Run phpstan checks.

.travis.yml

@@ -21,17 +21,23 @@ matrix:
     - php: 7.0
       env: PHPCS=1 DEFAULT=0
 
+    - php: 7.0
+      env: PHPSTAN=1 DEFAULT=0
+
 before_script:
   - if [[ $TRAVIS_PHP_VERSION != 7.0 ]]; then phpenv config-rm xdebug.ini; fi
 
-  - composer install --prefer-dist --no-interaction
+  - if [[ $PHPSTAN = 1 ]]; then composer require --dev phpstan/phpstan; fi
+  - if [[ $PHPSTAN != 1 ]]; then composer install --no-interaction; fi
 
 script:
   - if [[ $DEFAULT = 1 && $TRAVIS_PHP_VERSION = 7.0 ]]; then ./vendor/bin/phpunit --coverage-clover=clover.xml; fi
   - if [[ $DEFAULT = 1 && $TRAVIS_PHP_VERSION != 7.0 ]]; then ./vendor/bin/phpunit; fi
 
   - if [[ $PHPCS = 1 ]]; then ./vendor/bin/phpcs -p --extensions=php --standard=vendor/cakephp/cakephp-codesniffer/CakePHP ./src ./tests; fi
 
+  - if [[ $PHPSTAN = 1 ]]; then vendor/bin/phpstan analyse -l 2 src; fi
+
 after_success:
 - if [[ $DEFAULT = 1 && $TRAVIS_PHP_VERSION = 7.0 ]]; then bash <(curl -s https://codecov.io/bash); fi
 

src/Connection.php

@@ -8,6 +8,13 @@
 
 class Connection
 {
+    /**
+     * Driver
+     *
+     * @var \Muffin\Webservice\AbstractDriver
+     */
+    protected $_driver;
+
     /**
      * Constructor
      *

src/Marshaller.php

@@ -4,6 +4,7 @@
 use ArrayObject;
 use Cake\Collection\Collection;
 use Cake\Datasource\EntityInterface;
+use Cake\Datasource\InvalidPropertyInterface;
 use Muffin\Webservice\Model\Endpoint;
 use RuntimeException;
 
@@ -211,7 +212,7 @@ public function merge(EntityInterface $entity, array $data, array $options = [])
         $properties = [];
         foreach ($data as $key => $value) {
             if (!empty($errors[$key])) {
-                if (method_exists($entity, 'invalid')) {
+                if ($entity instanceof InvalidPropertyInterface) {
                     $entity->invalid($key, $value);
                 }
                 continue;

src/Model/Endpoint.php

@@ -231,13 +231,11 @@ public function endpoint($endpoint = null)
      */
     public function alias($alias = null)
     {
-        if ($alias === null) {
-            return $this->_alias;
+        if ($alias !== null) {
+            $this->_alias = $alias;
         }
 
-        $this->_alias = $alias;
-
-        return $this;
+        return $this->_alias;
     }
 
     /**
@@ -968,6 +966,7 @@ protected function _dynamicFinder($method, $args)
             );
         }
 
+        $conditions = [];
         if ($hasOr === false && $hasAnd === false) {
             $conditions = $makeConditions([$fields], $args);
         } elseif ($hasOr !== false) {

src/Query.php

@@ -234,7 +234,7 @@ public function firstOrFail()
      * @param string $field The field to alias.
      * @param null $alias Not being used
      *
-     * @return string The field prefixed with the endpoint alias.
+     * @return array The field prefixed with the endpoint alias.
      */
     public function aliasField($field, $alias = null)
     {

src/Schema.php

@@ -2,6 +2,8 @@
 
 namespace Muffin\Webservice;
 
+use Cake\Database\Type;
+
 /**
  * Represents a single endpoint in a database schema.
  *
@@ -226,7 +228,7 @@ public function columnType($name, $type = null)
      * based upon.
      *
      * @param string $column The column name to get the base type from
-     * @return string The base type name
+     * @return string|null The base type name
      */
     public function baseColumnType($column)
     {