public void SaveReferenceProperty(int versionId, PropertyType propertyType, IEnumerable <int> value)
{
if (propertyType == null)
{
throw new ArgumentNullException("propertyType");
}
// Remove/Add referredNodeIds to update the database state to the proper one
SqlProcedure cmd = null;
try
{
string referredListXml = SqlProvider.CreateIdXmlForReferencePropertyUpdate(value);
cmd = new SqlProcedure {
CommandText = "proc_ReferenceProperty_Update"
};
cmd.Parameters.Add("@VersionId", SqlDbType.Int).Value = versionId;
cmd.Parameters.Add("@PropertyTypeId", SqlDbType.Int).Value = propertyType.Id;
cmd.Parameters.Add("@ReferredNodeIdListXml", SqlDbType.Xml).Value = referredListXml;
cmd.ExecuteNonQuery();
}
finally
{
cmd.Dispose();
}
}
public void SaveReferenceProperty(int versionId, PropertyType propertyType, IEnumerable <int> value)
{
if (propertyType == null)
{
throw new ArgumentNullException("propertyType");
}
for (short tryAgain = 3; tryAgain > 0; tryAgain--)
{
// Optimistic approach: try to save the value as is, without checking and compensate if it fails
try
{
// Create XML
var referredListXml = SqlProvider.CreateIdXmlForReferencePropertyUpdate(value);
// Execute SQL
using (var cmd = new SqlProcedure {
CommandText = "proc_ReferenceProperty_Update"
})
{
cmd.Parameters.Add("@VersionId", SqlDbType.Int).Value = versionId;
cmd.Parameters.Add("@PropertyTypeId", SqlDbType.Int).Value = propertyType.Id;
cmd.Parameters.Add("@ReferredNodeIdListXml", SqlDbType.Xml).Value = referredListXml;
cmd.ExecuteNonQuery();
// Success, don't try again
tryAgain = 0;
}
}
catch (SqlException exc)
{
// This was the last try and it failed, throw
if (tryAgain == 1)
{
throw;
}
// The value contains a node ID which no longer exists in the database, let's compensate for that
if (exc.Message.Contains("The INSERT statement conflicted with the FOREIGN KEY constraint \"FK_ReferenceProperties_Nodes\"."))
{
// Get node heads for the IDs
var heads = DataProvider.Current.LoadNodeHeads(value);
// Select the IDs of the existing node heads
value = heads.Where(h => h != null).Select(h => h.Id);
}
else
{
// If the error is something else, just throw it up
throw;
}
}
}
}