4 files changed, 61 insertions, 4 deletions
diff --git a/app/serializers/README.md b/app/serializers/README.md
index 0337f88db5f..bb94745b0b5 100644
--- a/app/serializers/README.md
+++ b/app/serializers/README.md
@@ -180,7 +180,7 @@ def index
     render json: MyResourceSerializer
       .new(current_user: @current_user)
       .represent_details(@project.resources)
-  nd
+  end
 end
 ```
 
@@ -196,7 +196,7 @@ def index
         .represent_details(@project.resources),
       count: @project.resources.count
     }
-  nd
+  end
 end
 ```
 
diff --git a/app/serializers/issue_board_entity.rb b/app/serializers/issue_board_entity.rb
new file mode 100644
index 00000000000..6a9e9638e70
--- /dev/null
+++ b/app/serializers/issue_board_entity.rb
@@ -0,0 +1,51 @@
+# frozen_string_literal: true
+
+class IssueBoardEntity < Grape::Entity
+  include RequestAwareEntity
+
+  expose :id
+  expose :iid
+  expose :title
+
+  expose :confidential
+  expose :due_date
+  expose :project_id
+  expose :relative_position
+  expose :weight, if: -> (*) { respond_to?(:weight) }
+
+  expose :project do |issue|
+    API::Entities::Project.represent issue.project, only: [:id, :path]
+  end
+
+  expose :milestone, expose_nil: false do |issue|
+    API::Entities::Project.represent issue.milestone, only: [:id, :title]
+  end
+
+  expose :assignees do |issue|
+    API::Entities::UserBasic.represent issue.assignees, only: [:id, :name, :username, :avatar_url]
+  end
+
+  expose :labels do |issue|
+    LabelEntity.represent issue.labels, project: issue.project, only: [:id, :title, :description, :color, :priority, :text_color]
+  end
+
+  expose :reference_path, if: -> (issue) { issue.project } do |issue, options|
+    options[:include_full_project_path] ? issue.to_reference(full: true) : issue.to_reference
+  end
+
+  expose :real_path, if: -> (issue) { issue.project } do |issue|
+    project_issue_path(issue.project, issue)
+  end
+
+  expose :issue_sidebar_endpoint, if: -> (issue) { issue.project } do |issue|
+    project_issue_path(issue.project, issue, format: :json, serializer: 'sidebar')
+  end
+
+  expose :toggle_subscription_endpoint, if: -> (issue) { issue.project } do |issue|
+    toggle_subscription_project_issue_path(issue.project, issue)
+  end
+
+  expose :assignable_labels_endpoint, if: -> (issue) { issue.project } do |issue|
+    project_labels_path(issue.project, format: :json, include_ancestor_groups: true)
+  end
+end
diff --git a/app/serializers/issue_serializer.rb b/app/serializers/issue_serializer.rb
index 37cf5e28396..d66f0a5acb7 100644
--- a/app/serializers/issue_serializer.rb
+++ b/app/serializers/issue_serializer.rb
@@ -4,15 +4,17 @@ class IssueSerializer < BaseSerializer
   # This overrided method takes care of which entity should be used
   # to serialize the `issue` based on `basic` key in `opts` param.
   # Hence, `entity` doesn't need to be declared on the class scope.
-  def represent(merge_request, opts = {})
+  def represent(issue, opts = {})
     entity =
       case opts[:serializer]
       when 'sidebar'
         IssueSidebarEntity
+      when 'board'
+        IssueBoardEntity
       else
         IssueEntity
       end
 
-    super(merge_request, opts, entity)
+    super(issue, opts, entity)
   end
 end
diff --git a/app/serializers/label_entity.rb b/app/serializers/label_entity.rb
index 98743d62b50..5082245dda9 100644
--- a/app/serializers/label_entity.rb
+++ b/app/serializers/label_entity.rb
@@ -12,4 +12,8 @@ class LabelEntity < Grape::Entity
   expose :text_color
   expose :created_at
   expose :updated_at
+
+  expose :priority, if: -> (*) { options.key?(:project) } do |label|
+    label.priority(options[:project])
+  end
 end