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neo4j_sips
Elixir driver for the Neo4j graph database server
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README
Neo4j.Sips.Models
Minimalistic Model support for the Neo4j.Sips Elixir driver.
Install
If available on Hex.pm, edit the mix.ex
configuration file and add the neo4j_sips_models
dependency to the deps/1
function:
defp deps do
[{:neo4j_sips_models, "~> 0.1"}]
end
or Github:
defp deps do
[{:neo4j_sips_models, github: "florinpatrascu/neo4j_sips_models"}]
end
Or, if you're using a local development copy:
defp deps do
[{:neo4j_sips_models, path: "../neo4j_sips_models"}]
end
Then add the neo4j_sips_models
dependency the applications list:
def application do
[applications: [:logger, :neo4j_sips_models]]
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?!
Usage
You can easily define your own Neo4j Models like this:
defmodule Person do
use Neo4j.Sips.Model
field :name, required: true
field :email, required: true, unique: true, format: ~r/\b[a-z0-9._%+-]+@[a-z0-9.-]+\.[a-z]{2,4}\b/
field :age, type: :integer
field :doe_family, type: :boolean, default: false # used for testing
field :neo4j_sips, type: :boolean, default: true
validate_with :check_age
relationship :FRIEND_OF, Person
relationship :MARRIED_TO, Person
def check_age(model) do
if model.age == nil || model.age <= 0 do
{:age, "model.validation.invalid_age"}
end
end
end
and use in various scenarios. Example from various tests file:
assert {:ok, john} = Person.create(name: "John DOE", email: "[email protected]",
age: 30, doe_family: true,
enable_validations: true)
assert john != nil
assert {:ok, jane} = Person.create(name: "Jane DOE", email: "[email protected]",
age: 25, enable_validations: true, doe_family: true,
married_to: john)
on_exit({john, jane}, fn ->
assert :ok = Person.delete(john)
assert :ok = Person.delete(jane)
end)
...
# model find
test "find Jane DOE" do
persons = Person.find!(name: "Jane DOE")
assert length(persons) == 1
person = List.first(persons)
assert person.name == "Jane DOE"
assert person.email == "[email protected]"
assert person.age == 25
end
test "find John DOE" do
persons = Person.find!(name: "John DOE")
assert length(persons) == 1
person = List.first(persons)
assert person.name == "John DOE"
assert person.email == "[email protected]"
assert person.age == 30
end
...
# serialization
Person.to_json(jane)
# support for relationships
relationship_names = Person.metadata.relationships |> Enum.map(&(&1.name))
relationship_related_models = Person.metadata.relationships |> Enum.map(&(&1.related_model))
assert relationship_names == [:FRIEND_OF, :MARRIED_TO]
assert relationship_related_models == [Person, Person]
...
#support for validation
test "invalid mail format" do
{:nok, nil, person} = Person.create(name: "John Doe", email: "johndoe.example.com", age: 30)
assert Enum.find(person.errors[:email], &(&1 == "model.validation.invalid")) != nil
end
test "invalid age value" do
{:nok, nil, person} = Person.create(name: "John Doe", email: "[email protected]", age: -30)
assert Enum.find(person.errors[:age], &(&1 == "model.validation.invalid_age")) != nil
end
## and more
For more examples, see the test suites.
Contributing
To contribute you need to compile Mongo.Ecto from source and test it:
$ git clone https://github.com/florinpatrascu/neo4j_sips_models
$ cd neo4j_sips_models
$ mix test
Special thanks
This project is based on the work started by: Rawane ZOSSOU. Thank you, @raw1z!
License
- Neo4j.Sips.Model - MIT, check [LICENSE](LICENSE) file for more information.
- Neo4j - Dual free software/commercial license, see http://neo4j.org/
*Note that all licence references and agreements mentioned in the neo4j_sips_models README section above
are relevant to that project's source code only.