Masters and Transaction changes

database/migrations/2025_03_20_125247_create_shifts_table.php

@@ -0,0 +1,45 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        $sql = <<<'SQL'
+            CREATE TABLE shifts (
+                id              BIGINT GENERATED always AS IDENTITY PRIMARY KEY,
+
+                name            CITEXT NOT NULL,
+                block_id        BIGINT NOT NULL,
+                plant_id        BIGINT NOT NULL,
+
+                start_time      TIME NOT NULL,
+                duration        DECIMAL NOT NULL,
+                end_time        TIME NOT NULL, --GENERATED ALWAYS AS (start_time + (duration * INTERVAL '1 hour')) STORED,
+
+                created_at      TIMESTAMP NOT NULL DEFAULT NOW(),
+                updated_at      TIMESTAMP NOT NULL DEFAULT NOW(),
+                deleted_at      TIMESTAMP,
+
+                UNIQUE (name, block_id, plant_id),
+                FOREIGN KEY (block_id) REFERENCES blocks (id),
+                FOREIGN KEY (plant_id) REFERENCES plants (id)
+            );
+        SQL;
+
+        DB::statement($sql);
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('shifts');
+    }
+};