Apply patch to handle empty string column values for sign media

app/models/signbank/asset.rb

@@ -9,7 +9,7 @@ class Asset < Signbank::Record
     scope :image, -> { where("filename LIKE '%.png'") }
 
     def url
-      return unless super
+      return unless super.presence
 
       AssetURL.new(super).url.to_s
     end

app/models/signbank/example.rb

@@ -9,7 +9,7 @@ class Example < Signbank::Record
     default_scope -> { order(display_order: :asc).where.not(video: nil) }
 
     def video
-      return unless super
+      return unless super.presence
 
       AssetURL.new(super).url.to_s
     end

app/models/signbank/sign.rb

@@ -44,7 +44,7 @@ def picture_url
     end
 
     def video
-      return unless super
+      return unless super.presence
 
       AssetURL.new(super).url.to_s
     end

spec/models/signbank/asset_spec.rb

@@ -29,6 +29,11 @@
       asset = Signbank::Asset.new(url: nil)
       expect(asset.url).to be_nil
     end
+
+    it 'is nil when the URL is blank' do
+      asset = Signbank::Asset.new(url: "")
+      expect(asset.url).to be_nil
+    end
   end
 
   describe '.scoped' do

spec/models/signbank/example_spec.rb

@@ -31,5 +31,10 @@
       example = Signbank::Example.new(video: nil)
       expect(example.video).to be_nil
     end
+
+    it 'is nil when the URL is blank' do
+      example = Signbank::Example.new(video: "")
+      expect(example.video).to be_nil
+    end
   end
 end

spec/models/signbank/sign_spec.rb

@@ -114,5 +114,10 @@ module Signbank
       sign = Signbank::Sign.new(video: nil)
       expect(sign.video).to be_nil
     end
+
+    it 'is nil when the URL is blank' do
+      sign = Signbank::Sign.new(video: "")
+      expect(sign.video).to be_nil
+    end
   end
 end