wundergraph_example supports mysql

Author: Alexei Pastuchov

wundergraph_example/Cargo.toml

@@ -6,7 +6,7 @@ license = "MIT OR Apache-2.0"
 publish = false
 repository = "https://github.com/weiznich/wundergraph"
 readme = "../README.md"
-keywords = ["GraphQL", "ORM", "PostgreSQL", "SQLite"]
+keywords = ["GraphQL", "ORM", "PostgreSQL", "SQLite", "Mysql"]
 categories = ["database", "web-programming"]
 description = "A GraphQL ORM build on top of diesel"
 edition = "2018"
@@ -31,3 +31,4 @@ default-features = false
 default = ["postgres", "wundergraph/debug"]
 sqlite = ["wundergraph/sqlite", "diesel/sqlite"]
 postgres = ["wundergraph/postgres", "diesel/postgres"]
+mysql = ["wundergraph/mysql", "diesel/mysql"]

wundergraph_example/migrations/mysql/2018-01-24-131925_setup/down.sql

@@ -0,0 +1,7 @@
+-- This file should undo anything in `up.sql`
+
+DROP TABLE friends;
+DROP TABLE appears_in;
+DROP TABLE heros;
+DROP TABLE home_worlds;
+DROP TABLE species;

wundergraph_example/migrations/mysql/2018-01-24-131925_setup/up.sql

@@ -0,0 +1,52 @@
+CREATE TABLE species(
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    name TEXT NOT NULL
+);
+
+CREATE TABLE home_worlds(
+   id INT AUTO_INCREMENT PRIMARY KEY,
+   name TEXT NOT NULL
+);
+
+CREATE TABLE heros(
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    name TEXT NOT NULL,
+    hair_color TEXT,
+    species INTEGER NOT NULL REFERENCES species(id) ON DELETE CASCADE ON UPDATE RESTRICT,
+    home_world INTEGER REFERENCES home_worlds(id) ON DELETE CASCADE ON UPDATE RESTRICT
+);
+
+CREATE TABLE appears_in(
+    hero_id INTEGER NOT NULL REFERENCES heros(id) ON DELETE CASCADE ON UPDATE RESTRICT,
+    episode SMALLINT NOT NULL CHECK(episode IN (1,2,3)),
+    PRIMARY KEY(hero_id, episode)
+);
+
+CREATE TABLE friends(
+    hero_id INTEGER NOT NULL REFERENCES heros(id) ON DELETE CASCADE ON UPDATE RESTRICT,
+    friend_id INTEGER NOT NULL REFERENCES heros(id) ON DELETE CASCADE ON UPDATE RESTRICT,
+    PRIMARY KEY(hero_id, friend_id)
+);
+
+INSERT INTO species(id, name) VALUES (1, 'Human'), (2, 'Robot');
+
+INSERT INTO home_worlds(id, name) VALUES(1, 'Tatooine'), (2, 'Alderaan');
+
+INSERT INTO heros(id, name, species, home_world, hair_color)
+    VALUES (1, 'Luke Skywalker', 1, 1, 'blond'),
+           (2, 'Darth Vader', 1, 1, DEFAULT),
+           (3, 'Han Solo', 1, Null, DEFAULT),
+           (4, 'Leia Organa', 1, 2, DEFAULT),
+           (5, 'Wilhuff Tarkin', 1, Null, DEFAULT);
+
+INSERT INTO appears_in(hero_id, episode)
+    VALUES (1, 1), (1, 2), (1, 3),
+           (2, 1), (2, 2), (2, 3),
+           (3, 1), (3, 2), (3, 3),
+           (4, 1), (4, 2), (4, 3),
+           (5, 3);
+
+
+INSERT INTO friends(hero_id, friend_id)
+    VALUES (1, 3), (1, 4), (2, 5), (3, 1),
+           (3, 4), (4, 1), (4, 3), (5, 2);

wundergraph_example/src/bin/main.rs

@@ -83,6 +83,8 @@ fn run_migrations(conn: &DBConnection) {
         migration_path.push("pg");
     } else if cfg!(feature = "sqlite") {
         migration_path.push("sqlite");
+    } else if cfg!(feature = "mysql") {
+        migration_path.push("mysql");
     }
     let pending_migrations =
         ::diesel_migrations::mark_migrations_in_directory(conn, &migration_path)

wundergraph_example/src/lib.rs

@@ -261,6 +261,9 @@ pub type DBConnection = ::diesel::PgConnection;
 #[cfg(feature = "sqlite")]
 pub type DBConnection = ::diesel::SqliteConnection;
 
+#[cfg(feature = "mysql")]
+pub type DBConnection = ::diesel::mysql::MysqlConnection;
+
 pub type DbBackend = <DBConnection as Connection>::Backend;
 
 pub type Schema<Ctx> =