Database: add primary key to device_graphs (#11331)

* Database: add primary key to device_graphs

Percona Xtradb refused to INSERT IGNORE into a table
without a primary key.

* Update 2020_03_24_0844_add_primary_key_to_device_graphs.php

* Update db_schema.yaml

Co-authored-by: Tony Murray <murraytony@gmail.com>

database/migrations/2020_03_24_0844_add_primary_key_to_device_graphs.php

@@ -0,0 +1,39 @@
+<?php
+
+/*
+    This migration adds primary key for device_graphs
+
+    Percona Xtradb refused to INSERT IGNORE into a table
+    without a primary key.
+ */
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+
+class AddPrimaryKeyToDeviceGraphs extends Migration
+{
+
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('device_graphs', function (Blueprint $table) {
+            $table->bigIncrements('id');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('device_graphs', function (Blueprint $table) {
+            $table->dropColumn('id');
+        });
+    }
+}

misc/db_schema.yaml

@@ -545,7 +545,9 @@ device_graphs:
   Columns:
     - { Field: device_id, Type: 'int(10) unsigned', 'Null': false, Extra: '' }
     - { Field: graph, Type: varchar(255), 'Null': true, Extra: '' }
+    - { Field: id, Type: 'bigint(20) unsigned', 'Null': false, Extra: auto_increment }
   Indexes:
+    PRIMARY: { Name: PRIMARY, Columns: [id], Unique: true, Type: BTREE }
     device_id: { Name: device_id, Columns: [device_id], Unique: false, Type: BTREE }
 device_groups:
   Columns: