Important | |
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To update an index entry, old one must be removed and a new one added. |
Remember that a node or relationship can be associated with any number of key-value pairs in an index, which means that you can index a node or relationship with many key-value pairs that have the same key. In the case where a property value changes and you’d like to update the index, it’s not enough to just index the new value - you’ll have to remove the old value as well.
Here’s a code example for that demonstrates how it’s done:
// create a node with a property Node fishburn = graphDb.createNode(); fishburn.setProperty( "name", "Fishburn" ); // index it actors.add( fishburn, "name", fishburn.getProperty( "name" ) ); // update the index entry actors.remove( fishburn, "name", fishburn.getProperty( "name" ) ); fishburn.setProperty( "name", "Laurence Fishburn" ); actors.add( fishburn, "name", fishburn.getProperty( "name" ) );
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