Setup diesel for database backend implementation

Signed-off-by: Matthias Beyer <mail@beyermatthias.de>

8 files changed, 88 insertions, 0 deletions

diff --git a/service-person/.gitignore b/service-person/.gitignore
new file mode 100644
index 0000000..0bd66fb
--- /dev/null
+++ b/service-person/.gitignore
@@ -0,0 +1 @@
+src/schema.rs
diff --git a/service-person/Cargo.toml b/service-person/Cargo.toml
index e38b505..c78dfb8 100644
--- a/service-person/Cargo.toml
+++ b/service-person/Cargo.toml
@@ -9,3 +9,4 @@ env_logger = "0.8"
 actix-web  = "3.3"
 anyhow = "1"
 serde = "1"
+diesel = { version = "1.4.4", features = ["postgres"] }
diff --git a/service-person/diesel.toml b/service-person/diesel.toml
new file mode 100644
index 0000000..92267c8
--- /dev/null
+++ b/service-person/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/schema.rs"
diff --git a/service-person/migrations/.gitkeep b/service-person/migrations/.gitkeep
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/service-person/migrations/.gitkeep
diff --git a/service-person/migrations/00000000000000_diesel_initial_setup/down.sql b/service-person/migrations/00000000000000_diesel_initial_setup/down.sql
new file mode 100644
index 0000000..a9f5260
--- /dev/null
+++ b/service-person/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/service-person/migrations/00000000000000_diesel_initial_setup/up.sql b/service-person/migrations/00000000000000_diesel_initial_setup/up.sql
new file mode 100644
index 0000000..d68895b
--- /dev/null
+++ b/service-person/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;
diff --git a/service-person/migrations/2021-10-22-182006_create_initial_tables/down.sql b/service-person/migrations/2021-10-22-182006_create_initial_tables/down.sql
new file mode 100644
index 0000000..d57d59a
--- /dev/null
+++ b/service-person/migrations/2021-10-22-182006_create_initial_tables/down.sql
@@ -0,0 +1,5 @@
+-- This file should undo anything in `up.sql`
+DROP TABLE persons;
+DROP TABLE address;
+DROP TABLE cities;
+DROP TABLE countries;
diff --git a/service-person/migrations/2021-10-22-182006_create_initial_tables/up.sql b/service-person/migrations/2021-10-22-182006_create_initial_tables/up.sql
new file mode 100644
index 0000000..24a214f
--- /dev/null
+++ b/service-person/migrations/2021-10-22-182006_create_initial_tables/up.sql
@@ -0,0 +1,34 @@
+-- Your SQL goes here
+
+CREATE TABLE countries (
+    id SERIAL PRIMARY KEY NOT NULL,
+    name VARCHAR NOT NULL
+);
+
+CREATE TABLE cities (
+    id SERIAL PRIMARY KEY NOT NULL,
+    name VARCHAR NOT NULL
+);
+
+CREATE TABLE streets (
+    id SERIAL PRIMARY KEY NOT NULL,
+    name VARCHAR NOT NULL
+);
+
+CREATE TABLE address (
+    id SERIAL PRIMARY KEY NOT NULL,
+
+    country_id INTEGER REFERENCES countries(id) NOT NULL,
+    city_id INTEGER REFERENCES cities(id) NOT NULL,
+    street_id INTEGER REFERENCES streets(id) NOT NULL,
+
+    addr_number INTEGER NOT NULL
+);
+
+CREATE TABLE persons (
+    id SERIAL PRIMARY KEY NOT NULL,
+    name VARCHAR NOT NULL,
+    age INTEGER NOT NULL,
+
+    address_id INTEGER REFERENCES address(id) NOT NULL
+);