Cayley
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Getting Started
This guide will take you through starting a graph based on provided data.
Prerequisites
This tutorial requires you to be connected to local Cayley installation. For more information on installing Cayley locally, see Install Cayley.
Start Cayley
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cayley http
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You should see:
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Cayley version: 0.7.7 (dev snapshot)
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using backend "memstore"
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listening on 127.0.0.1:64210, web interface at http://127.0.0.1:64210
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Cayley is configured by default to run in memory (That's what
backend memstore means). To change the configuration see the documentation for Configuration File or run cayley http --help.Run with sample data
Download sample data
Run Cayley
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cayley http --load 30kmoviedata.nq.gz
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Query Data
Using the 30kmoviedata.nq dataset from above, let's walk through some simple queries:
Query all vertices in the graph
To select all vertices in the graph call, limit to 5 first results.
g and V are synonyms for graph and Vertex respectively, as they are quite common.1
g.V().getLimit(5);
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Match a property of a vertex
Find vertex with property "Humphrey Bogart"
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g.V()
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.has("<name>", "Humphrey Bogart")
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.all();
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You may start to notice a pattern here: with Gizmo, the query lines tend to:
Start somewhere in the graph | Follow a path | Run the query with "all" or "getLimit"
Match a complex path
Get the list of actors in the film
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g.V()
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.has("<name>", "Casablanca")
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.out("</film/film/starring>")
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.out("</film/performance/actor>")
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.out("<name>")
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.all();
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Match
This is starting to get long. Let's use a Morphism, a pre-defined path stored in a variable, as our linkage
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var filmToActor = g
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.Morphism()
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.out("</film/film/starring>")
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.out("</film/performance/actor>");
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g.V()
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.has("<name>", "Casablanca")
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.follow(filmToActor)
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.out("<name>")
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.all();
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Last modified 1yr ago