumerated by a collection operation such as ToArray, ToDictionary, or ToList. LINQ operators such as First or Any are specified in the outermost part of the query. The following methods are called: the Load extension method on a DbSet, DbEntityEntry.Reload, and Database.ExecuteSqlCommand. When results are returned from the database, objects that do not exist in the context are attached to the context. If an object is already in the context, the existing object is returned (the current and original values of the object's properties in the entry are not overwritten with database values).

When you perform a query, entities that have been added to the context but have not yet been saved to the database are not returned as part of the result set. To get the data that is in the context, see Local Data

If a query returns no rows from the database, the result will be an empty collection, rather than null.

Below is a simple snippet with local data:

await dbContext.Entity
      .Where(e => e.Title.Contains("Text"))
      .LoadAsync();

var locaEntities = dbContext.Entity.Local;

dbContext.Entity.Add(new Entity {});

// call save post atomic operation is finished.
await dbContext.SaveChangesAsync();