新增：项目数据集模型

app/models/project.rb

@@ -137,6 +137,7 @@ class Project < ApplicationRecord
   has_many :project_topics, through: :project_topic_ralates
   has_many :commit_logs, dependent: :destroy
   has_many :daily_project_statistics, dependent: :destroy
+  has_one :project_dataset, dependent: :destroy
   after_create :incre_user_statistic, :incre_platform_statistic
   after_save :check_project_members
   before_save :set_invite_code, :reset_unmember_followed, :set_recommend_and_is_pinned, :reset_cache_data

app/models/project_dataset.rb

@@ -0,0 +1,21 @@
+# == Schema Information
+#
+# Table name: project_datasets
+#
+#  id          :integer          not null, primary key
+#  title       :string(255)
+#  description :text(65535)
+#  project_id  :integer
+#  created_at  :datetime         not null
+#  updated_at  :datetime         not null
+#
+# Indexes
+#
+#  index_project_datasets_on_project_id  (project_id)
+#
+
+class ProjectDataset < ApplicationRecord
+
+  belongs_to :project
+  
+end

app/models/project_unit.rb

@@ -17,7 +17,7 @@ class ProjectUnit < ApplicationRecord
 
   belongs_to :project
 
-  enum unit_type: {code: 1, issues: 2, pulls: 3, wiki:4, devops: 5, versions: 6, resources: 7, services: 8}
+  enum unit_type: {code: 1, issues: 2, pulls: 3, wiki:4, devops: 5, versions: 6, resources: 7, services: 8, dataset: 9}
 
   validates :unit_type, uniqueness: { scope: :project_id}