Added 'dbType' => 'longtext' for text fields

application/Espo/Core/Utils/Database/DBAL/FieldTypes/JsonArrayType.php

@@ -29,7 +29,7 @@
 
 namespace Espo\Core\Utils\Database\DBAL\FieldTypes;
 
-class JsonArrayType extends \Doctrine\DBAL\Types\TextType
+class JsonArrayType extends TextType
 {
     const JSON_ARRAY = 'jsonArray';
 
@@ -37,10 +37,4 @@ class JsonArrayType extends \Doctrine\DBAL\Types\TextType
     {
         return self::JSON_ARRAY;
     }
-
-    public static function getDbTypeName()
-    {
-        return 'TEXT';
-    }
-
 }

application/Espo/Core/Utils/Database/DBAL/FieldTypes/JsonObjectType.php

@@ -29,7 +29,7 @@
 
 namespace Espo\Core\Utils\Database\DBAL\FieldTypes;
 
-class JsonObjectType extends \Doctrine\DBAL\Types\TextType
+class JsonObjectType extends TextType
 {
     const JSON_OBJECT = 'jsonObject';
 
@@ -37,10 +37,4 @@ class JsonObjectType extends \Doctrine\DBAL\Types\TextType
     {
         return self::JSON_OBJECT;
     }
-
-    public static function getDbTypeName()
-    {
-        return 'TEXT';
-    }
-
 }

application/Espo/Core/Utils/Database/DBAL/FieldTypes/LongtextType.php

@@ -0,0 +1,52 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM - Open Source CRM application.
+ * Copyright (C) 2014-2020 Yuri Kuznetsov, Taras Machyshyn, Oleksiy Avramenko
+ * Website: https://www.espocrm.com
+ *
+ * EspoCRM is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * EspoCRM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with EspoCRM. If not, see http://www.gnu.org/licenses/.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Core\Utils\Database\DBAL\FieldTypes;
+
+use Doctrine\DBAL\Platforms\AbstractPlatform;
+
+class LongtextType extends TextType
+{
+    const LONGTEXT = 'longtext';
+
+    public function getName()
+    {
+        return self::LONGTEXT;
+    }
+
+    public static function getDbTypeName()
+    {
+        return 'longtext';
+    }
+
+    public function getSQLDeclaration(array $fieldDeclaration, AbstractPlatform $platform)
+    {
+        return 'LONGTEXT';
+    }
+}

application/Espo/Core/Utils/Database/DBAL/FieldTypes/TextType.php

@@ -0,0 +1,45 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM - Open Source CRM application.
+ * Copyright (C) 2014-2020 Yuri Kuznetsov, Taras Machyshyn, Oleksiy Avramenko
+ * Website: https://www.espocrm.com
+ *
+ * EspoCRM is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * EspoCRM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with EspoCRM. If not, see http://www.gnu.org/licenses/.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Core\Utils\Database\DBAL\FieldTypes;
+
+use Doctrine\DBAL\Platforms\AbstractPlatform;
+
+class TextType extends \Doctrine\DBAL\Types\TextType
+{
+    public static function getDbTypeName()
+    {
+        return 'mediumtext';
+    }
+
+    public function getSQLDeclaration(array $fieldDeclaration, AbstractPlatform $platform)
+    {
+        return 'MEDIUMTEXT';
+    }
+}

application/Espo/Core/Utils/Database/DBAL/Schema/Comparator.php

@@ -39,6 +39,7 @@ class Comparator extends \Doctrine\DBAL\Schema\Comparator
     public function diffColumn(Column $column1, Column $column2)
     {
         $changedProperties = array();
+
         if ( $column1->getType() != $column2->getType() ) {
 
             //espo: fix problem with executing query for custom types
@@ -82,15 +83,6 @@ class Comparator extends \Doctrine\DBAL\Schema\Comparator
             }
         }
 
-        if ($column1->getType() instanceof \Doctrine\DBAL\Types\TextType) {
-            $length1 = $column1->getLength() ?: 16777215/* mediumtext length*/;
-            $length2 = $column2->getLength() ?: 16777215;
-
-            if ($length1 != -1 && $length2 != -1 && $length2 > $length1) {
-                $changedProperties[] = 'length';
-            }
-        }
-
         if ($column1->getType() instanceof \Doctrine\DBAL\Types\DecimalType) {
             if (($column1->getPrecision()?:10) != ($column2->getPrecision()?:10)) {
                 $changedProperties[] = 'precision';
@@ -124,7 +116,7 @@ class Comparator extends \Doctrine\DBAL\Schema\Comparator
 
         $changedProperties = array_merge($changedProperties, $diffKeys);
 
-        /** Espo: do not change a field length while changing other parameters */
+        /** Espo: do not change a field length downwards */
         if (!empty($changedProperties) && !in_array('length', $changedProperties) && $column1->getType() instanceof \Doctrine\DBAL\Types\StringType) {
             $length1 = $column1->getLength() ?: 255;
             $length2 = $column2->getLength() ?: 255;
@@ -134,6 +126,15 @@ class Comparator extends \Doctrine\DBAL\Schema\Comparator
                 $column2->setLength($length1);
             }
         }
+
+        if (in_array('type', $changedProperties) && $column1->getType() instanceof \Doctrine\DBAL\Types\TextType && isset($column1DbTypeName) && isset($column2DbTypeName)) {
+            $constName1 = '\Espo\Core\Utils\Database\DBAL\Platforms\MySqlPlatform::LENGTH_LIMIT_' . strtoupper($column1DbTypeName);
+            $constName2 = '\Espo\Core\Utils\Database\DBAL\Platforms\MySqlPlatform::LENGTH_LIMIT_' . strtoupper($column2DbTypeName);
+
+            if (defined($constName1) && defined($constName2) && constant($constName1) >= constant($constName2)) {
+                $changedProperties = array_diff($changedProperties, ['type']);
+            }
+        }
         /** Espo: end */
 
         return $changedProperties;

application/Espo/Core/Utils/Database/DBAL/Schema/MySqlSchemaManager.php

@@ -209,7 +209,7 @@ class MySqlSchemaManager extends \Doctrine\DBAL\Schema\MySqlSchemaManager
             case 'text':
             case 'mediumtext':
             case 'longtext':
-                $length = $this->_platform->getClobTypeLength($dbType);
+                $length = null;
                 break;
             /* Espo: end */
         }

application/Espo/Core/Utils/Database/Schema/tables/preferences.php

@@ -46,8 +46,7 @@ return [
                 'type' => 'id',
             ],
             'data' => [
-                'type' => 'text',
-                'len' => 16777216,
+                'type' => 'text'
             ]
         ]
     ],