Showing image error messages

The errors are set on the file property which doesn’t have a former field to render it.  So they need to be retrieved.

Fixes #68

classes/Fields/Image.php

@@ -100,6 +100,20 @@ protected function applyRules()
         $live->apply($rules);
     }
 
+    /**
+     * Show errors that will have been stored on the `file` proeperty
+     *
+     * @return void
+     */
+    public function showErrors()
+    {
+        $key = sprintf('images.%s.file', $this->inputId());
+        if (session('errors') && ($error = session('errors')->first($key))) {
+            $this->help($error);
+            $this->group->addClass('has-error');
+        }
+    }
+
     /**
      * Give the file input the prefixed name.
      *
@@ -126,6 +140,9 @@ public function wrapAndRender()
         // Add the aspect ratio choice
         $this->group->dataAspectRatio($this->ratio ?: false);
 
+        // Set errors
+        $this->showErrors();
+
         // Inform whether there is an existing image to preview
         if ($this->hasImage()) {
             $this->group->addClass('has-image');

example/app/Article.php

@@ -15,7 +15,7 @@ class Article extends Base
     public static $rules = [
         'title' => 'required',
         'slug' => 'alpha_dash|unique:articles',
-        'images.image' => 'image',
+        'images.image' => 'image|dimensions:min_width=10',
         'date' => 'required',
     ];
 

example/resources/views/admin/articles/edit.haml.php

@@ -6,7 +6,7 @@
 	.legend= empty($item) ? 'New' : 'Edit'
 	!= Former::text('title')
 	!= Former::wysiwyg('body')
-	!= Former::image('image')
+	!= Former::image('image')->blockHelp('Used in listings and details')
 
 %fieldset
 	.legend Other