WIP for #432

- Also noted agreed standard for file naming extensions to migrations 
file

migrations/012.community.down.sql

@@ -0,0 +1,13 @@
+-- Remove community fields
+
+-- Ownership type, enumerate type from:
+ALTER TABLE buildings DROP COLUMN IF EXISTS ownership_type;
+
+-- Ownerhsip perception, would you describe this as a community asset?
+-- Boolean yes / no
+ALTER TABLE buildings DROP COLUMN IF EXISTS ownership_perception;
+
+-- Historic ownership type / perception
+-- Has this building ever been used for community or public services activities?
+-- Boolean yes / no
+ALTER TABLE buildings DROP COLUMN IF EXISTS ownership_historic;

migrations/012.community.up.sql

@@ -0,0 +1,28 @@
+-- Remove community fields
+
+-- Ownership type, enumerate type from:
+--
+
+CREATE TYPE ownership_type
+AS ENUM ('Private individual',
+    'Private company',
+    'Private offshore ownership',
+    'Publicly owned',
+    'Institutionally owned');
+
+ALTER TABLE buildings
+    ADD COLUMN IF NOT EXISTS ownership_type ownership_type DEFAULT 'Private individual';
+
+-- Ownerhsip perception, would you describe this as a community asset?
+-- Boolean yes / no
+-- Below accepts t/f, yes/no, y/n, 0/1 as valid inputs all of which
+
+ALTER TABLE buildings
+    ADD COLUMN IF NOT EXISTS ownership_perception boolean DEFAULT null;
+
+-- Historic ownership type / perception
+-- Has this building ever been used for community or public services activities?
+-- Boolean yes / no
+
+ALTER TABLE buildings
+    ADD COLUMN IF NOT EXISTS ownership_historic boolean DEFAULT null;

migrations/README.md

@@ -53,3 +53,7 @@ Set or update passwords:
 ```bash
 psql -c "ALTER USER appusername WITH PASSWORD 'longsecurerandompassword';"
 ```
+
+Syntax for adding to existing migration:
+
+`0##.filename-extension-#.up.sql`