diff --git a/README.md b/README.md
index f68df469..7d1c4c8a 100644
--- a/README.md
+++ b/README.md
@@ -350,7 +350,7 @@ related objects, `x-no-relation` (type: boolean, default: false) is used.
 
 This will not generate 'comments' column in database migrations. But it will generate `getComments()` relation in Yii model file.
 
-In order to make it real database column, extension `x-no-relation` can be used.
+In order to make it real database column, OpenAPI extension `x-no-relation` can be used.
 
 ```yaml
         comments:
diff --git a/src/lib/ValidationRulesBuilder.php b/src/lib/ValidationRulesBuilder.php
index 33a89949..33347314 100644
--- a/src/lib/ValidationRulesBuilder.php
+++ b/src/lib/ValidationRulesBuilder.php
@@ -243,10 +243,7 @@ private function prepareTypeScope():void
             if ($attribute->isReadOnly()) {
                 continue;
             }
-            // column/field/property with name `id` is considered as Primary Key by this library, and it is automatically handled by DB/Yii; so remove it from validation `rules()`
-            if (in_array($attribute->columnName, ['id', $this->model->pkName]) ||
-                in_array($attribute->propertyName, ['id', $this->model->pkName])
-            ) {
+            if ($this->isIdColumn($attribute)) {
                 continue;
             }
             if (/*$attribute->defaultValue === null &&*/ $attribute->isRequired()) {
diff --git a/src/lib/openapi/ComponentSchema.php b/src/lib/openapi/ComponentSchema.php
index 809f0958..9386bf2a 100644
--- a/src/lib/openapi/ComponentSchema.php
+++ b/src/lib/openapi/ComponentSchema.php
@@ -14,8 +14,6 @@
 use cebe\yii2openapi\lib\SchemaToDatabase;
 use Generator;
 use Yii;
-use yii\helpers\Inflector;
-use yii\helpers\StringHelper;
 use function in_array;
 
 class ComponentSchema
@@ -106,7 +104,9 @@ public function isRequiredProperty(string $propName):bool
 
     public function isNonDb():bool
     {
-        return isset($this->schema->{CustomSpecAttr::TABLE}) && $this->schema->{CustomSpecAttr::TABLE} === false;
+        return
+            isset($this->schema->{CustomSpecAttr::TABLE}) &&
+            $this->schema->{CustomSpecAttr::TABLE} === false;
     }
 
     public function resolveTableName(string $schemaName):string
diff --git a/src/lib/openapi/PropertySchema.php b/src/lib/openapi/PropertySchema.php
index eade252e..56d6df7a 100644
--- a/src/lib/openapi/PropertySchema.php
+++ b/src/lib/openapi/PropertySchema.php
@@ -145,6 +145,11 @@ public function __construct(SpecObjectInterface $property, string $name, Compone
             $property = $this->property;
         }
 
+        // don't go reference part if `x-no-relation` is true
+        if ($this->getAttr(CustomSpecAttr::NO_RELATION)) {
+            return;
+        }
+
         if ($property instanceof Reference) {
             $this->initReference();
         } elseif (
@@ -497,6 +502,7 @@ public function guessDbType($forReference = false):string
                 }
                 return YiiDbSchema::TYPE_TEXT;
             case 'object':
+            case 'array':
             {
                 return YiiDbSchema::TYPE_JSON;
             }
diff --git a/tests/specs/issue_fix/20_consider_openapi_spec_examples_in_faker_code_generation/mysql/migrations_mysql_db/m200000_000001_create_table_pets.php b/tests/specs/issue_fix/20_consider_openapi_spec_examples_in_faker_code_generation/mysql/migrations_mysql_db/m200000_000001_create_table_pets.php
index 01df98f3..3099e6fe 100644
--- a/tests/specs/issue_fix/20_consider_openapi_spec_examples_in_faker_code_generation/mysql/migrations_mysql_db/m200000_000001_create_table_pets.php
+++ b/tests/specs/issue_fix/20_consider_openapi_spec_examples_in_faker_code_generation/mysql/migrations_mysql_db/m200000_000001_create_table_pets.php
@@ -11,21 +11,21 @@ public function up()
             'id' => $this->primaryKey(),
             'name' => $this->text()->notNull(),
             'age' => $this->integer()->null()->defaultValue(null),
-            'tags' => $this->text()->null(),
-            'tags_arbit' => $this->text()->null(),
-            'number_arr' => $this->text()->null(),
-            'number_arr_min_uniq' => $this->text()->null(),
-            'int_arr' => $this->text()->null(),
-            'int_arr_min_uniq' => $this->text()->null(),
-            'bool_arr' => $this->text()->null(),
-            'arr_arr_int' => $this->text()->null(),
-            'arr_arr_str' => $this->text()->null(),
-            'arr_arr_arr_str' => $this->text()->null(),
-            'arr_of_obj' => $this->text()->null(),
-            'user_ref_obj_arr' => $this->string()->null()->defaultValue(null),
-            'one_of_arr' => $this->text()->null(),
-            'one_of_arr_complex' => $this->text()->null(),
-            'one_of_from_multi_ref_arr' => $this->text()->null(),
+            'tags' => 'json NOT NULL',
+            'tags_arbit' => 'json NOT NULL',
+            'number_arr' => 'json NOT NULL',
+            'number_arr_min_uniq' => 'json NOT NULL',
+            'int_arr' => 'json NOT NULL',
+            'int_arr_min_uniq' => 'json NOT NULL',
+            'bool_arr' => 'json NOT NULL',
+            'arr_arr_int' => 'json NOT NULL',
+            'arr_arr_str' => 'json NOT NULL',
+            'arr_arr_arr_str' => 'json NOT NULL',
+            'arr_of_obj' => 'json NOT NULL',
+            'user_ref_obj_arr' => 'json NOT NULL',
+            'one_of_arr' => 'json NOT NULL',
+            'one_of_arr_complex' => 'json NOT NULL',
+            'one_of_from_multi_ref_arr' => 'json NOT NULL',
         ]);
     }
 
diff --git a/tests/specs/issue_fix/20_consider_openapi_spec_examples_in_faker_code_generation/mysql/models/base/Pet.php b/tests/specs/issue_fix/20_consider_openapi_spec_examples_in_faker_code_generation/mysql/models/base/Pet.php
index c0621fd6..ae87e515 100644
--- a/tests/specs/issue_fix/20_consider_openapi_spec_examples_in_faker_code_generation/mysql/models/base/Pet.php
+++ b/tests/specs/issue_fix/20_consider_openapi_spec_examples_in_faker_code_generation/mysql/models/base/Pet.php
@@ -23,13 +23,12 @@
  * @property array $arr_arr_str
  * @property array $arr_arr_arr_str
  * @property array $arr_of_obj
- * @property User[] $user_ref_obj_arr
+ * @property array $user_ref_obj_arr
  * @property array $one_of_arr
  * @property array $one_of_arr_complex
  * @property array $one_of_from_multi_ref_arr
  *
  * @property array|\app\models\User[] $userRefObjArrNormal
- * @property array|\app\models\User[] $userRefObjArr
  */
 abstract class Pet extends \yii\db\ActiveRecord
 {
@@ -53,9 +52,4 @@ public function getUserRefObjArrNormal()
     {
         return $this->hasMany(\app\models\User::class, ['pet_id' => 'id'])->inverseOf('pet');
     }
-
-    public function getUserRefObjArr()
-    {
-        return $this->hasMany(\app\models\User::class, ['pet_id' => 'id'])->inverseOf('pet');
-    }
 }
diff --git a/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/index.php b/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/index.php
new file mode 100644
index 00000000..d10773f1
--- /dev/null
+++ b/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/index.php
@@ -0,0 +1,13 @@
+<?php
+
+return [
+    'openApiPath' => '@specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/index.yaml',
+    'generateUrls' => false,
+    'generateModels' => true,
+    'excludeModels' => [
+        'Error',
+    ],
+    'generateControllers' => false,
+    'generateMigrations' => true,
+    'generateModelFaker' => true, // `generateModels` must be `true` in order to use `generateModelFaker` as `true`
+];
diff --git a/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/index.yaml b/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/index.yaml
new file mode 100644
index 00000000..669f6239
--- /dev/null
+++ b/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/index.yaml
@@ -0,0 +1,35 @@
+openapi: 3.0.3
+
+info:
+  title: '#23'
+  version: 1.0.0
+
+paths:
+  /:
+    get:
+      responses:
+        '200':
+          description: The Response
+
+
+
+components:
+  schemas:
+    Payments:
+      properties:
+        id:
+          type: integer
+        currency:
+          type: string
+        samples:
+          type: array
+          x-no-relation: true
+          items:
+            $ref: '#/components/schemas/Sample'
+
+    Sample:
+      properties:
+        id:
+          type: integer
+        message:
+          type: string
\ No newline at end of file
diff --git a/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/mysql/migrations_mysql_db/m200000_000000_create_table_payments.php b/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/mysql/migrations_mysql_db/m200000_000000_create_table_payments.php
new file mode 100644
index 00000000..5579f4e7
--- /dev/null
+++ b/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/mysql/migrations_mysql_db/m200000_000000_create_table_payments.php
@@ -0,0 +1,21 @@
+<?php
+
+/**
+ * Table for Payments
+ */
+class m200000_000000_create_table_payments extends \yii\db\Migration
+{
+    public function up()
+    {
+        $this->createTable('{{%payments}}', [
+            'id' => $this->primaryKey(),
+            'currency' => $this->text()->null(),
+            'samples' => 'json NOT NULL',
+        ]);
+    }
+
+    public function down()
+    {
+        $this->dropTable('{{%payments}}');
+    }
+}
diff --git a/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/mysql/migrations_mysql_db/m200000_000001_create_table_samples.php b/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/mysql/migrations_mysql_db/m200000_000001_create_table_samples.php
new file mode 100644
index 00000000..b5b3a86c
--- /dev/null
+++ b/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/mysql/migrations_mysql_db/m200000_000001_create_table_samples.php
@@ -0,0 +1,20 @@
+<?php
+
+/**
+ * Table for Sample
+ */
+class m200000_000001_create_table_samples extends \yii\db\Migration
+{
+    public function up()
+    {
+        $this->createTable('{{%samples}}', [
+            'id' => $this->primaryKey(),
+            'message' => $this->text()->null(),
+        ]);
+    }
+
+    public function down()
+    {
+        $this->dropTable('{{%samples}}');
+    }
+}
diff --git a/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/mysql/models/BaseModelFaker.php b/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/mysql/models/BaseModelFaker.php
new file mode 100644
index 00000000..c367fbb4
--- /dev/null
+++ b/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/mysql/models/BaseModelFaker.php
@@ -0,0 +1,144 @@
+<?php
+
+namespace app\models;
+
+use Faker\Factory as FakerFactory;
+use Faker\Generator;
+use Faker\UniqueGenerator;
+
+/**
+ * Base fake data generator
+ */
+abstract class BaseModelFaker
+{
+    /**
+     * @var Generator
+    */
+    protected $faker;
+    /**
+     * @var UniqueGenerator
+    */
+    protected $uniqueFaker;
+
+    public function __construct()
+    {
+        $this->faker = FakerFactory::create(str_replace('-', '_', \Yii::$app->language));
+        $this->uniqueFaker = new UniqueGenerator($this->faker);
+    }
+
+    abstract public function generateModel($attributes = []);
+
+    public function getFaker():Generator
+    {
+        return $this->faker;
+    }
+
+    public function getUniqueFaker():UniqueGenerator
+    {
+        return $this->uniqueFaker;
+    }
+
+    public function setFaker(Generator $faker):void
+    {
+        $this->faker = $faker;
+    }
+
+    public function setUniqueFaker(UniqueGenerator $faker):void
+    {
+        $this->uniqueFaker = $faker;
+    }
+
+    /**
+     * Generate and return model
+     * @param array|callable $attributes
+     * @param UniqueGenerator|null $uniqueFaker
+     * @return \yii\db\ActiveRecord
+     * @example MyFaker::makeOne(['user_id' => 1, 'title' => 'foo']);
+     * @example MyFaker::makeOne( function($model, $faker) {
+     *        $model->scenario = 'create';
+     *        $model->setAttributes(['user_id' => 1, 'title' => $faker->sentence]);
+     *        return $model;
+     *  });
+     */
+    public static function makeOne($attributes = [], ?UniqueGenerator $uniqueFaker = null)
+    {
+        $fakeBuilder = new static();
+        if ($uniqueFaker !== null) {
+            $fakeBuilder->setUniqueFaker($uniqueFaker);
+        }
+        $model = $fakeBuilder->generateModel($attributes);
+        return $model;
+    }
+
+    /**
+     * Generate, save and return model
+     * @param array|callable $attributes
+     * @param UniqueGenerator|null $uniqueFaker
+     * @return \yii\db\ActiveRecord
+     * @example MyFaker::saveOne(['user_id' => 1, 'title' => 'foo']);
+     * @example MyFaker::saveOne( function($model, $faker) {
+     *        $model->scenario = 'create';
+     *        $model->setAttributes(['user_id' => 1, 'title' => $faker->sentence]);
+     *        return $model;
+     *  });
+     */
+    public static function saveOne($attributes = [], ?UniqueGenerator $uniqueFaker = null)
+    {
+        $model = static::makeOne($attributes, $uniqueFaker);
+        $model->save();
+        return $model;
+    }
+
+    /**
+     * Generate and return multiple models
+     * @param int $number
+     * @param array|callable $commonAttributes
+     * @return \yii\db\ActiveRecord[]|array
+     * @example TaskFaker::make(5, ['project_id'=>1, 'user_id' => 2]);
+     * @example TaskFaker::make(5, function($model, $faker, $uniqueFaker) {
+     *       $model->setAttributes(['name' => $uniqueFaker->username, 'state'=>$faker->boolean(20)]);
+     *       return $model;
+     * });
+     */
+    public static function make(int $number, $commonAttributes = [], ?UniqueGenerator $uniqueFaker = null):array
+    {
+        if ($number < 1) {
+            return [];
+        }
+        $fakeBuilder = new static();
+        if ($uniqueFaker !== null) {
+            $fakeBuilder->setUniqueFaker($uniqueFaker);
+        }
+        return array_map(function () use ($commonAttributes, $fakeBuilder) {
+            $model = $fakeBuilder->generateModel($commonAttributes);
+            return $model;
+        }, range(0, $number -1));
+    }
+
+    /**
+     * Generate, save and return multiple models
+     * @param int $number
+     * @param array|callable $commonAttributes
+     * @return \yii\db\ActiveRecord[]|array
+     * @example TaskFaker::save(5, ['project_id'=>1, 'user_id' => 2]);
+     * @example TaskFaker::save(5, function($model, $faker, $uniqueFaker) {
+     *       $model->setAttributes(['name' => $uniqueFaker->username, 'state'=>$faker->boolean(20)]);
+     *       return $model;
+     * });
+     */
+    public static function save(int $number, $commonAttributes = [], ?UniqueGenerator $uniqueFaker = null):array
+    {
+        if ($number < 1) {
+            return [];
+        }
+        $fakeBuilder = new static();
+        if ($uniqueFaker !== null) {
+            $fakeBuilder->setUniqueFaker($uniqueFaker);
+        }
+        return array_map(function () use ($commonAttributes, $fakeBuilder) {
+            $model = $fakeBuilder->generateModel($commonAttributes);
+            $model->save();
+            return $model;
+        }, range(0, $number -1));
+    }
+}
diff --git a/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/mysql/models/Payments.php b/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/mysql/models/Payments.php
new file mode 100644
index 00000000..ea2262fe
--- /dev/null
+++ b/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/mysql/models/Payments.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace app\models;
+
+class Payments extends \app\models\base\Payments
+{
+
+
+}
+
diff --git a/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/mysql/models/PaymentsFaker.php b/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/mysql/models/PaymentsFaker.php
new file mode 100644
index 00000000..1f3133dd
--- /dev/null
+++ b/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/mysql/models/PaymentsFaker.php
@@ -0,0 +1,44 @@
+<?php
+namespace app\models;
+
+use Faker\UniqueGenerator;
+
+/**
+ * Fake data generator for Payments
+ * @method static Payments makeOne($attributes = [], ?UniqueGenerator $uniqueFaker = null);
+ * @method static Payments saveOne($attributes = [], ?UniqueGenerator $uniqueFaker = null);
+ * @method static Payments[] make(int $number, $commonAttributes = [], ?UniqueGenerator $uniqueFaker = null)
+ * @method static Payments[] save(int $number, $commonAttributes = [], ?UniqueGenerator $uniqueFaker = null)
+ */
+class PaymentsFaker extends BaseModelFaker
+{
+
+    /**
+     * @param array|callable $attributes
+     * @return Payments|\yii\db\ActiveRecord
+     * @example
+     *  $model = (new PostFaker())->generateModels(['author_id' => 1]);
+     *  $model = (new PostFaker())->generateModels(function($model, $faker, $uniqueFaker) {
+     *            $model->scenario = 'create';
+     *            $model->author_id = 1;
+     *            return $model;
+     *  });
+    **/
+    public function generateModel($attributes = [])
+    {
+        $faker = $this->faker;
+        $uniqueFaker = $this->uniqueFaker;
+        $model = new Payments();
+        //$model->id = $uniqueFaker->numberBetween(0, 1000000);
+        $model->currency = $faker->currencyCode;
+        $model->samples = array_map(function () use ($faker, $uniqueFaker) {
+            return (new SampleFaker)->generateModel()->attributes;
+        }, range(1, 4));
+        if (!is_callable($attributes)) {
+            $model->setAttributes($attributes, false);
+        } else {
+            $model = $attributes($model, $faker, $uniqueFaker);
+        }
+        return $model;
+    }
+}
diff --git a/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/mysql/models/Sample.php b/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/mysql/models/Sample.php
new file mode 100644
index 00000000..4e8b4547
--- /dev/null
+++ b/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/mysql/models/Sample.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace app\models;
+
+class Sample extends \app\models\base\Sample
+{
+
+
+}
+
diff --git a/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/mysql/models/SampleFaker.php b/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/mysql/models/SampleFaker.php
new file mode 100644
index 00000000..4a0f6d29
--- /dev/null
+++ b/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/mysql/models/SampleFaker.php
@@ -0,0 +1,41 @@
+<?php
+namespace app\models;
+
+use Faker\UniqueGenerator;
+
+/**
+ * Fake data generator for Sample
+ * @method static Sample makeOne($attributes = [], ?UniqueGenerator $uniqueFaker = null);
+ * @method static Sample saveOne($attributes = [], ?UniqueGenerator $uniqueFaker = null);
+ * @method static Sample[] make(int $number, $commonAttributes = [], ?UniqueGenerator $uniqueFaker = null)
+ * @method static Sample[] save(int $number, $commonAttributes = [], ?UniqueGenerator $uniqueFaker = null)
+ */
+class SampleFaker extends BaseModelFaker
+{
+
+    /**
+     * @param array|callable $attributes
+     * @return Sample|\yii\db\ActiveRecord
+     * @example
+     *  $model = (new PostFaker())->generateModels(['author_id' => 1]);
+     *  $model = (new PostFaker())->generateModels(function($model, $faker, $uniqueFaker) {
+     *            $model->scenario = 'create';
+     *            $model->author_id = 1;
+     *            return $model;
+     *  });
+    **/
+    public function generateModel($attributes = [])
+    {
+        $faker = $this->faker;
+        $uniqueFaker = $this->uniqueFaker;
+        $model = new Sample();
+        //$model->id = $uniqueFaker->numberBetween(0, 1000000);
+        $model->message = $faker->sentence;
+        if (!is_callable($attributes)) {
+            $model->setAttributes($attributes, false);
+        } else {
+            $model = $attributes($model, $faker, $uniqueFaker);
+        }
+        return $model;
+    }
+}
diff --git a/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/mysql/models/base/Payments.php b/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/mysql/models/base/Payments.php
new file mode 100644
index 00000000..6e797741
--- /dev/null
+++ b/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/mysql/models/base/Payments.php
@@ -0,0 +1,32 @@
+<?php
+
+/**
+ * This file is generated by Gii, do not change manually!
+ */
+
+namespace app\models\base;
+
+/**
+ * This is the model class for table "payments".
+ *
+ * @property int $id
+ * @property string $currency
+ * @property array $samples
+ *
+ */
+abstract class Payments extends \yii\db\ActiveRecord
+{
+    public static function tableName()
+    {
+        return '{{%payments}}';
+    }
+
+    public function rules()
+    {
+        return [
+            'trim' => [['currency'], 'trim'],
+            'currency_string' => [['currency'], 'string'],
+            'safe' => [['samples'], 'safe'],
+        ];
+    }
+}
diff --git a/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/mysql/models/base/Sample.php b/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/mysql/models/base/Sample.php
new file mode 100644
index 00000000..656ff1eb
--- /dev/null
+++ b/tests/specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/mysql/models/base/Sample.php
@@ -0,0 +1,30 @@
+<?php
+
+/**
+ * This file is generated by Gii, do not change manually!
+ */
+
+namespace app\models\base;
+
+/**
+ * This is the model class for table "samples".
+ *
+ * @property int $id
+ * @property string $message
+ *
+ */
+abstract class Sample extends \yii\db\ActiveRecord
+{
+    public static function tableName()
+    {
+        return '{{%samples}}';
+    }
+
+    public function rules()
+    {
+        return [
+            'trim' => [['message'], 'trim'],
+            'message_string' => [['message'], 'string'],
+        ];
+    }
+}
diff --git a/tests/unit/IssueFixTest.php b/tests/unit/IssueFixTest.php
index ad3ff8fd..9d20ae4d 100644
--- a/tests/unit/IssueFixTest.php
+++ b/tests/unit/IssueFixTest.php
@@ -1014,4 +1014,19 @@ public function test22BugRulesRequiredIsGeneratedBeforeDefault()
         ]);
         $this->checkFiles($actualFiles, $expectedFiles);
     }
+
+    // https://github.com/php-openapi/yii2-openapi/issues/23
+    public function test23ConsiderOpenapiExtensionXNoRelationAlsoInOtherPertinentPlace()
+    {
+        $testFile = Yii::getAlias("@specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/index.php");
+        $this->runGenerator($testFile);
+        $actualFiles = FileHelper::findFiles(Yii::getAlias('@app'), [
+            'recursive' => true,
+        ]);
+        $expectedFiles = FileHelper::findFiles(Yii::getAlias("@specs/issue_fix/23_consider_openapi_extension_x_no_relation_also_in_other_pertinent_place/mysql"), [
+            'recursive' => true,
+        ]);
+        $this->checkFiles($actualFiles, $expectedFiles);
+        $this->runActualMigrations();
+    }
 }