add steps

lib/memex/steps.ex

@@ -0,0 +1,104 @@
+defmodule Memex.Steps do
+  @moduledoc """
+  The Steps context.
+  """
+
+  import Ecto.Query, warn: false
+  alias Memex.Repo
+
+  alias Memex.Steps.Step
+
+  @doc """
+  Returns the list of steps.
+
+  ## Examples
+
+      iex> list_steps()
+      [%Step{}, ...]
+
+  """
+  def list_steps do
+    Repo.all(Step)
+  end
+
+  @doc """
+  Gets a single step.
+
+  Raises `Ecto.NoResultsError` if the Step does not exist.
+
+  ## Examples
+
+      iex> get_step!(123)
+      %Step{}
+
+      iex> get_step!(456)
+      ** (Ecto.NoResultsError)
+
+  """
+  def get_step!(id), do: Repo.get!(Step, id)
+
+  @doc """
+  Creates a step.
+
+  ## Examples
+
+      iex> create_step(%{field: value})
+      {:ok, %Step{}}
+
+      iex> create_step(%{field: bad_value})
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def create_step(attrs \\ %{}) do
+    %Step{}
+    |> Step.changeset(attrs)
+    |> Repo.insert()
+  end
+
+  @doc """
+  Updates a step.
+
+  ## Examples
+
+      iex> update_step(step, %{field: new_value})
+      {:ok, %Step{}}
+
+      iex> update_step(step, %{field: bad_value})
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def update_step(%Step{} = step, attrs) do
+    step
+    |> Step.changeset(attrs)
+    |> Repo.update()
+  end
+
+  @doc """
+  Deletes a step.
+
+  ## Examples
+
+      iex> delete_step(step)
+      {:ok, %Step{}}
+
+      iex> delete_step(step)
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def delete_step(%Step{} = step) do
+    Repo.delete(step)
+  end
+
+  @doc """
+  Returns an `%Ecto.Changeset{}` for tracking step changes.
+
+  ## Examples
+
+      iex> change_step(step)
+      %Ecto.Changeset{data: %Step{}}
+
+  """
+  def change_step(%Step{} = step, attrs \\ %{}) do
+    Step.changeset(step, attrs)
+  end
+end

lib/memex/steps/step.ex

@@ -0,0 +1,22 @@
+defmodule Memex.Steps.Step do
+  use Ecto.Schema
+  import Ecto.Changeset
+
+  @primary_key {:id, :binary_id, autogenerate: true}
+  @foreign_key_type :binary_id
+  schema "steps" do
+    field :description, :string
+    field :position, :integer
+    field :title, :string
+    field :pipeline_id, :binary_id
+
+    timestamps()
+  end
+
+  @doc false
+  def changeset(step, attrs) do
+    step
+    |> cast(attrs, [:title, :description, :position])
+    |> validate_required([:title, :description, :position])
+  end
+end