Some new code for CSV.

app/Models/TransactionJournal.php

@@ -216,7 +216,7 @@ class TransactionJournal extends TransactionJournalSupport
      *
      * @return string
      */
-    public function getMeta($fieldName): string
+    public function getMeta($fieldName)
     {
         foreach ($this->transactionjournalmeta as $meta) {
             if ($meta->name == $fieldName) {

app/Models/TransactionJournalMeta.php

@@ -31,14 +31,36 @@ use Illuminate\Database\Eloquent\Relations\BelongsTo;
  * @method static \Illuminate\Database\Query\Builder|\FireflyIII\Models\TransactionJournalMeta whereName($value)
  * @method static \Illuminate\Database\Query\Builder|\FireflyIII\Models\TransactionJournalMeta whereData($value)
  * @mixin \Eloquent
+ * @property string $hash
+ * @method static \Illuminate\Database\Query\Builder|\FireflyIII\Models\TransactionJournalMeta whereHash($value)
  */
 class TransactionJournalMeta extends Model
 {
 
     protected $dates    = ['created_at', 'updated_at'];
-    protected $fillable = ['transaction_journal_id', 'name', 'data'];
+    protected $fillable = ['transaction_journal_id', 'name', 'data','hash'];
     protected $table    = 'journal_meta';
 
+    /**
+     * @param $value
+     *
+     * @return mixed
+     */
+    public function getDataAttribute($value)
+    {
+        return json_decode($value);
+    }
+
+    /**
+     * @param $value
+     */
+    public function setDataAttribute($value)
+    {
+        $data                     = json_encode($value);
+        $this->attributes['data'] = $data;
+        $this->attributes['hash'] = hash('sha256', $data);
+    }
+
     /**
      *
      * @return \Illuminate\Database\Eloquent\Relations\BelongsTo

database/migrations/2016_04_08_181054_changes_for_v383.php

@@ -0,0 +1,36 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+
+
+/**
+ * Class ChangesForV383
+ */
+class ChangesForV383 extends Migration
+{
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        //
+    }
+
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        // extend journal meta
+        Schema::table(
+            'journal_meta', function (Blueprint $table) {
+            $table->string('hash', 64)->nullable();
+        }
+        );
+    }
+}