simple

Simple example project

Simple project demonstrating the use of dgraph-js, the official JavaScript client for Dgraph.

Running

Starting Local Dgraph Cluster

You will need to install Dgraph v21.3.2 or above and run it.

You can run the commands below to start a clean Dgraph server every time, for testing and exploration.

First, create two separate directories for dgraph zero and dgraph alpha.

mkdir -p local-dgraph-data/zero local-dgraph-data/data

Then start dgraph zero:

cd local-dgraph-data/zero
rm -r zw; dgraph zero

Finally, start the dgraph alpha:

cd local-dgraph-data/data
rm -r p w; dgraph alpha --zero localhost:5080

For more configuration options, and other details, refer to docs.dgraph.io

Install dependencies

npm install

Run the sample code

For Node.js, run:

npm run run
or
yarn run

Your output should look something like this (uid values may be different):

Created person named "Alice" with uid = 0x7569

All created nodes (map from blank node names to uids):
alice => 0x7569
dg.1447158641.7 => 0x756a
dg.1447158641.8 => 0x756b
dg.1447158641.9 => 0x756c

Number of people named "Alice": 1
{ uid: '0x7569',
  name: 'Alice',
  age: 26,
  married: true,
  loc: { type: 'Point', coordinates: [ 1.1, 2 ] },
  dob: '1980-02-01T17:30:00Z',
  friend: [ { name: 'Bob', age: 24 }, { name: 'Charlie', age: 29 } ],
  school: [ { name: 'Crown Public School' } ] }
Number of people named "Alice": 0
Created person named "Alice" with uid = 0x19

All created nodes (map from blank node names to uids):
alice => 0x19
dg.3973478125.10 => 0x16
dg.3973478125.11 => 0x17
dg.3973478125.12 => 0x18

Number of people named "Alice": 1
{ uid: '0x19',
  name: 'Alice',
  age: 26,
  married: true,
  loc: { type: 'Point', coordinates: [ 1.1, 2 ] },
  dob: '1980-02-01T17:30:00Z',
  friend: [ { name: 'Bob', age: 24 }, { name: 'Charlie', age: 29 } ],
  school: [ { name: 'Crown Public School' } ] }

DONE!

You can explore the source code in the index.js file.