Neo4j.Sips

A simple Elixir wrapper around the Neo4j graph database REST API.

Install

From hex.pm. Edit the mix.ex file and add the neo4j_sips dependency to the deps/1 function:

defp deps do
  [{:neo4j_sips, "~> 0.1"}]
end

or from Github:

defp deps do
  [{:neo4j_sips, github: "florinpatrascu/neo4j_sips"}]
end

If you're using a local development copy:

defp deps do
  [{:neo4j_sips, path: "../neo4j_sips"}]
end

Then add the neo4j_sips dependency the applications list:

def application do
  [applications: [:logger, :neo4j_sips]]
end

Edit the config/config.exs and describe a Neo4j server endpoint, example:

config :neo4j_sips, Neo4j,
  url: "http://localhost:7474",
  pool_size: 5,
  max_overflow: 2,
  timeout: 30

Run mix do deps.get, deps.compile

If your server requires basic authentication, add this to your config file:

  basic_auth: [username: "foo", password: "bar"]

Or:

  token_auth: "bmVvNGo6dGVzdA==" # if using an authentication token?!

Example

With a minimalist setup configured as above, and a Neo4j server running, we can connect to the server and run some queries using Elixir’s interactive shell (IEx):

$ cd <my_mix_project>
$ iex -S mix
Erlang/OTP 18 [erts-7.2.1] [source] [64-bit] ...

Interactive Elixir (1.2.3) - press Ctrl+C to exit (type h() ENTER for help)
iex(1)> alias Neo4j.Sips, as: Neo4j

iex(2)> cypher = """
  CREATE (n:Neo4jSips {title:'Elixir sipping from Neo4j', released:2015, 
    license:'MIT', neo4j_sips_test: true})
"""

iex(3)> Neo4j.query(Neo4j.conn, cypher)
{:ok, []}

iex(4)> n = Neo4j.query!(Neo4j.conn, "match (n:Neo4jSips {title:'Elixir sipping from Neo4j'}) where n.neo4j_sips_test return n")
[%{"n" => %{"license" => "MIT", "neo4j_sips_test" => true, "released" => 2015,
     "title" => "Elixir sipping from Neo4j"}}]

For more examples, see the test suites.

Contributing

• Fork it
• Create your feature branch (git checkout -b my-new-feature)
• Test (mix test)
• Commit your changes (git commit -am 'Add some feature')
• Push to the branch (git push origin my-new-feature)
• Create new Pull Request

Author

Florin T.PATRASCU (@florinpatrascu)

License

• Neo4j.Sips - MIT, check LICENSE file for more information.
• Neo4j - Dual free software/commercial license, see http://neo4j.org/