use dynamic dispatch

lib/memex/contexts/context.ex

@@ -3,11 +3,8 @@ defmodule Memex.Contexts.Context do
   Represents a document that synthesizes multiple concepts as defined by notes
   into a single consideration
   """
-  use Ecto.Schema
-  use Gettext, backend: MemexWeb.Gettext
-  import Ecto.Changeset
-  alias Ecto.{Changeset, UUID}
-  alias Memex.{Accounts.User, Repo}
+
+  use Memex, :schema
 
   @derive {Phoenix.Param, key: :slug}
   @derive {Jason.Encoder,
@@ -19,8 +16,6 @@ defmodule Memex.Contexts.Context do
              :inserted_at,
              :updated_at
            ]}
-  @primary_key {:id, :binary_id, autogenerate: true}
-  @foreign_key_type :binary_id
   schema "contexts" do
     field :slug, :string
     field :content, :string
@@ -59,7 +54,7 @@ defmodule Memex.Contexts.Context do
     )
     |> validate_required([:slug, :user_id, :visibility])
     |> unique_constraint(:slug)
-    |> unsafe_validate_unique(:slug, Repo)
+    |> unsafe_validate_unique(:slug, Memex.Repo)
   end
 
   @spec update_changeset(t(), attrs :: map(), User.t()) :: changeset()
@@ -73,7 +68,7 @@ defmodule Memex.Contexts.Context do
     )
     |> validate_required([:slug, :visibility])
     |> unique_constraint(:slug)
-    |> unsafe_validate_unique(:slug, Repo)
+    |> unsafe_validate_unique(:slug, Memex.Repo)
   end
 
   defp cast_tags_string(changeset, attrs) do