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POSDN save nodes and update properties on attached relationships
 

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  1. POSDN save nodes and update properties on attached relationships
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    <p>We are using spring-data-neo4j release 2.2.2.Release and Neo4j 1.9</p> <p>Saving and updating nodes (properties) works fine using a GraphRepository</p> <p>Our most simple example looks like this:</p> <pre><code>public interface LastReadMediaRepository extends GraphRepository&lt;Neo4jLastReadMedia&gt; {} </code></pre> <p>We also set some relationships connected to a node, the node class looks like this</p> <pre><code>@NodeEntity public class Neo4jLastReadMedia { @GraphId Long id; @JsonIgnore @Fetch @RelatedToVia(type = "read", direction = Direction.OUTGOING) Set&lt;LastReadMediaToLicense&gt; licenseReferences; public Neo4jLastReadMedia() { } public Long getId() { return id; } public void setId(Long id) { this.id = id; } public void read(final Neo4jLicense license, final Long lastAccess, final float progress, final Long chapterId) { licenseReferences.add(new LastReadMediaToLicense(this, license, lastAccess, progress, chapterId)); } public Set&lt;LastReadMediaToLicense&gt; getLicenseReferences() { return licenseReferences; } @Override public String toString() { return "Neo4jLastReadMedia [id=" + id + "]"; } } </code></pre> <p>Now, we save a node using the repository's <code>save()</code> method. The relationships are saved, too, at least for the first <strong>save</strong>.</p> <p>Later when we want to change properties on a relationship (<strong>update</strong> a relationship) that already exists (e.g. lastAccess) we retrieve the node from the database, manipulate its relationship Set, here <code>Set&lt;LastReadMediaToLicense&gt; licenseReferences;</code> and then, try to save the node back with <code>save()</code></p> <p>Unfortunately, the relationship is not updated and all properties remain the same...</p> <p>We know how to do that using annotated cypher queries in the repo, but there has to be an "abstracted" way?!</p> <p>Thanks a lot!</p> <p>Regards</p> <p><strong>EDIT:</strong> If I remove a relationship from the Set, then perform a save() on the node, the relationship is deleted. Only update does not work! Or is that the intention?</p>
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    1. COCan you please provide a code example showing the failing update?
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      1. USremigio
 

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