修复：has_pull_request丢失以及冗余关系apply_signatures移除

app/models/project.rb

@@ -126,7 +126,6 @@ class Project < ApplicationRecord
   has_many :praise_treads, as: :praise_tread_object, dependent: :destroy
   has_and_belongs_to_many :trackers, :order => "#{Tracker.table_name}.position"
   has_one :project_detail, dependent: :destroy
-  has_many :apply_signatures, dependent: :destroy
   has_many :project_units, dependent: :destroy
   has_one :applied_transfer_project,-> { order created_at: :desc }, dependent: :destroy
   has_many :pinned_projects, dependent: :destroy 
@@ -477,6 +476,15 @@ class Project < ApplicationRecord
     return EduSetting.get("project_user_actionable").split(",").include?(self.owner&.login)
   end
 
+  def has_pull_request(branch_name)
+    return true if self.pull_requests.opening.where(head: branch_name).present? || self.pull_requests.opening.where(base: branch_name).present? 
+    if self.forked_from_project_id.present? 
+      return true if self.fork_project.pull_requests.opening.where(head: branch_name).present? || self.fork_project.pull_requests.opening.where(base: branch_name).present?
+    end
+    
+    return false
+  end
+
   def is_need_apply
     return false if EduSetting.get("project_need_apply").nil?
     return EduSetting.get("project_need_apply").split(",").include?(self.id.to_s)