Allow Application#redirect_uri= to handle array of URIs

lib/doorkeeper/models/application_mixin.rb

@@ -43,6 +43,16 @@ def by_uid(uid)
       end
     end
 
+    ##
+    # Set an application's valid redirect URIs.
+    #
+    # @param uris [String, Array] Newline-separated string or array the URI(s)
+    #
+    # @return [String] The redirect URI(s) seperated by newlines.
+    def redirect_uri=(uris)
+      super(uris.is_a?(Array) ? uris.join("\n") : uris)
+    end
+
     private
 
     def has_scopes?

spec/models/doorkeeper/application_spec.rb

@@ -136,6 +136,21 @@ module Doorkeeper
       end
     end
 
+    describe "#redirect_uri=" do
+      context "when array of valid redirect_uris" do
+        it "should join by newline" do
+          new_application.redirect_uri = ['http://localhost/callback1', 'http://localhost/callback2']
+          expect(new_application.redirect_uri).to eq("http://localhost/callback1\nhttp://localhost/callback2")
+        end
+      end
+      context "when string of valid redirect_uris" do
+        it "should store as-is" do
+          new_application.redirect_uri = "http://localhost/callback1\nhttp://localhost/callback2"
+          expect(new_application.redirect_uri).to eq("http://localhost/callback1\nhttp://localhost/callback2")
+        end
+      end
+    end
+
     describe :authorized_for do
       let(:resource_owner) { double(:resource_owner, id: 10) }