context: roles

lib/philomena/roles.ex

@@ -0,0 +1,104 @@
+defmodule Philomena.Roles do
+  @moduledoc """
+  The Roles context.
+  """
+
+  import Ecto.Query, warn: false
+  alias Philomena.Repo
+
+  alias Philomena.Roles.Role
+
+  @doc """
+  Returns the list of roles.
+
+  ## Examples
+
+      iex> list_roles()
+      [%Role{}, ...]
+
+  """
+  def list_roles do
+    Repo.all(Role)
+  end
+
+  @doc """
+  Gets a single role.
+
+  Raises `Ecto.NoResultsError` if the Role does not exist.
+
+  ## Examples
+
+      iex> get_role!(123)
+      %Role{}
+
+      iex> get_role!(456)
+      ** (Ecto.NoResultsError)
+
+  """
+  def get_role!(id), do: Repo.get!(Role, id)
+
+  @doc """
+  Creates a role.
+
+  ## Examples
+
+      iex> create_role(%{field: value})
+      {:ok, %Role{}}
+
+      iex> create_role(%{field: bad_value})
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def create_role(attrs \\ %{}) do
+    %Role{}
+    |> Role.changeset(attrs)
+    |> Repo.insert()
+  end
+
+  @doc """
+  Updates a role.
+
+  ## Examples
+
+      iex> update_role(role, %{field: new_value})
+      {:ok, %Role{}}
+
+      iex> update_role(role, %{field: bad_value})
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def update_role(%Role{} = role, attrs) do
+    role
+    |> Role.changeset(attrs)
+    |> Repo.update()
+  end
+
+  @doc """
+  Deletes a Role.
+
+  ## Examples
+
+      iex> delete_role(role)
+      {:ok, %Role{}}
+
+      iex> delete_role(role)
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def delete_role(%Role{} = role) do
+    Repo.delete(role)
+  end
+
+  @doc """
+  Returns an `%Ecto.Changeset{}` for tracking role changes.
+
+  ## Examples
+
+      iex> change_role(role)
+      %Ecto.Changeset{source: %Role{}}
+
+  """
+  def change_role(%Role{} = role) do
+    Role.changeset(role, %{})
+  end
+end

lib/philomena/roles/role.ex

@@ -0,0 +1,21 @@
+defmodule Philomena.Roles.Role do
+  use Ecto.Schema
+  import Ecto.Changeset
+
+  schema "roles" do
+    field :name, :string
+
+    # fixme: rails polymorphic relation
+    field :resource_id, :integer
+    field :resource_type, :string
+
+    timestamps(inserted_at: :created_at)
+  end
+
+  @doc false
+  def changeset(role, attrs) do
+    role
+    |> cast(attrs, [])
+    |> validate_required([])
+  end
+end

test/philomena/roles_test.exs

@@ -0,0 +1,62 @@
+defmodule Philomena.RolesTest do
+  use Philomena.DataCase
+
+  alias Philomena.Roles
+
+  describe "roles" do
+    alias Philomena.Roles.Role
+
+    @valid_attrs %{}
+    @update_attrs %{}
+    @invalid_attrs %{}
+
+    def role_fixture(attrs \\ %{}) do
+      {:ok, role} =
+        attrs
+        |> Enum.into(@valid_attrs)
+        |> Roles.create_role()
+
+      role
+    end
+
+    test "list_roles/0 returns all roles" do
+      role = role_fixture()
+      assert Roles.list_roles() == [role]
+    end
+
+    test "get_role!/1 returns the role with given id" do
+      role = role_fixture()
+      assert Roles.get_role!(role.id) == role
+    end
+
+    test "create_role/1 with valid data creates a role" do
+      assert {:ok, %Role{} = role} = Roles.create_role(@valid_attrs)
+    end
+
+    test "create_role/1 with invalid data returns error changeset" do
+      assert {:error, %Ecto.Changeset{}} = Roles.create_role(@invalid_attrs)
+    end
+
+    test "update_role/2 with valid data updates the role" do
+      role = role_fixture()
+      assert {:ok, %Role{} = role} = Roles.update_role(role, @update_attrs)
+    end
+
+    test "update_role/2 with invalid data returns error changeset" do
+      role = role_fixture()
+      assert {:error, %Ecto.Changeset{}} = Roles.update_role(role, @invalid_attrs)
+      assert role == Roles.get_role!(role.id)
+    end
+
+    test "delete_role/1 deletes the role" do
+      role = role_fixture()
+      assert {:ok, %Role{}} = Roles.delete_role(role)
+      assert_raise Ecto.NoResultsError, fn -> Roles.get_role!(role.id) end
+    end
+
+    test "change_role/1 returns a role changeset" do
+      role = role_fixture()
+      assert %Ecto.Changeset{} = Roles.change_role(role)
+    end
+  end
+end