OrientDB-NET - AddOrUpdate<T>()

This method adds a new record to the database. In the event that the record already exists, it updates the record with new data.

Adding or Updating Records

In deployments where there is the risk of the database changing while the transaction is open or where you are uncertain if a class exists on the database, you can call the AddOrUpdate() method to add a new record or update an existing one, depending on whether or not the record exists already on the database.

Syntax

OTranasction.AddOrUpdate<T>(T target)

• target Defines the object you want to add or update on the database. It is of the type defined by the generic.

Example

For instance, if you find yourself often adding or updating records with complex, but routine, ifnromation, you may find it useful to implement a helper function to simplify these operations.

using Orient.Client;
using System;
...

// ADD OR UPDATE TRANSACTION
public void TrxUpdate(OTransaction trx, Dictionary<ORID, Dictionary<string, string>> records)
{
   // LOG OPERATION
   Console.WriteLine("Updating Records in Transaction");

   // LOOP OVER RECORDS
   foreach(KeyValuePair<ORID, Dictionary<string, string>> record in records)
   {
      // LOAD RECORD
      ODocument document = LoadRecord().ORID(record.Key);

      // DEFINE FIELDS
      foreach(KeyValuePair<string, string> field in record.Value)
      {
          // SET FIELD
          document.SetField<string>(field.Key, field.Value);
      }

      // ADD OR UPDATE RECORD
      trx.AddOrUpdate<ODocument>(document);
   }
}