From f75a2710d5d3d35ea760061856a57ba04f6efaa7 Mon Sep 17 00:00:00 2001
From: Mojca Lorber <mlorber@biosistemika.com>
Date: Mon, 13 Nov 2017 18:03:14 +0100
Subject: [PATCH] fix preview for images with transparent background

---
 app/models/asset.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/app/models/asset.rb b/app/models/asset.rb
index 4ef35b06b..5298f4388 100644
--- a/app/models/asset.rb
+++ b/app/models/asset.rb
@@ -12,8 +12,8 @@ class Asset < ActiveRecord::Base
   has_attached_file :file,
                     styles: { large: [Constants::LARGE_PIC_FORMAT, :jpg],
                               medium: [Constants::MEDIUM_PIC_FORMAT, :jpg] },
-                    convert_options: { medium: '-quality 70 -strip' }
-
+                    convert_options: { medium: '-quality 70 -strip',
+                                       all: '-alpha remove' }
   validates_attachment :file,
                        presence: true,
                        size: {