1 files changed, 32 insertions, 5 deletions
diff --git a/app/models/project.rb b/app/models/project.rb
index f01cb613b85..590885c0177 100644
--- a/app/models/project.rb
+++ b/app/models/project.rb
@@ -172,13 +172,13 @@ class Project < ActiveRecord::Base
   validates :description, length: { maximum: 2000 }, allow_blank: true
   validates :name,
     presence: true,
-    length: { within: 0..255 },
+    length: { maximum: 255 },
     format: { with: Gitlab::Regex.project_name_regex,
               message: Gitlab::Regex.project_name_regex_message }
   validates :path,
     presence: true,
     project_path: true,
-    length: { within: 0..255 },
+    length: { maximum: 255 },
     format: { with: Gitlab::Regex.project_path_regex,
               message: Gitlab::Regex.project_path_regex_message }
   validates :namespace, presence: true
@@ -419,7 +419,11 @@ class Project < ActiveRecord::Base
 
     def reference_pattern
       name_pattern = Gitlab::Regex::NAMESPACE_REGEX_STR
-      %r{(?<project>#{name_pattern}/#{name_pattern})}
+
+      %r{
+        ((?<namespace>#{name_pattern})\/)?
+        (?<project>#{name_pattern})
+      }x
     end
 
     def trending
@@ -650,8 +654,20 @@ class Project < ActiveRecord::Base
     end
   end
 
-  def to_reference(_from_project = nil)
-    path_with_namespace
+  def to_reference(from_project = nil)
+    if cross_namespace_reference?(from_project)
+      path_with_namespace
+    elsif cross_project_reference?(from_project)
+      path
+    end
+  end
+
+  def to_human_reference(from_project = nil)
+    if cross_namespace_reference?(from_project)
+      name_with_namespace
+    elsif cross_project_reference?(from_project)
+      name
+    end
   end
 
   def web_url
@@ -1327,10 +1343,21 @@ class Project < ActiveRecord::Base
 
   private
 
+  # Check if a reference is being done cross-project
+  #
+  # from_project - Refering Project object
+  def cross_project_reference?(from_project)
+    from_project && self != from_project
+  end
+
   def pushes_since_gc_redis_key
     "projects/#{id}/pushes_since_gc"
   end
 
+  def cross_namespace_reference?(from_project)
+    from_project && namespace != from_project.namespace
+  end
+
   def default_branch_protected?
     current_application_settings.default_branch_protection == Gitlab::Access::PROTECTION_FULL ||
       current_application_settings.default_branch_protection == Gitlab::Access::PROTECTION_DEV_CAN_MERGE