fix and merge migration

Author: isoppp

db/migrations/000001_init_schema.down.sql

@@ -1,4 +1,5 @@
 DROP TABLE IF EXISTS posts;
 DROP TABLE IF EXISTS user_role;
 DROP TABLE IF EXISTS roles;
+DROP TABLE IF EXISTS sessions;
 DROP TABLE IF EXISTS users;

db/migrations/000001_init_schema.up.sql

@@ -3,34 +3,45 @@ CREATE TABLE "users"
     "id"              SERIAL PRIMARY KEY,
     "email"           varchar UNIQUE NOT NULL,
     "hashed_password" varchar        NOT NULL,
-    "created_at"      timestamptz     NOT NULL DEFAULT (now()),
-    "updated_at"      timestamptz     NOT NULL DEFAULT (now())
+    "created_at"      timestamptz    NOT NULL DEFAULT (now()),
+    "updated_at"      timestamptz    NOT NULL DEFAULT (now())
+);
+
+CREATE TABLE "sessions"
+(
+    "id"         uuid PRIMARY KEY NOT NULL,
+    "user_id"    int              NOT NULL,
+    "expires_at" timestamp        NOT NULL,
+    "created_at" timestamptz      NOT NULL DEFAULT (now())
 );
 
 CREATE TABLE "roles"
 (
     "id"         SERIAL PRIMARY KEY,
     "name"       varchar UNIQUE NOT NULL,
-    "created_at" timestamptz     NOT NULL DEFAULT (now()),
-    "updated_at" timestamptz     NOT NULL DEFAULT (now())
+    "created_at" timestamptz    NOT NULL DEFAULT (now()),
+    "updated_at" timestamptz    NOT NULL DEFAULT (now())
 );
 
 CREATE TABLE "user_role"
 (
-    "id"      SERIAL PRIMARY KEY,
     "user_id" int NOT NULL,
-    "role_id" int NOT NULL
+    "role_id" int NOT NULL,
+    PRIMARY KEY ("user_id", "role_id")
 );
 
 CREATE TABLE "posts"
 (
     "id"         SERIAL PRIMARY KEY,
-    "content"    text       NOT NULL,
+    "content"    text        NOT NULL,
     "created_at" timestamptz NOT NULL DEFAULT (now()),
     "updated_at" timestamptz NOT NULL DEFAULT (now()),
-    "user_id"    int        NOT NULL
+    "user_id"    int         NOT NULL
 );
 
+ALTER TABLE "sessions"
+    ADD FOREIGN KEY ("user_id") REFERENCES "users" ("id");
+
 ALTER TABLE "user_role"
     ADD FOREIGN KEY ("user_id") REFERENCES "users" ("id");
 
@@ -40,7 +51,9 @@ ALTER TABLE "user_role"
 ALTER TABLE "posts"
     ADD FOREIGN KEY ("user_id") REFERENCES "users" ("id");
 
-CREATE UNIQUE INDEX ON "user_role" ("user_id", "role_id");
+CREATE INDEX ON "users" ("created_at");
+
+CREATE INDEX ON "sessions" ("expires_at");
 
 CREATE INDEX ON "posts" ("created_at");