How to resolve conflicts
Posted: Thu 21 May 2009 14:51
Can you help me how to remove conflicted objects from Data Context?
For example if method SubmitChanges() failed (e.g. due to insertion of duplicate key), I don't know how to recover from this failure.
If I try to insert another object (with correct values) it fails again because it first tries to insert the previous object (with duplicate key).
See this example:
I suppose that there should be a 'Resolve' method to maintain the conflicts.
Thanks in advance for your help
For example if method SubmitChanges() failed (e.g. due to insertion of duplicate key), I don't know how to recover from this failure.
If I try to insert another object (with correct values) it fails again because it first tries to insert the previous object (with duplicate key).
See this example:
Code: Select all
CREATE TABLE `user_group` (
id_user INT NOT NULL,
id_group INT NOT NULL,
PRIMARY KEY(id_user, id_group));
//With values:
INSERT INTO `user_group` VALUES (1,1), (2,1);
Code: Select all
UserGroup ug = new UserGroup();
ug.Id_user = 1;
ug.Id_group = 1;
try
{
DB.UserGroups.InsertOnSubmit(ug);
DB.SubmitChanges(); // fails - it's OK (duplicate key)
}
catch
{
// I need to remove the conflicted object from dataContext here
}
ug = new UserGroup();
ug.Id_user = 3;
ug.Id_group = 1;
try
{
DB.UserGroups.InsertOnSubmit(ug);
DB.SubmitChanges(); // fails with duplicate key (1,1) - but I want to insert only values (3,1)
}
catch {}
I suppose that there should be a 'Resolve' method to maintain the conflicts.
Thanks in advance for your help