Add CRUD function for Links model.

lib/link_shortener/links.ex

@@ -1,6 +1,9 @@
 defmodule LinkShortener.Links do
   use Ecto.Schema
   import Ecto.Changeset
+  import Ecto.Query
+  alias LinkShortener.Repo
+  alias LinkShortener.Links
 
   schema "links" do
     field :name, :string
@@ -15,4 +18,48 @@ defmodule LinkShortener.Links do
     |> cast(attrs, [:name, :url])
     |> validate_required([:name, :url])
   end
+
+  def new_one(), do: Links.changeset(%Links{})
+
+  def insert_one(attrs) do
+    %Links{}
+    |> Links.changeset(attrs)
+    |> Repo.insert()
+  end
+
+  def edit_one(id) do
+    get_one(id)
+    |> Links.changeset()
+  end
+
+  def update_one(%Links{} = Links, changes) do
+    Links
+    |> Links.changeset(changes)
+    |> Repo.update()
+  end
+
+  def insert_one(attrs) do
+    %Links{}
+    |> Links.changeset(attrs)
+    |> Repo.insert()
+  end
+
+  def delete_one(%Links{} = Links), do: Repo.delete(Links)
+
+  def get_one_by(attrs) do
+    Repo.get_by(Links, attrs)
+  end
+
+  def get_one_by_name(name) do
+    get_one_by(%{name: name})
+  end
+
+  def get_one(id) do
+    Repo.get!(Links, id)
+  end
+
+  def get_all(opts) do
+    from(Links)
+    |> Repo.all()
+  end
 end