StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

POEF 5.0 Foreign Key Not Updating
primarykey
Id
20294849
data
AcceptedAnswerId
0
AnswerCount
1
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2013-11-29T23:49:47.590
FavoriteCount
0
LastActivityDate
2013-12-02T20:08:50.223
LastEditDate
2013-12-02T20:08:50.223
LastEditorUserId
650109
OwnerUserId
650109
ParentId
0
PostTypeId
1
Score
0
ViewCount
29
LastEditorDisplayName
text
Body
I know there are some other questions regarding this-- but I was unable to get them to solve my problem. I have the following classes: <pre><code>public class Category { public Category() { Products = new List<Product>(); } public int Id { get; set; } public string Name { get; set; } public List<Product> Products { get; set; } public override string ToString() { return String.Format("{0}{1}", Id, Name); } } </code></pre> and <pre><code>public class Product { public int Id { get; set; } public string Name { get; set; } public decimal Price { get; set; } public Category Category { get; set; } public override string ToString() { return String.Format("{0}{1}", Id, Name); } } </code></pre> I've got some code which attempts to update both a product and it's category: <pre><code> using (var ctx = GetCtx()) { var beverages = new Category {Id = 1 }; var milk = new Product { Name = "MILK", Id = 4, Category = new Category { Id = 1} }; ctx.Entry(milk).State = System.Data.EntityState.Modified; ctx.SaveChanges(); } </code></pre> this results in the following sql statement: <pre><code>update [dbo].[Products] set [Name] = @0, [Price] = @1 where ([Id] = @2) @0: MILK @1: 0 @2: 4 </code></pre> I can't figure out how to make sure that the Category for the particular product is updated. I thought about adding a property to Product for Category_Id but this results in an additional column being generated in my database. EDIT: I think I figured this out-- after watching Julia Lerman's series on EF (Pluralsight)-- the way to set up this class is like this: <pre><code>public class Product { public int Id { get; set; } [Required] [MaxLength(200)] public string Name { get; set; } public virtual Category Category { get; set; } public int CategoryId { get; set; } } </code></pre> This results in only one foreign key column in the Products table. The Category of the Product gets updated when updating the CategoryId property.
Tags
<ef-code-first><entity-framework-5><foreign-key-relationship>
Title
EF 5.0 Foreign Key Not Updating
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USek_ny
UserOwnerUserId
1. USek_ny
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
 singulars
 PostTypePostTypeId
 PTAnswer
VotesPostIdCreationDate
1. This table or related slice is empty.
CommentsPostId
1. This table or related slice is empty.

Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.