diff --git a/src/lib/SchemaToDatabase.php b/src/lib/SchemaToDatabase.php
index ccb230a3..beb27180 100644
--- a/src/lib/SchemaToDatabase.php
+++ b/src/lib/SchemaToDatabase.php
@@ -94,7 +94,7 @@ public function prepareModels(): array
 
         $openApi = $this->config->getOpenApi();
         $junctions = $this->findJunctionSchemas();
-        foreach ($openApi->components->schemas as $schemaName => $openApiSchema) {
+        foreach ($openApi->components->schemas ?? [] as $schemaName => $openApiSchema) {
             $schema = Yii::createObject(ComponentSchema::class, [$openApiSchema, $schemaName]);
 
             if (!$this->canGenerateModel($schemaName, $schema)) {
@@ -153,7 +153,7 @@ public function findJunctionSchemas(): JunctionSchemas
     {
         $junctions = [];
         $openApi = $this->config->getOpenApi();
-        foreach ($openApi->components->schemas as $schemaName => $openApiSchema) {
+        foreach ($openApi->components->schemas ?? [] as $schemaName => $openApiSchema) {
             /**@var ComponentSchema $schema */
             $schema = Yii::createObject(ComponentSchema::class, [$openApiSchema, $schemaName]);
             if ($schema->isNonDb()) {
diff --git a/src/lib/generators/ControllersGenerator.php b/src/lib/generators/ControllersGenerator.php
index bd749c9f..ea0c73c4 100644
--- a/src/lib/generators/ControllersGenerator.php
+++ b/src/lib/generators/ControllersGenerator.php
@@ -59,7 +59,7 @@ public function generate():CodeFiles
             $controllerPath = $path;
             /**
              * @var RestAction|FractalAction $action
-            **/
+             **/
             $action = $actions[0];
             if ($action->prefix && !empty($action->prefixSettings)) {
                 $controllerNamespace = trim($action->prefixSettings['namespace'], '\\');
@@ -126,15 +126,31 @@ protected function makeCustomController(
         ];
         $reflection->addMethod('checkAccess', $params, AbstractMemberGenerator::FLAG_PUBLIC, '//TODO implement checkAccess');
         foreach ($abstractActions as $action) {
+            $responseHttpStatusCodes = '';
+            foreach ($this->config->getOpenApi()->paths->getPaths()[$action->urlPath]->getOperations() as $verb => $operation) {
+                $codes = array_keys($operation->responses->getResponses());
+
+                $only200OrDefault = false;
+                if ($codes === [200] || $codes === ['default']) {
+                    $only200OrDefault = true;
+                }
+                if (in_array('default', $codes) && in_array(200, $codes) && count($codes) === 2) {
+                    $only200OrDefault = true;
+                }
+
+                if ($verb === strtolower($action->requestMethod) && !$only200OrDefault) {
+                    $responseHttpStatusCodes = implode(', ', $codes);
+                }
+            }
+
             $params = array_map(static function ($param) {
                 return ['name' => $param];
             }, $action->getParamNames());
-
             $reflection->addMethod(
                 $action->actionMethodName,
                 $params,
                 AbstractMemberGenerator::FLAG_PUBLIC,
-                '//TODO implement ' . $action->actionMethodName
+                '//TODO implement ' . $action->actionMethodName . ($responseHttpStatusCodes ? PHP_EOL . '// In order to conform with OpenAPI spec, response of this action must have one of the following HTTP status code: ' . $responseHttpStatusCodes : '')
             );
         }
         $classFileGenerator->setClasses([$reflection]);
diff --git a/tests/specs/blog_v2/controllers/CommentController.php b/tests/specs/blog_v2/controllers/CommentController.php
index 0448ec72..c46307ed 100644
--- a/tests/specs/blog_v2/controllers/CommentController.php
+++ b/tests/specs/blog_v2/controllers/CommentController.php
@@ -18,6 +18,7 @@ public function actionListForPost($postId)
     public function actionCreateForPost($postId)
     {
         //TODO implement actionCreateForPost
+        // In order to conform with OpenAPI spec, response of this action must have one of the following HTTP status code: 201, default
     }
 
     public function actionViewForPost($slug, $id)
@@ -28,6 +29,7 @@ public function actionViewForPost($slug, $id)
     public function actionDeleteForPost($slug, $id)
     {
         //TODO implement actionDeleteForPost
+        // In order to conform with OpenAPI spec, response of this action must have one of the following HTTP status code: 204
     }
 
     public function actionUpdateForPost($slug, $id)
diff --git a/tests/specs/issue_fix/163_generator_crash_when_using_reference_inside_an_object/pgsql/controllers/ContactController.php b/tests/specs/issue_fix/163_generator_crash_when_using_reference_inside_an_object/pgsql/controllers/ContactController.php
index 10422b18..5f21cabb 100644
--- a/tests/specs/issue_fix/163_generator_crash_when_using_reference_inside_an_object/pgsql/controllers/ContactController.php
+++ b/tests/specs/issue_fix/163_generator_crash_when_using_reference_inside_an_object/pgsql/controllers/ContactController.php
@@ -13,11 +13,13 @@ public function checkAccess($action, $model = null, $params = [])
     public function actionListForAccount($accountId)
     {
         //TODO implement actionListForAccount
+        // In order to conform with OpenAPI spec, response of this action must have one of the following HTTP status code: 200, 403
     }
 
     public function actionViewForAccount($accountId, $contactId)
     {
         //TODO implement actionViewForAccount
+        // In order to conform with OpenAPI spec, response of this action must have one of the following HTTP status code: 200, 403
     }
 
 
diff --git a/tests/specs/issue_fix/175_bug_allof_with_multiple_dollarrefs/pgsql/controllers/AccountController.php b/tests/specs/issue_fix/175_bug_allof_with_multiple_dollarrefs/pgsql/controllers/AccountController.php
index b4044b8f..cfa4a6d3 100644
--- a/tests/specs/issue_fix/175_bug_allof_with_multiple_dollarrefs/pgsql/controllers/AccountController.php
+++ b/tests/specs/issue_fix/175_bug_allof_with_multiple_dollarrefs/pgsql/controllers/AccountController.php
@@ -13,6 +13,7 @@ public function checkAccess($action, $model = null, $params = [])
     public function actionView($id)
     {
         //TODO implement actionView
+        // In order to conform with OpenAPI spec, response of this action must have one of the following HTTP status code: 200, 404
     }
 
 
diff --git a/tests/specs/issue_fix/78_properties_that_are_marked_as_readonly_are_not_read_only/index.php b/tests/specs/issue_fix/78_properties_that_are_marked_as_readonly_are_not_read_only/index.php
new file mode 100644
index 00000000..9a6fa0f2
--- /dev/null
+++ b/tests/specs/issue_fix/78_properties_that_are_marked_as_readonly_are_not_read_only/index.php
@@ -0,0 +1,13 @@
+<?php
+
+return [
+    'openApiPath' => '@specs/issue_fix/78_properties_that_are_marked_as_readonly_are_not_read_only/index.yaml',
+    'generateUrls' => false,
+    'generateModels' => true,
+    'excludeModels' => [
+        'Error',
+    ],
+    'generateControllers' => false,
+    'generateMigrations' => false,
+    'generateModelFaker' => true, // `generateModels` must be `true` in order to use `generateModelFaker` as `true`
+];
diff --git a/tests/specs/issue_fix/78_properties_that_are_marked_as_readonly_are_not_read_only/index.yaml b/tests/specs/issue_fix/78_properties_that_are_marked_as_readonly_are_not_read_only/index.yaml
new file mode 100644
index 00000000..8f748b8e
--- /dev/null
+++ b/tests/specs/issue_fix/78_properties_that_are_marked_as_readonly_are_not_read_only/index.yaml
@@ -0,0 +1,24 @@
+openapi: 3.0.3
+
+info:
+  title: '#78'
+  version: 1.0.0
+
+paths:
+  /:
+    get:
+      responses:
+        '200':
+          description: The Response
+
+components:
+  schemas:
+    Payment:
+      properties:
+        id:
+          type: integer
+        amount:
+          type: integer
+          readOnly: true
+        currency:
+          type: string
diff --git a/tests/specs/issue_fix/78_properties_that_are_marked_as_readonly_are_not_read_only/mysql/models/BaseModelFaker.php b/tests/specs/issue_fix/78_properties_that_are_marked_as_readonly_are_not_read_only/mysql/models/BaseModelFaker.php
new file mode 100644
index 00000000..c367fbb4
--- /dev/null
+++ b/tests/specs/issue_fix/78_properties_that_are_marked_as_readonly_are_not_read_only/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, $number -1));
+    }
+}
diff --git a/tests/specs/issue_fix/78_properties_that_are_marked_as_readonly_are_not_read_only/mysql/models/Payment.php b/tests/specs/issue_fix/78_properties_that_are_marked_as_readonly_are_not_read_only/mysql/models/Payment.php
new file mode 100644
index 00000000..660670f4
--- /dev/null
+++ b/tests/specs/issue_fix/78_properties_that_are_marked_as_readonly_are_not_read_only/mysql/models/Payment.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace app\models;
+
+class Payment extends \app\models\base\Payment
+{
+
+
+}
+
diff --git a/tests/specs/issue_fix/78_properties_that_are_marked_as_readonly_are_not_read_only/mysql/models/PaymentFaker.php b/tests/specs/issue_fix/78_properties_that_are_marked_as_readonly_are_not_read_only/mysql/models/PaymentFaker.php
new file mode 100644
index 00000000..d2f22af6
--- /dev/null
+++ b/tests/specs/issue_fix/78_properties_that_are_marked_as_readonly_are_not_read_only/mysql/models/PaymentFaker.php
@@ -0,0 +1,42 @@
+<?php
+namespace app\models;
+
+use Faker\UniqueGenerator;
+
+/**
+ * Fake data generator for Payment
+ * @method static Payment makeOne($attributes = [], ?UniqueGenerator $uniqueFaker = null);
+ * @method static Payment saveOne($attributes = [], ?UniqueGenerator $uniqueFaker = null);
+ * @method static Payment[] make(int $number, $commonAttributes = [], ?UniqueGenerator $uniqueFaker = null)
+ * @method static Payment[] save(int $number, $commonAttributes = [], ?UniqueGenerator $uniqueFaker = null)
+ */
+class PaymentFaker extends BaseModelFaker
+{
+
+    /**
+     * @param array|callable $attributes
+     * @return Payment|\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;
+        $model = new Payment();
+        //$model->id = $uniqueFaker->numberBetween(0, 1000000);
+        $model->amount = $faker->numberBetween(0, 1000000);
+        $model->currency = $faker->currencyCode;
+        if (!is_callable($attributes)) {
+            $model->setAttributes($attributes, false);
+        } else {
+            $model = $attributes($model, $faker, $uniqueFaker);
+        }
+        return $model;
+    }
+}
diff --git a/tests/specs/issue_fix/78_properties_that_are_marked_as_readonly_are_not_read_only/mysql/models/base/Payment.php b/tests/specs/issue_fix/78_properties_that_are_marked_as_readonly_are_not_read_only/mysql/models/base/Payment.php
new file mode 100644
index 00000000..129cce90
--- /dev/null
+++ b/tests/specs/issue_fix/78_properties_that_are_marked_as_readonly_are_not_read_only/mysql/models/base/Payment.php
@@ -0,0 +1,31 @@
+<?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 int $amount
+ * @property string $currency
+ *
+ */
+abstract class Payment extends \yii\db\ActiveRecord
+{
+    public static function tableName()
+    {
+        return '{{%payments}}';
+    }
+
+    public function rules()
+    {
+        return [
+            'trim' => [['currency'], 'trim'],
+            'currency_string' => [['currency'], 'string'],
+        ];
+    }
+}
diff --git a/tests/specs/issue_fix/79_response_status_codes_are_not_the_codes_defined_in_spec/index.php b/tests/specs/issue_fix/79_response_status_codes_are_not_the_codes_defined_in_spec/index.php
new file mode 100644
index 00000000..cf88e27a
--- /dev/null
+++ b/tests/specs/issue_fix/79_response_status_codes_are_not_the_codes_defined_in_spec/index.php
@@ -0,0 +1,13 @@
+<?php
+
+return [
+    'openApiPath' => '@specs/issue_fix/79_response_status_codes_are_not_the_codes_defined_in_spec/index.yml',
+    'generateUrls' => false,
+    'generateModels' => false,
+    'excludeModels' => [
+        'Error',
+    ],
+    'generateControllers' => true,
+    'generateMigrations' => false,
+    'generateModelFaker' => false,
+];
diff --git a/tests/specs/issue_fix/79_response_status_codes_are_not_the_codes_defined_in_spec/index.yml b/tests/specs/issue_fix/79_response_status_codes_are_not_the_codes_defined_in_spec/index.yml
new file mode 100644
index 00000000..df5b1314
--- /dev/null
+++ b/tests/specs/issue_fix/79_response_status_codes_are_not_the_codes_defined_in_spec/index.yml
@@ -0,0 +1,36 @@
+openapi: "3.0.0"
+info:
+  version: 1.0.0
+  title: 79_response_status_codes_are_not_the_codes_defined_in_spec
+paths:
+  /mango/cake:
+    get:
+      responses:
+        '200':
+          description: The information
+        '403':
+          description: The information
+        '404':
+          description: The information
+    post:
+      responses:
+        '201':
+          description: The information
+        '403':
+          description: The information
+        '404':
+          description: The information
+        '422':
+          description: The information
+
+components:
+  schemas:
+    Address:
+      type: object
+      description: desc
+      properties:
+        id:
+          type: integer
+        name:
+          type: string
+          maxLength: 64
diff --git a/tests/specs/issue_fix/79_response_status_codes_are_not_the_codes_defined_in_spec/mysql/controllers/MangoController.php b/tests/specs/issue_fix/79_response_status_codes_are_not_the_codes_defined_in_spec/mysql/controllers/MangoController.php
new file mode 100644
index 00000000..46c40ad1
--- /dev/null
+++ b/tests/specs/issue_fix/79_response_status_codes_are_not_the_codes_defined_in_spec/mysql/controllers/MangoController.php
@@ -0,0 +1,27 @@
+<?php
+
+namespace app\controllers;
+
+class MangoController extends \app\controllers\base\MangoController
+{
+
+    public function checkAccess($action, $model = null, $params = [])
+    {
+        //TODO implement checkAccess
+    }
+
+    public function actionCake()
+    {
+        //TODO implement actionCake
+        // In order to conform with OpenAPI spec, response of this action must have one of the following HTTP status code: 200, 403, 404
+    }
+
+    public function actionCreateCake()
+    {
+        //TODO implement actionCreateCake
+        // In order to conform with OpenAPI spec, response of this action must have one of the following HTTP status code: 201, 403, 404, 422
+    }
+
+
+}
+
diff --git a/tests/specs/issue_fix/79_response_status_codes_are_not_the_codes_defined_in_spec/mysql/controllers/base/MangoController.php b/tests/specs/issue_fix/79_response_status_codes_are_not_the_codes_defined_in_spec/mysql/controllers/base/MangoController.php
new file mode 100644
index 00000000..8962c319
--- /dev/null
+++ b/tests/specs/issue_fix/79_response_status_codes_are_not_the_codes_defined_in_spec/mysql/controllers/base/MangoController.php
@@ -0,0 +1,34 @@
+<?php
+
+namespace app\controllers\base;
+
+abstract class MangoController extends \yii\rest\Controller
+{
+    public function actions()
+    {
+        return [
+            'options' => [
+                'class' => \yii\rest\OptionsAction::class,
+            ],
+        ];
+    }
+
+    /**
+     * Checks the privilege of the current user.
+     *
+     * This method checks whether the current user has the privilege
+     * to run the specified action against the specified data model.
+     * If the user does not have access, a [[ForbiddenHttpException]] should be thrown.
+     *
+     * @param string $action the ID of the action to be executed
+     * @param object $model the model to be accessed. If null, it means no specific model is being accessed.
+     * @param array $params additional parameters
+     * @throws \yii\web\ForbiddenHttpException if the user does not have access
+     */
+    abstract public function checkAccess($action, $model = null, $params = []);
+
+    abstract public function actionCake();
+
+    abstract public function actionCreateCake();
+
+}
diff --git a/tests/specs/issue_fix/96_component_schema_should_be_optional/index.php b/tests/specs/issue_fix/96_component_schema_should_be_optional/index.php
new file mode 100644
index 00000000..34db291a
--- /dev/null
+++ b/tests/specs/issue_fix/96_component_schema_should_be_optional/index.php
@@ -0,0 +1,13 @@
+<?php
+
+return [
+    'openApiPath' => '@specs/issue_fix/96_component_schema_should_be_optional/index.yml',
+    'generateUrls' => false,
+    'generateModels' => true,
+    'excludeModels' => [
+        'Error',
+    ],
+    'generateControllers' => false,
+    'generateMigrations' => false,
+    'generateModelFaker' => true,
+];
diff --git a/tests/specs/issue_fix/96_component_schema_should_be_optional/index.yml b/tests/specs/issue_fix/96_component_schema_should_be_optional/index.yml
new file mode 100644
index 00000000..5dcbc3cb
--- /dev/null
+++ b/tests/specs/issue_fix/96_component_schema_should_be_optional/index.yml
@@ -0,0 +1,13 @@
+openapi: "3.0.0"
+info:
+  version: 1.0.0
+  title: 96_component_schema_should_be_optional
+
+paths:
+  /:
+    get:
+      summary: List
+      operationId: list
+      responses:
+        '200':
+          description: The information
diff --git a/tests/specs/issue_fix/96_component_schema_should_be_optional/mysql/models/BaseModelFaker.php b/tests/specs/issue_fix/96_component_schema_should_be_optional/mysql/models/BaseModelFaker.php
new file mode 100644
index 00000000..c367fbb4
--- /dev/null
+++ b/tests/specs/issue_fix/96_component_schema_should_be_optional/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/unit/IssueFixTest.php b/tests/unit/IssueFixTest.php
index 08d1a00c..ff2ebc7d 100644
--- a/tests/unit/IssueFixTest.php
+++ b/tests/unit/IssueFixTest.php
@@ -1044,4 +1044,46 @@ public function test87ImplementForJsonInIsrefpointertoschema()
         $this->checkFiles($actualFiles, $expectedFiles);
         $this->runActualMigrations();
     }
+
+    // https://github.com/php-openapi/yii2-openapi/issues/78
+    public function test78PropertiesThatAreMarkedAsReadonlyAreNotReadOnly()
+    {
+        $testFile = Yii::getAlias("@specs/issue_fix/78_properties_that_are_marked_as_readonly_are_not_read_only/index.php");
+        $this->runGenerator($testFile);
+        $actualFiles = FileHelper::findFiles(Yii::getAlias('@app'), [
+            'recursive' => true,
+        ]);
+        $expectedFiles = FileHelper::findFiles(Yii::getAlias("@specs/issue_fix/78_properties_that_are_marked_as_readonly_are_not_read_only/mysql"), [
+            'recursive' => true,
+        ]);
+        $this->checkFiles($actualFiles, $expectedFiles);
+    }
+
+    // https://github.com/php-openapi/yii2-openapi/issues/79
+    public function test79ResponseStatusCodesAreNotTheCodesDefinedInSpec()
+    {
+        $testFile = Yii::getAlias("@specs/issue_fix/79_response_status_codes_are_not_the_codes_defined_in_spec/index.php");
+        $this->runGenerator($testFile);
+        $actualFiles = FileHelper::findFiles(Yii::getAlias('@app'), [
+            'recursive' => true,
+        ]);
+        $expectedFiles = FileHelper::findFiles(Yii::getAlias("@specs/issue_fix/79_response_status_codes_are_not_the_codes_defined_in_spec/mysql"), [
+            'recursive' => true,
+        ]);
+        $this->checkFiles($actualFiles, $expectedFiles);
+    }
+
+    // https://github.com/php-openapi/yii2-openapi/issues/96
+    public function test96ComponentSchemaShouldBeOptional()
+    {
+        $testFile = Yii::getAlias("@specs/issue_fix/96_component_schema_should_be_optional/index.php");
+        $this->runGenerator($testFile);
+        $actualFiles = FileHelper::findFiles(Yii::getAlias('@app'), [
+            'recursive' => true,
+        ]);
+        $expectedFiles = FileHelper::findFiles(Yii::getAlias("@specs/issue_fix/96_component_schema_should_be_optional/mysql"), [
+            'recursive' => true,
+        ]);
+        $this->checkFiles($actualFiles, $expectedFiles);
+    }
 }