【苏州大学】协同开发调整(#11588)

app/models/project.rb

@@ -258,8 +258,8 @@ class Project < ApplicationRecord
         user_id: self.user_id,
         project_id: self.id
       }
-      user_member = Member.new(member_params)
-      if user_member.save
+      user_member = Member.find_or_create_by(member_params)
+      if user_member.present?
         role_id = Role.select(:id,:position).where(position: 3)&.first&.id
         MemberRole.create!(member_id: user_member.id ,role_id: role_id)
       end