IMetabaseUpdateUserEvents.OnAskConstraintsHandling

Syntax

OnAskConstraintsHandling(

Details: String;

Update - update applied to the current repository.

Node - update object, for which the event is generated.

Details - information about error.

Handling - variable that determines an integrity constraint handling method.

The OnAskConstraintsHandling method implements an event that occurs if it is necessary to handle data integrity constraint of the updated object.

Public Class CUpdateEvents: UpdateEvents

Public Sub OnBeginUpdate(Update: IMetabaseUpdate);

Var

Flag: IMetabaseUpdateProperty;

Begin

Debug.WriteLine("Update of repository objects");

Flag := Update.Properties.FindById("Ver");

If Flag <> Null Then

Flag.Value := "1.1";

End If;

End Sub OnBeginUpdate;

Public Sub OnAskConstraintsHandling(Update: IMetabaseUpdate; Node: IMetabaseUpdateNode;

Details: String;

Var Handling: UpdateDataConstraintsHandlingType);

Begin

Handling := UpdateDataConstraintsHandlingType.KeepTableUnchanged;

End Sub OnAskConstraintsHandling;

Public Sub OnAskReflectRights(Var Cancel: Boolean);

Begin

Cancel := True;

End Sub OnAskReflectRights;

Public Sub OnUpdateObject(Update: IMetabaseUpdate; CurrentNode: IMetabaseUpdateNode; Var Skip: Boolean);

Begin

If CurrentNode.NodeType = MetabaseUpdateNodeType.DeleteObject Then

Skip := True;

End If;

End Sub OnUpdateObject;

Public Sub OnEndUpdate(Update: IMetabaseUpdate);

Begin

Debug.WriteLine("Update of objects is completed");

End Sub OnEndUpdate;

End Class CUpdateEvents;

This example is a template for update unit. On applying of update that contains this unit the following is checked:

If update contains an update flag with the Ver identifier, a value "1.1" is assigned to this flag. Only the objects, for which an update condition equals to "Ver=1.1", are updated.
On data integrity violation the update of the whole object is skipped.
Permissions for objects, for which it is necessary, will be updated only on the platform level.
In update, the elements that delete repository objects are skipped.