From adfe1696ee2960122769b9fbf68974fb69d1da7a Mon Sep 17 00:00:00 2001
From: Leif Metcalf <me@leif.nz>
Date: Tue, 21 Jan 2025 14:25:00 +1300
Subject: [PATCH] Use change instead of up/down

---
 README.md | 24 ++++++------------------
 1 file changed, 6 insertions(+), 18 deletions(-)

diff --git a/README.md b/README.md
index e110d45..e1d17c5 100644
--- a/README.md
+++ b/README.md
@@ -97,16 +97,12 @@ end
 defmodule Repo.Migrations.Init do
   use Ecto.Migration
 
-  def up do
+  def change do
     create table(:test) do
       add :name,     :string
       add :geom,     :geometry
     end
   end
-
-  def down do
-    drop table(:test)
-  end
 end
 ```
 
@@ -116,21 +112,17 @@ Ecto migrations can also use more elaborate [PostGIS GIS Objects](http://postgis
 defmodule Repo.Migrations.AdvancedInit do
   use Ecto.Migration
 
-  def up do
+  def change do
     create table(:test) do
       add :name,     :string
     end
     # Add a field `lng_lat_point` with type `geometry(Point,4326)`.
     # This can store a "standard GPS" (epsg4326) coordinate pair {longitude,latitude}.
-    execute("SELECT AddGeometryColumn ('test','lng_lat_point',4326,'POINT',2);")
+    execute("SELECT AddGeometryColumn ('test','lng_lat_point',4326,'POINT',2);", "")
 
     # Once a GIS data table exceeds a few thousand rows, you will want to build an index to speed up spatial searches of the data
     # Syntax - CREATE INDEX [indexname] ON [tablename] USING GIST ( [geometryfield] );
-    execute("CREATE INDEX test_geom_idx ON test USING GIST (lng_lat_point);")
-  end
-
-  def down do
-    drop table(:test)
+    execute("CREATE INDEX test_geom_idx ON test USING GIST (lng_lat_point);", "")
   end
 end
 ```
@@ -141,12 +133,8 @@ Be sure to enable the PostGIS extension if you haven't already done so:
 defmodule MyApp.Repo.Migrations.EnablePostgis do
   use Ecto.Migration
 
-  def up do
-    execute "CREATE EXTENSION IF NOT EXISTS postgis"
-  end
-
-  def down do
-    execute "DROP EXTENSION IF EXISTS postgis"
+  def change do
+    execute "CREATE EXTENSION IF NOT EXISTS postgis", "DROP EXTENSION IF EXISTS postgis"
   end
 end
 ```