I'm deleting a parent entity in my MVC controller and getting this error:
[SqlException]: The DELETE statement conflicted with the REFERENCE constraint "FK_dbo.MessageThread_dbo.Listings_ListingID". The conflict occurred in database "MyDB", table "dbo.MessageThread", column 'ListingID'. The statement has been terminated. at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
MessageThread table is mapped in EF like this:
// Relationships
this.HasOptional(t => t.Listing)
.WithMany(t => t.MessageThreads)
.HasForeignKey(d => d.ListingID);
The ListingID
(parent) column in MessageThread
(child) is nullable
I've looked at this post but the answers didn't make it work.
According to this , shouldn't the EF mapping delete the parent record and set the child ListingID
values in MessageThread
to null
?
You are unable to delete from this table
dbo.MessageThread", column 'ListingID'
Because you have a Foreign Key to this table
FK_dbo.MessageThread_dbo.Listings_ListingID
Delete the foreign key field value first before you proceed.
or you can do it by Cascading Deletion
take a look at this link
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