private bool TryIgnoreNonFieldConflict(MigrationConflict conflict)
{
long targetChangeActionId;
bool retVal = WITEditEditConflictType.TryGetConflictedTargetChangeActionId(conflict.ConflictDetails, out targetChangeActionId);
if (!retVal)
{
// backward compatibility:
// old-style edit/edit conflict details does not include target change action id
// in that case, we can't find a change action to complete the anlaysis
return(false);
}
using (RuntimeEntityModel context = RuntimeEntityModel.CreateInstance())
{
// find the target-side change action (should be a delta table entry)
var targetChangeActionQuery = context.RTChangeActionSet.Where(a => a.ChangeActionId == targetChangeActionId);
if (targetChangeActionQuery.Count() != 1)
{
return(false);
}
RTChangeAction targetChangeAction = targetChangeActionQuery.First();
XmlDocument targetSideChanges = new XmlDocument();
targetSideChanges.LoadXml(targetChangeAction.ActionData);
// if there are edits on the same field, we *cannot* ignore the conflict
return(!(EditOnSameField(conflict.ConflictedChangeAction.MigrationActionDescription, targetSideChanges)));
}
}
private bool TakeSource(MigrationConflict conflict)
{
// find the target-side change action (should be a delta table entry)
// SIDE NOTE:
// upon detection of a wit edit/edit conflict, we create
// 1. an edit/edit conflict for the source side change group/action
// 2. a chainonconflictconflict for the target side's (using the source-side conflict id as the scopehint)
// look up for target-side conflicted change action id
long targetChangeActionId;
bool retVal = WITEditEditConflictType.TryGetConflictedTargetChangeActionId(conflict.ConflictDetails, out targetChangeActionId);
if (!retVal)
{
// backward compatibility:
// old-style edit/edit conflict details does not include target change action id
// in that case, we can't find a change action to complete the anlaysis
return(false);
}
using (RuntimeEntityModel context = RuntimeEntityModel.CreateInstance())
{
Debug.Assert(conflict.ConflictedChangeAction != null, "Edit/Edit conflict ConflictedCangeAction is NULL");
// Extract all fields updated in the target change action
string[] sourceSideChangedFields = ExtractFieldRefNames(conflict.ConflictedChangeAction.MigrationActionDescription);
// find the target-side change action (should be a delta table entry)
var changeActionQuery = context.RTChangeActionSet.Where(a => a.ChangeActionId == targetChangeActionId);
if (changeActionQuery.Count() != 1)
{
return(false);
}
RTChangeAction targetChangeAction = changeActionQuery.First();
// drop the source-side updated fields from the target-side change
// example:
// source side change includes Field1, Field2, Field3
// target side change includes Field1, Field2, Field5, Field 6
// By taking source, we want to migrate Field1, Field2, Field3 to target side
// Then migrate Field5, Field 6 to source side, i.e. dropping Field1, Field2
XmlDocument targetSideChanges = new XmlDocument();
targetSideChanges.LoadXml(targetChangeAction.ActionData);
DropFields(targetSideChanges, sourceSideChangedFields);
// update result for target change
targetChangeAction.ActionData = targetSideChanges.OuterXml;
SkipChangeWithZeroFieldUpdates(targetChangeAction);
context.TrySaveChanges();
return(true);
}
}
private bool TakeTarget(MigrationConflict conflict)
{
// look up for target-side conflicted change action id
long targetChangeActionId;
bool retVal = WITEditEditConflictType.TryGetConflictedTargetChangeActionId(conflict.ConflictDetails, out targetChangeActionId);
if (!retVal)
{
// backward compatibility:
// old-style edit/edit conflict details does not include target change action id
// in that case, we can't find a change action to complete the anlaysis
return(false);
}
using (RuntimeEntityModel context = RuntimeEntityModel.CreateInstance())
{
Debug.Assert(conflict.ConflictedChangeAction != null, "Edit/Edit conflict ConflictedCangeAction is NULL");
// find the target-side change action (should be a delta table entry)
var changeActionQuery = context.RTChangeActionSet.Where(a => a.ChangeActionId == targetChangeActionId);
if (changeActionQuery.Count() != 1)
{
return(false);
}
RTChangeAction targetChangeAction = changeActionQuery.First();
// Extract all fields updated in the target change action
XmlDocument targetSideChanges = new XmlDocument();
targetSideChanges.LoadXml(targetChangeAction.ActionData);
string[] targetSideChangedFields = ExtractFieldRefNames(targetSideChanges);
// drop the target-side updated fields from the source-side change
// example:
// target side change includes Field1, Field2, Field3
// source side change includes Field1, Field2, Field5, Field 6
// By taking target, we want to migrate Field1, Field2, Field3 to source side
// Then migrate Field5, Field 6 to target side, i.e. dropping Field1, Field2
DropFields(conflict.ConflictedChangeAction.MigrationActionDescription, targetSideChangedFields);
// update result for source change
if (!ChangeContainsFieldUpdates(conflict.ConflictedChangeAction.MigrationActionDescription))
{
conflict.ConflictedChangeAction.ChangeGroup.Status = ChangeStatus.Skipped;
conflict.ConflictedChangeAction.ChangeGroup.Save();
}
// since we will return ConflictResolutionType.UpdatedConflictedChangeAction, conflict manager will update the conflicted change action for us
return(true);
}
}