From c0db4991c34383d281d1a270e6a20eb8998ce807 Mon Sep 17 00:00:00 2001
From: Jef Roosens <roosensjef@gmail.com>
Date: Thu, 19 Aug 2021 22:39:14 +0200
Subject: [PATCH] Set up Diesel

---
 .env                                          |  2 ++
 diesel.toml                                   |  5 +++
 docker-compose.yml                            | 19 ++++++++++
 migrations/.gitkeep                           |  0
 .../down.sql                                  |  6 ++++
 .../up.sql                                    | 36 +++++++++++++++++++
 6 files changed, 68 insertions(+)
 create mode 100644 .env
 create mode 100644 diesel.toml
 create mode 100644 docker-compose.yml
 create mode 100644 migrations/.gitkeep
 create mode 100644 migrations/00000000000000_diesel_initial_setup/down.sql
 create mode 100644 migrations/00000000000000_diesel_initial_setup/up.sql

diff --git a/.env b/.env
new file mode 100644
index 0000000..9cacc63
--- /dev/null
+++ b/.env
@@ -0,0 +1,2 @@
+# This file is used by diesel to find the development database
+DATABASE_URL=postgres://rb:rb@localhost/rb
diff --git a/diesel.toml b/diesel.toml
new file mode 100644
index 0000000..332da6a
--- /dev/null
+++ b/diesel.toml
@@ -0,0 +1,5 @@
+# For documentation on how to configure this file,
+# see diesel.rs/guides/configuring-diesel-cli
+
+[print_schema]
+file = "src/rb/schema.rs"
diff --git a/docker-compose.yml b/docker-compose.yml
new file mode 100644
index 0000000..522fe33
--- /dev/null
+++ b/docker-compose.yml
@@ -0,0 +1,19 @@
+# I just use this compose file to easily start up test databases
+version: '3'
+
+services:
+  db:
+    image: 'postgres:13-alpine'
+    restart: 'always'
+
+    environment:
+      - 'POSTGRES_DB=rb'
+      - 'POSTGRES_USER=rb'
+      - 'POSTGRES_PASSWORD=rb'
+    ports:
+      - '5432:5432'
+    volumes:
+      - 'db-data:/var/lib/postgresql/data'
+
+volumes:
+  db-data:
diff --git a/migrations/.gitkeep b/migrations/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/migrations/00000000000000_diesel_initial_setup/down.sql b/migrations/00000000000000_diesel_initial_setup/down.sql
new file mode 100644
index 0000000..a9f5260
--- /dev/null
+++ b/migrations/00000000000000_diesel_initial_setup/down.sql
@@ -0,0 +1,6 @@
+-- This file was automatically created by Diesel to setup helper functions
+-- and other internal bookkeeping. This file is safe to edit, any future
+-- changes will be added to existing projects as new migrations.
+
+DROP FUNCTION IF EXISTS diesel_manage_updated_at(_tbl regclass);
+DROP FUNCTION IF EXISTS diesel_set_updated_at();
diff --git a/migrations/00000000000000_diesel_initial_setup/up.sql b/migrations/00000000000000_diesel_initial_setup/up.sql
new file mode 100644
index 0000000..d68895b
--- /dev/null
+++ b/migrations/00000000000000_diesel_initial_setup/up.sql
@@ -0,0 +1,36 @@
+-- This file was automatically created by Diesel to setup helper functions
+-- and other internal bookkeeping. This file is safe to edit, any future
+-- changes will be added to existing projects as new migrations.
+
+
+
+
+-- Sets up a trigger for the given table to automatically set a column called
+-- `updated_at` whenever the row is modified (unless `updated_at` was included
+-- in the modified columns)
+--
+-- # Example
+--
+-- ```sql
+-- CREATE TABLE users (id SERIAL PRIMARY KEY, updated_at TIMESTAMP NOT NULL DEFAULT NOW());
+--
+-- SELECT diesel_manage_updated_at('users');
+-- ```
+CREATE OR REPLACE FUNCTION diesel_manage_updated_at(_tbl regclass) RETURNS VOID AS $$
+BEGIN
+    EXECUTE format('CREATE TRIGGER set_updated_at BEFORE UPDATE ON %s
+                    FOR EACH ROW EXECUTE PROCEDURE diesel_set_updated_at()', _tbl);
+END;
+$$ LANGUAGE plpgsql;
+
+CREATE OR REPLACE FUNCTION diesel_set_updated_at() RETURNS trigger AS $$
+BEGIN
+    IF (
+        NEW IS DISTINCT FROM OLD AND
+        NEW.updated_at IS NOT DISTINCT FROM OLD.updated_at
+    ) THEN
+        NEW.updated_at := current_timestamp;
+    END IF;
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;