Introduce new model for future remodeling of split transactions.

database/migrations/2018_06_08_200526_changes_for_v475.php

@@ -71,10 +71,6 @@ class ChangesForV475 extends Migration
             $table->boolean('apply_rules')->default(true);
             $table->boolean('active')->default(true);
 
-            // also separate:
-            // category, budget, tags, notes, bill, piggy bank
-
-
             $table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
             $table->foreign('transaction_type_id')->references('id')->on('transaction_types')->onDelete('cascade');
         }

database/migrations/2019_01_28_193833_changes_for_v4710.php

@@ -0,0 +1,60 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class ChangesForV4710 extends Migration
+{
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('group_journals');
+        Schema::dropIfExists('transaction_groups');
+    }
+
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        if (!Schema::hasTable('transaction_groups')) {
+            Schema::create(
+                'transaction_groups', function (Blueprint $table) {
+                $table->increments('id');
+                $table->timestamps();
+                $table->softDeletes();
+                $table->integer('user_id', false, true);
+                $table->string('title', 1024)->nullable();
+
+
+                $table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
+            }
+            );
+        }
+
+        if (!Schema::hasTable('group_journals')) {
+            Schema::create(
+                'group_journals',
+                function (Blueprint $table) {
+                    $table->increments('id');
+                    $table->integer('transaction_group_id', false, true);
+                    $table->integer('transaction_journal_id', false, true);
+
+                    $table->foreign('transaction_group_id')->references('id')->on('transaction_groups')->onDelete('cascade');
+                    $table->foreign('transaction_journal_id')->references('id')->on('transaction_journals')->onDelete('cascade');
+
+                    // unique combi:
+                    $table->unique(['transaction_group_id', 'transaction_journal_id'],'unique_in_group');
+                }
+            );
+        }
+
+    }
+}