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https://github.com/smpallen99/ex_admin

ExAdmin is an auto administration package for Elixir and the Phoenix Framework
https://github.com/smpallen99/ex_admin

admin-dashboard administration elixir hex mix-tasks package phoenix-framework

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ExAdmin is an auto administration package for Elixir and the Phoenix Framework

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# ExAdmin



[![Build Status][travis-img]][travis] [![Hex Version][hex-img]][hex] [![License][license-img]][license]



[travis-img]: https://travis-ci.org/smpallen99/ex_admin.svg?branch=master

[travis]: https://travis-ci.org/smpallen99/ex_admin

[hex-img]: https://img.shields.io/hexpm/v/ex_admin.svg

[hex]: https://hex.pm/packages/ex_admin

[license-img]: http://img.shields.io/badge/license-MIT-brightgreen.svg

[license]: http://opensource.org/licenses/MIT



Note: This version has been updated to support both Ecto 1.1 and Ecto 2.0. See [Installation](#installation) for more information.



ExAdmin is an auto administration package for [Elixir](http://elixir-lang.org/) and the [Phoenix Framework](http://www.phoenixframework.org/), a port/inspiration of [ActiveAdmin](http://activeadmin.info/) for Ruby on Rails.



Checkout the [Live Demo](http://demo.exadmin.info/admin). The source code can be found at [ExAdmin Demo](https://github.com/smpallen99/ex_admin_demo).



Checkout this [Additional Live Demo](http://demo2.exadmin.info/admin) for examples of many-to-many relationships, nested attributes, and authentication.



See the [docs](https://hexdocs.pm/ex_admin/) and the [Wiki](https://github.com/smpallen99/ex_admin/wiki) for more information.



## Usage



ExAdmin is an add on for an application using the [Phoenix Framework](http://www.phoenixframework.org) to create a CRUD administration tool with little or no code. By running a few mix tasks to define which Ecto Models you want to administer, you will have something that works with no additional code.



Before using ExAdmin, you will need a Phoenix project and an Ecto model created.



![ExAdmin](http://exadmin.info/doc/ex_admin_blue.png)



### Installation



Add ex_admin to your deps:



#### Hex



mix.exs

```elixir

  defp deps do

     ...

     {:ex_admin, "~> 0.8"},

     ...

  end

```



#### GitHub with Ecto 2.0



mix.exs

```elixir

  defp deps do

     ...

     {:ex_admin, github: "smpallen99/ex_admin"},

     ...

  end

```



Add some admin configuration and the admin modules to the config file



config/config.exs

```elixir

config :ex_admin,

  repo: MyProject.Repo,

  module: MyProject,    # MyProject.Web for phoenix >= 1.3.0-rc 

  modules: [

    MyProject.ExAdmin.Dashboard,

  ]



```



Fetch and compile the dependency



```

mix do deps.get, deps.compile

```



Configure ExAdmin:



```

mix admin.install

```



Add the admin routes



web/router.ex

```elixir

defmodule MyProject.Router do

  use MyProject.Web, :router

  use ExAdmin.Router

  ...

  scope "/", MyProject do

    ...

  end



  # setup the ExAdmin routes on /admin

  scope "/admin", ExAdmin do

    pipe_through :browser

    admin_routes()

  end

```



Add the paging configuration



lib/my_project/repo.ex

```elixir

  defmodule MyProject.Repo do

    use Ecto.Repo, otp_app: :my_project

    use Scrivener, page_size: 10

  end



```



Edit your brunch-config.js file and follow the instructions that the installer appended to this file. This requires you copy 2 blocks and replace the existing blocks.



Start the application with `iex -S mix phoenix.server`



Visit http://localhost:4000/admin



You should see the default Dashboard page.



## Getting Started



### Adding an Ecto Model to ExAdmin



To add a model, use `admin.gen.resource` mix task:



```

mix admin.gen.resource MyModel

```



Add the new module to the config file:



config/config.exs



```elixir

config :ex_admin,

  repo: MyProject.Repo,

  module: MyProject,

  modules: [

    MyProject.ExAdmin.Dashboard,

    MyProject.ExAdmin.MyModel,

  ]

```



Start the phoenix server again and browse to `http://localhost:4000/admin/my_model`



You can now list/add/edit/and delete `MyModel`s.



### Changesets

ExAdmin will use your schema's changesets. By default we call the `changeset` function on your schema, although you

can configure the changeset we use for update and create seperately.



custom changeset:

```elixir

defmodule TestExAdmin.ExAdmin.Simple do

  use ExAdmin.Register



  register_resource TestExAdmin.Simple do

    update_changeset :changeset_update

    create_changeset :changeset_create

  end

end

```



#### Relationships



We support many-to-many and has many relationships as provided by Ecto. We recommend using cast_assoc for many-to-many relationships

and put_assoc for has-many. You can see example changesets in our [test schemas](test/support/schema.exs)



When passing in results from a form for relationships we do some coercing to make it easier to work with them in your changeset.

For collection checkboxes we will pass an array of the selected options ids to your changeset so you can get them and use put_assoc as [seen here](test/support/schema.exs#L26-L35)



In order to support has many deletions you need you to setup a virtual attribute on your schema's. On the related schema you will

need to add an _destroy virtual attribute so we can track the destroy property in the form. You will also need to cast this in your changeset. Here is an example changeset. In this scenario a User has many products and products can be deleted. We also have many roles associated.



```elixir

defmodule TestExAdmin.User do

  import Ecto.Changeset

  use Ecto.Schema

  import Ecto.Query



  schema "users" do

    field :name, :string

    field :email, :string

    field :active, :boolean, default: true

    has_many :products, TestExAdmin.Product, on_replace: :delete

    many_to_many :roles, TestExAdmin.Role, join_through: TestExAdmin.UserRole, on_replace: :delete

  end



  @fields ~w(name active email)



  def changeset(model, params \\ %{}) do

    model

    |> cast(params, @fields)

    |> validate_required([:email, :name])

    |> cast_assoc(:products, required: false)

    |> add_roles(params)

  end



  def add_roles(changeset, params) do

    if Enum.count(Map.get(params, :roles, [])) > 0 do

      ids = params[:roles]

      roles = TestExAdmin.Repo.all(from r in TestExAdmin.Role, where: r.id in ^ids)

      put_assoc(changeset, :roles, roles)

    else

      changeset

    end

  end

end



defmodule TestExAdmin.Role do

  use Ecto.Schema

  import Ecto.Changeset

  alias TestExAdmin.Repo



  schema "roles" do

    field :name, :string

    has_many :uses_roles, TestExAdmin.UserRole

    many_to_many :users, TestExAdmin.User, join_through: TestExAdmin.UserRole

  end



  @fields ~w(name)



  def changeset(model, params \\ %{}) do

    model

    |> cast(params, @fields)

  end

end



defmodule TestExAdmin.Product do

  use Ecto.Schema

  import Ecto.Changeset



  schema "products" do

    field :_destroy, :boolean, virtual: true

    field :title, :string

    field :price, :decimal

    belongs_to :user, TestExAdmin.User

  end



  def changeset(schema, params \\ %{}) do

    schema

    |> cast(params, ~w(title price user_id))

    |> validate_required(~w(title price))

    |> mark_for_deletion

  end



  defp mark_for_deletion(changeset) do

    # If delete was set and it is true, let's change the action

    if get_change(changeset, :_destroy) do

      %{changeset | action: :delete}

    else

      changeset

    end

  end

end

```



A good blog post exisits on the Platformatec blog describing how these relationships work: http://blog.plataformatec.com.br/2015/08/working-with-ecto-associations-and-embeds/



### Customizing the index page



Use the `index do` command to define the fields to be displayed.



admin/my_model.ex

```elixir

defmodule MyProject.ExAdmin.MyModel do

  use ExAdmin.Register

  register_resource MyProject.MyModel do



    index do

      selectable_column()



      column :id

      column :name

      actions()     # display the default actions column

    end

  end

end

```



### Customizing the form



The following example shows how to customize the form with the `form` macro:



```elixir

defmodule MyProject.ExAdmin.Contact do

  use ExAdmin.Register



  register_resource MyProject.Contact do

    form contact do

      inputs do

        input contact, :first_name

        input contact, :last_name

        input contact, :email

        input contact, :register_date, type: Date # if you use Ecto :date type in your schema

        input contact, :category, collection: MyProject.Category.all

      end



      inputs "Groups" do

        inputs :groups, as: :check_boxes, collection: MyProject.Group.all

      end

    end

  end

end

```



### Customizing the show page



The following example illustrates how to modify the show page.



```elixir

defmodule MyProject.ExAdmin.Question do

  use ExAdmin.Register



  register_resource MyProject.Question do

    menu priority: 3



    show question do



      attributes_table   # display the defaults attributes



      # create a panel to list the question's choices

      panel "Choices" do

        table_for(question.choices) do

          column :key

          column :name

        end

      end

    end

  end

end

```

## Custom Types



Support for custom field types is done in two areas, rendering fields, and input controls.



### Rendering Custom Types



Use the `ExAdmin.Render.to_string/` protocol for rendering types that are not supported by ExAdmin.



For example, to support rendering a tuple, add the following file to your project:



```elixir

# lib/render.ex

defimpl ExAdmin.Render, for: Tuple do

  def to_string(tuple), do: inspect(tuple)

end

```



### Input Type



Use the `:field_type_matching` config item to set the input type.



For example, given the following project:



```elixir

defmodule ElixirLangMoscow.SpeakerSlug do

  use EctoAutoslugField.Slug, from: [:name, :company], to: :slug

end



defmodule ElixirLangMoscow.Speaker do

  use ElixirLangMoscow.Web, :model

  use Arc.Ecto.Model



  alias ElixirLangMoscow.SpeakerSlug

  schema "speakers" do

    field :slug, SpeakerSlug.Type

    field :avatar, ElixirLangMoscow.Avatar.Type

  end

end

```



Add the following to your project's configuration:



```elixir

config :ex_admin,

  # ...

  field_type_matching: %{

    ElixirLangMoscow.SpeakerSlug.Type => :string,

    ElixirLangMoscow.Avatar.Type => :file

  }

```



## Theme Support



ExAdmin supports 2 themes. The new AdminLte2 theme is enabled by default. The old ActiveAdmin theme is also supported for those that want backward compatibility.



### Changing the Theme



To change the theme to ActiveAdmin, at the following to your `config/config.exs` file:



config/config.exs

```elixir

config :ex_admin,

  theme: ExAdmin.Theme.ActiveAdmin,

  ...

```



### Changing the AdminLte2 Skin Color



The AdminLte2 theme has a number of different skin colors including blue, black, purple, green, red, yellow, blue-light, black-light, purple-light, green-light, red-light, and yellow-light



To change the skin color to, for example, purple:



config/config.exs

```elixir

config :ex_admin,

  skin_color: :purple,

  ...

```



### Enable Theme Selector



You can add a theme selector on the top right of the menu bar by adding the following to your `config/config.exs` file:



config/config.exs

```elixir

config :ex_admin,

  theme_selector: [

    {"AdminLte",  ExAdmin.Theme.AdminLte2},

    {"ActiveAdmin", ExAdmin.Theme.ActiveAdmin}

  ],

  ...

```



### Overriding the model name



You can override the name of a model by defining a `model_name/0` function on

the module. This is useful if you want to use a different module for some of

your actions.



admin/my_model.ex

```elixir

def model_name do

  "custom_name"

end

```



## Authentication



ExAdmin leaves the job of authentication to 3rd party packages. For an example of using [Coherence](https://github.com/smpallen99/coherence) checkout the [Contact Demo Project](https://github.com/smpallen99/contact_demo).



Visit the [Wiki](https://github.com/smpallen99/ex_admin/wiki/Add-authentication) for more information on adding Authentication.



## Contributing



We appreciate any contribution to ExAdmin. Check our [CODE_OF_CONDUCT.md](CODE_OF_CONDUCT.md) and [CONTRIBUTING.md](CONTRIBUTING.md) guides for more information. We usually keep a list of features and bugs [in the issue tracker][1].



## References



* Detailed Example [ExAdmin Demo](https://github.com/smpallen99/ex_admin_demo)

* For a brief tutorial, please visit [Elixir Survey Tutorial](https://github.com/smpallen99/elixir_survey_tutorial)

* [Live Demo](http://demo.exadmin.info/admin)

* [Docs](https://hexdocs.pm/ex_admin/)



  [1]: https://github.com/smpallen99/ex_admin/issues

  [2]: http://groups.google.com/group/exadmin-talk



## License



`ex_admin` is Copyright (c) 2015-2016 E-MetroTel



The source code is released under the MIT License.



Check [LICENSE](LICENSE) for more information.