Ecto Extensions

Useful Ecto extensions:

Sortable
Pageable
Searchable
Validators

Documentation: https://hexdocs.pm/ecto_extensions

Please note: this project is a work-in-progress. Breaking changes may occur.

Install

Add EctoExtensions to mix.exs:

[{:ecto_extensions, "~> 0.0.2"}]

Example usage

Search, sort and paginate

Repo module:

defmodule BlogApp.Repo do
  # ...
  use EctoExtensions # <- add this!
end

Schema module:

defmodule BlogApp.Post do
  use Ecto.Schema

  use EctoExtensions.Sortable, fields: [:title, :published_at],
                               default: {:published_at, :desc}

  use EctoExtensions.Searchable, fields: [:title, :content]

  schema "posts" do
    field :title
    field :content
    field :published_at, :utc_datetime
  end
end

Context module:

defmodule BlogApp.Posts do
  @doc """

  ## Params
  * :search - search query string
  * :sort_by - field to sort by
  * :sort_order - :asc or :desc
  * :page - integer
  * :page_size - integer

  """
  def list_posts(params) do
    Post
    |> Repo.search(Post, params)
    |> Repo.sort(Post, params)
    |> Repo.paginate(params)
  end
end

Controller and View:

defmodule BlogAppWeb.PostController do
  def index(conn, params) do
    page = Posts.list_posts(params)
    render(conn, "index.json", %{page: page})
  end
end

defmodule BlogAppWeb.PostView do
  def render("index.json", %{page: page}) do
    %{
      page: page.page,
      page_size: page.page_size,
      total_pages: page.total_pages,
      total_entries: page.total_entries,
      posts: render_many(page.entries, PostView, "post.json")
    }
  end

  def render("post.json", %{post: post}) do
    # ...
  end
end

Validators

Schema module:

defmodule BlogApp.User do
  use Ecto.Schema

  import EctoExtensions.Validators # <- add this!

  schema "users" do
    field :email
  end

  def changeset(struct, params) do
    struct
    |> cast(params, [:email])
    |> validate_email()
  end
end

Contributing

Fork it
mix deps.get
mix ecto.reset
Make your changes
mix test
Create a pull-request

License

EctoExtensions is released under the MIT license. See LICENSE file for details.

About MLSDev

EctoExtensions package is maintained by MLSDev, Inc. We specialize in providing all-in-one solution in mobile and web development. Our team follows Lean principles and works according to agile methodologies to deliver the best results reducing the budget for development and its timeline.

Find out more here and don't hesitate to contact us!