diff --git a/app/controllers/api/pm/sprint_issues_controller.rb b/app/controllers/api/pm/sprint_issues_controller.rb
index e443fcc0c..9ee62d62c 100644
--- a/app/controllers/api/pm/sprint_issues_controller.rb
+++ b/app/controllers/api/pm/sprint_issues_controller.rb
@@ -8,6 +8,26 @@ class Api::Pm::SprintIssuesController < Api::Pm::BaseController
     render 'api/v1/issues/index'
   end
 
+  def burndown_charts
+    return tip_exception '参数错误' if params[:pm_sprint_id].blank? ||  params[:start_time].blank? ||  params[:end_time].blank?
+    @issues = Issue.where(pm_sprint_id: params[:pm_sprint_id])
+    start_time = Date.parse params[:start_time]
+    end_time = Date.parse params[:end_time]
+    x = (end_time - start_time).to_i + 1 #计算间隔时间 加上最后一天
+    data = {}
+    curren_issues =  @issues.group(:status_id,:due_date).count
+    x.times do |time|
+      e_time = start_time + time
+      undone = curren_issues[[1,nil]].to_i + curren_issues[[1,e_time]].to_i + curren_issues[[2,e_time]].to_i + curren_issues[[3,e_time]].to_i
+      completed = curren_issues[[4,e_time]].to_i + curren_issues[[5,e_time]].to_i
+      data[e_time] = {
+        undone: undone,
+        completed:completed
+      }
+    end
+    render_ok(data: data)
+  end
+
   def statistics
     pm_sprint_ids = params[:pm_sprint_ids].split(",") rescue []
     return tip_exception '参数错误' if pm_sprint_ids.blank?
diff --git a/app/models/attachment.rb b/app/models/attachment.rb
index 810474609..70e1cd03a 100644
--- a/app/models/attachment.rb
+++ b/app/models/attachment.rb
@@ -1,44 +1,46 @@
-# == Schema Information
-#
-# Table name: attachments
-#
-#  id                        :integer          not null, primary key
-#  container_id              :integer
-#  container_type            :string(30)
-#  filename                  :string(255)      default(""), not null
-#  disk_filename             :string(255)      default(""), not null
-#  filesize                  :integer          default("0"), not null
-#  content_type              :string(255)      default("")
-#  digest                    :string(60)       default(""), not null
-#  downloads                 :integer          default("0"), not null
-#  author_id                 :integer          default("0"), not null
-#  created_on                :datetime
-#  description               :text(65535)
-#  disk_directory            :string(255)
-#  attachtype                :integer          default("1")
-#  is_public                 :integer          default("1")
-#  copy_from                 :integer
-#  quotes                    :integer          default("0")
-#  is_publish                :integer          default("1")
-#  publish_time              :datetime
-#  resource_bank_id          :integer
-#  unified_setting           :boolean          default("1")
-#  cloud_url                 :string(255)      default("")
-#  course_second_category_id :integer          default("0")
-#  delay_publish             :boolean          default("0")
-#  memo_image                :boolean          default("0")
-#  extra_type                :integer          default("0")
-#  uuid                      :string(255)
-#
-# Indexes
-#
-#  index_attachments_on_author_id                        (author_id)
-#  index_attachments_on_container_id_and_container_type  (container_id,container_type)
-#  index_attachments_on_course_second_category_id        (course_second_category_id)
-#  index_attachments_on_created_on                       (created_on)
-#  index_attachments_on_is_public                        (is_public)
-#  index_attachments_on_quotes                           (quotes)
-#
+# == Schema Information
+#
+# Table name: attachments
+#
+#  id                        :integer          not null, primary key
+#  container_id              :integer
+#  container_type            :string(30)
+#  filename                  :string(255)      default(""), not null
+#  disk_filename             :string(255)      default(""), not null
+#  filesize                  :integer          default("0"), not null
+#  content_type              :string(255)      default("")
+#  digest                    :string(60)       default(""), not null
+#  downloads                 :integer          default("0"), not null
+#  author_id                 :integer          default("0"), not null
+#  created_on                :datetime
+#  description               :text(65535)
+#  disk_directory            :string(255)
+#  attachtype                :integer          default("1")
+#  is_public                 :integer          default("1")
+#  copy_from                 :integer
+#  quotes                    :integer          default("0")
+#  is_publish                :integer          default("1")
+#  publish_time              :datetime
+#  resource_bank_id          :integer
+#  unified_setting           :boolean          default("1")
+#  cloud_url                 :string(255)      default("")
+#  course_second_category_id :integer          default("0")
+#  delay_publish             :boolean          default("0")
+#  memo_image                :boolean          default("0")
+#  extra_type                :integer          default("0")
+#  uuid                      :string(255)
+#
+# Indexes
+#
+#  index_attachments_on_author_id                        (author_id)
+#  index_attachments_on_container_id_and_container_type  (container_id,container_type)
+#  index_attachments_on_course_second_category_id        (course_second_category_id)
+#  index_attachments_on_created_on                       (created_on)
+#  index_attachments_on_is_public                        (is_public)
+#  index_attachments_on_quotes                           (quotes)
+#  index_attachments_on_uuid                             (uuid)
+#
+
 
 
 
diff --git a/app/models/journal.rb b/app/models/journal.rb
index 2e754c51a..0fdca0f9d 100644
--- a/app/models/journal.rb
+++ b/app/models/journal.rb
@@ -27,6 +27,7 @@
 #
 #  index_journals_on_created_on      (created_on)
 #  index_journals_on_journalized_id  (journalized_id)
+#  index_journals_on_parent_id       (parent_id)
 #  index_journals_on_review_id       (review_id)
 #  index_journals_on_user_id         (user_id)
 #  journals_journalized_id           (journalized_id,journalized_type)
diff --git a/config/routes/api.rb b/config/routes/api.rb
index 50c6a9538..9ee877c2c 100644
--- a/config/routes/api.rb
+++ b/config/routes/api.rb
@@ -25,6 +25,7 @@ defaults format: :json do
       resources :sprint_issues, only: [:index] do 
         collection do 
           get :statistics
+          get :burndown_charts
           post :complete
         end
       end