use dynamic dispatch

lib/memex/accounts/invite.ex

@@ -5,13 +5,8 @@ defmodule Memex.Accounts.Invite do
   `:uses_left` is defined.
   """
 
-  use Ecto.Schema
-  import Ecto.Changeset
-  alias Ecto.{Association, Changeset, UUID}
-  alias Memex.Accounts.User
+  use Memex, :schema
 
-  @primary_key {:id, :binary_id, autogenerate: true}
-  @foreign_key_type :binary_id
   schema "invites" do
     field :name, :string
     field :token, :string

lib/memex/accounts/invites.ex

@@ -3,10 +3,8 @@ defmodule Memex.Accounts.Invites do
   The Invites context.
   """
 
-  import Ecto.Query, warn: false
-  alias Ecto.Multi
-  alias Memex.Accounts.{Invite, User}
-  alias Memex.Repo
+  use Memex, :context
+  alias Memex.Accounts.Invite
 
   @invite_token_length 20
 

lib/memex/accounts/user.ex

@@ -3,11 +3,8 @@ defmodule Memex.Accounts.User do
   A Memex user
   """
 
-  use Ecto.Schema
-  use Gettext, backend: MemexWeb.Gettext
-  import Ecto.Changeset
-  alias Ecto.{Association, Changeset, UUID}
-  alias Memex.Accounts.{Invite, User}
+  use Memex, :schema
+  alias Memex.Accounts.Invite
 
   @derive {Jason.Encoder,
            only: [
@@ -20,8 +17,6 @@ defmodule Memex.Accounts.User do
              :updated_at
            ]}
   @derive {Inspect, except: [:password]}
-  @primary_key {:id, :binary_id, autogenerate: true}
-  @foreign_key_type :binary_id
   schema "users" do
     field :email, :string
     field :password, :string, virtual: true

lib/memex/accounts/user_token.ex

@@ -3,10 +3,7 @@ defmodule Memex.Accounts.UserToken do
   Schema for a user's session token
   """
 
-  use Ecto.Schema
-  import Ecto.Query
-  alias Ecto.{Association, UUID}
-  alias Memex.Accounts.User
+  use Memex, :schema
 
   @hash_algorithm :sha256
   @rand_size 32
@@ -18,8 +15,6 @@ defmodule Memex.Accounts.UserToken do
   @change_email_validity_in_days 7
   @session_validity_in_days 60
 
-  @primary_key {:id, :binary_id, autogenerate: true}
-  @foreign_key_type :binary_id
   schema "users_tokens" do
     field :token, :binary
     field :context, :string