Add supplier linking

database/migrations/2022_08_06_140410_supplier_constraint.php

@@ -0,0 +1,46 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+		Schema::table('supplier_details', function (Blueprint $table) {
+			$table->foreign(['supplier_id'])->references(['id'])->on('suppliers');
+		});
+
+		Schema::create('supplier_user', function (Blueprint $table) {
+			$table->integer('site_id')->unsigned();
+			$table->integer('supplier_id')->unsigned();
+			$table->integer('user_id')->unsigned();
+			$table->string('id');
+			$table->dateTime('created_at');
+
+			$table->unique(['supplier_id','user_id']);
+			$table->foreign(['supplier_id'])->references(['id'])->on('suppliers');
+			$table->foreign(['user_id','site_id'])->references(['id','site_id'])->on('users');
+		});
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+		Schema::table('supplier_details', function (Blueprint $table) {
+			$table->dropForeign(['supplier_id']);
+		});
+
+		Schema::dropIfExists('supplier_user');
+    }
+};