![DEFINE A SCHEMA
var schema = {
"propertyKeys": [
{"name": "name", "dataType": "String", "cardinality": "SINGLE"},
],
"vertexLabels": [
{"name": "person"},
],
"edgeLabels": [
{"name": "tweets", "multiplicity": "MULTI"},
],
"vertexIndexes": [
{"name": "vByName", "propertyKeys": ["name"], "composite": true, "unique": true},
],
"edgeIndexes" :[
{"name": "eByTime", "propertyKeys": ["time"], "composite": true, "unique": false}
]
}](https://image.slidesharecdn.com/nodeinteractive2016-161202144830/85/Use-IBM-Graph-from-NodeJS-8-320.jpg)
Use IBM Graph from NodeJS
- 5. INIT SESSION # Change the credentials to reflect your `apiURL`, `username`, and `password` and test the code in your instance. { "credentials": { "apiURL": "https://ibmgraph-alpha.ng.bluemix.net/a261eac3-6956-4185-a789-8e24c475e89b/g", "username": "575fd2b0-c011-4b94-82cf-43244b44f3a8", "password": "aca0d011-26f5-485d-a446-182750278a27" } }; var ibmGraph= require('ibm-graph-client'); var g = new ibmGraph(instance.credentials); g.session(function(err, data) { if (err) { console.log(err); } else { g.config.session = data; console.log("Your session token is " + data); } });
- 6. CREATE A GRAPH var graph; // graph name g.graphs().create(function(err, data){ if (err) { console.log("Something went wrong: "); console.log(err); } else { graph = data.graphId; console.log('Graph created: ' + data.graphId); } });
- 7. GET ALL GRAPHS g.graphs().get(function(err, data){ if (err) { console.log(err); } console.log(data); });
- 8. DEFINE A SCHEMA var schema = { "propertyKeys": [ {"name": "name", "dataType": "String", "cardinality": "SINGLE"}, ], "vertexLabels": [ {"name": "person"}, ], "edgeLabels": [ {"name": "tweets", "multiplicity": "MULTI"}, ], "vertexIndexes": [ {"name": "vByName", "propertyKeys": ["name"], "composite": true, "unique": true}, ], "edgeIndexes" :[ {"name": "eByTime", "propertyKeys": ["time"], "composite": true, "unique": false} ] }
- 9. ADD A SCHEMA #Point your config to the new graph you just created g.config.url = g.config.url.substr(0, g.config.url.lastIndexOf('/') + 1) + graph; g.schema().set(schema, function(err, data){ if (err) { console.log(err); } console.log(JSON.stringify(data)); });
- 10. CREATE SOME VERTEXES AND EDGES gremlin = { gremlin: " def david = graph.addVertex(T.label, 'person', 'name', 'David', 'verified', false); def browniesTweet = graph.addVertex(T.label, 'tweet', 'tweet', 'I love brownies #baking @Joseph', 'sentiment', 'loving', 'tone', 'e david.addEdge('tweets', browniesTweet); browniesTweet.addEdge('hashes', bakingHashtag); browniesTweet.addEdge('mentions', joseph); ", bindings: {} } g.gremlin(gremlin, function(err,data){ if (err) { console.log(err); } console.log(JSON.stringify(data)); });
- 11. QUERY THE GRAPH gremlin = { "gremlin": "graph.traversal().V().hasLabel('person').has('name', name).outE('favorites').inV();", "bindings": { "name": "Kamal" } } g.gremlin(gremlin, function(err,data){ if (err) { console.log('Error: ' + err); } console.log(JSON.stringify(data)); });