Cassandra Adapter for Ecto (the language integrated query for Elixir)
# In your config/config.exs file
config :my_app, ecto_repos: [Sample.Repo]
config :my_app, Sample.Repo,
adapter: EctoCassandra.Adapter,
keyspace: "ecto_simple",
contact_points: ["localhost"],
replication: [
class: "SimpleStrategy",
replication_factor: 1,
]
# In your application code
defmodule Sample.Repo.Migrations.CreateUser do
use Ecto.Migration
def change do
create table(:users, primary_key: false) do
add :id, :id, partition_key: true
add :age, :integer, clustering_column: true
add :name, :string
add :email, :string
add :password_hash, :string
timestamps()
end
end
end
defmodule Sample.Repo do
use Ecto.Repo, otp_app: :my_app
end
defmodule Sample.User do
use Ecto.Schema
@primary_key false
schema "users" do
field :username, primary_key: true
field :age, :integer
field :name # Defaults to type :string
field :email
field :password_hash
field :password, :string, virtual: true
end
end
defmodule Sample.App do
import Ecto.Query
alias Sample.{Repo, User}
def keyword_query do
Repo.all from u in User,
where: u.username == "john",
select: u.email
end
def pipe_query do
User
|> where([u], u.age > 10)
|> order_by(:age)
|> limit(10)
|> Repo.all
end
def get_by_name do
Repo.get_by(username: "john")
end
end