Use timestamps property getter in Eloquent Model (#17612)

Author: Yury Wecerny

src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php

@@ -744,7 +744,7 @@ public function getDates()
     {
         $defaults = [static::CREATED_AT, static::UPDATED_AT];
 
-        return $this->timestamps ? array_merge($this->dates, $defaults) : $this->dates;
+        return $this->usesTimestamps() ? array_merge($this->dates, $defaults) : $this->dates;
     }
 
     /**

src/Illuminate/Database/Eloquent/Concerns/HasTimestamps.php

@@ -20,7 +20,7 @@ trait HasTimestamps
      */
     public function touch()
     {
-        if (! $this->timestamps) {
+        if (! $this->usesTimestamps()) {
             return false;
         }
 

src/Illuminate/Database/Eloquent/Model.php

@@ -568,7 +568,7 @@ protected function performUpdate(Builder $query)
         // First we need to create a fresh query instance and touch the creation and
         // update timestamp on the model which are maintained by us for developer
         // convenience. Then we will just continue saving the model instances.
-        if ($this->timestamps) {
+        if ($this->usesTimestamps()) {
             $this->updateTimestamps();
         }
 
@@ -626,7 +626,7 @@ protected function performInsert(Builder $query)
         // First we'll need to create a fresh query instance and touch the creation and
         // update timestamps on this model, which are maintained by us for developer
         // convenience. After, we will just continue saving these model instances.
-        if ($this->timestamps) {
+        if ($this->usesTimestamps()) {
             $this->updateTimestamps();
         }