更改：participants创建规则

app/models/issue.rb

@@ -72,6 +72,7 @@ class Issue < ApplicationRecord
   has_many :assigners, through: :issue_assigners
   has_many :issue_participants
   has_many :participants, through: :issue_participants
+  has_many :show_participants, -> {joins(:issue_participants).where.not(issue_participants: {participant_type: "atme"}).distinct}, through: :issue_participants, source: :participant
   has_many :comment_journals, -> {where.not(notes: nil)}, class_name: "Journal", :as => :journalized
   has_many :operate_journals, -> {where(notes: nil)}, class_name: "Journal", :as => :journalized
 

app/models/project.rb

@@ -429,7 +429,7 @@ class Project < ApplicationRecord
     last_issue = self.issues.last 
     deleted_issue_count = ($redis_cache.hget("issue_cache_delete_count", self.id) || 0).to_i
 
-    last_issue&.project_issues_index.present? ? last_issue.project_issues_index + deleted_issue_count : 1
+    last_issue&.project_issues_index.present? ? last_issue.project_issues_index + deleted_issue_count : 0
   end
 
   def incre_project_issue_cache_delete_count 

app/services/api/v1/issues/create_service.rb

@@ -32,17 +32,20 @@ class Api::V1::Issues::CreateService < ApplicationService
         check_issue_status
         check_issue_priority
         check_milestone if milestone_id.present?
+        check_issue_tags unless issue_tag_ids.blank?
+        check_assigners unless assigner_ids.blank?
+        check_attachments unless attachment_ids.blank?
         load_assigners unless assigner_ids.blank?
         load_attachments unless attachment_ids.blank?
         load_issue_tags unless issue_tag_ids.blank?
-        load_participants 
         
         @created_issue = Issue.new(issue_attributes)
         @created_issue.assigners = @assigners unless assigner_ids.blank?
         @created_issue.attachments = @attachments unless attachment_ids.blank?
         @created_issue.issue_tags = @issue_tags unless issue_tag_ids.blank?
-        @created_issue.participants = @participants 
+        build_author_participants
-  
+        build_assinger_participants unless assigner_ids.blank?
+        
         @created_issue.save!
 
         project.del_project_issue_cache_delete_count # 把缓存里存储项目删除issue的个数清除掉
@@ -67,6 +70,29 @@ class Api::V1::Issues::CreateService < ApplicationService
     raise Error, "Milestone不存在！" unless Version.find_by_id(milestone_id).present?
   end
 
+  def check_issue_tags 
+    raise Error, "请输入正确的标记ID数组！" unless issue_tag_ids.is_a?(Array)
+    raise Error, "最多可选择3个标记" if issue_tag_ids.size > 3
+    issue_tag_ids.each do |tid|
+      raise Error, "请输入正确的标记ID！" unless IssueTag.exists?(id: tid)
+    end
+  end
+
+  def check_assigners 
+    raise Error, "请输入正确的负责人ID数组！" unless assigner_ids.is_a?(Array)
+    raise Error, "最多可选择5个负责人" if assigner_ids.size > 5
+    assigner_ids.each do |aid|
+      raise Error, "请输入正确的负责人ID！" unless User.exists?(id: aid)
+    end 
+  end
+
+  def check_attachments 
+    raise Error, "请输入正确的附件ID数组！" unless assigner_ids.is_a?(Array)
+    attachment_ids.each do |aid|
+      raise Error, "请输入正确的附件ID！" unless Attachment.exists?(id: aid)
+    end 
+  end
+
   def load_assigners 
     @assigners = User.where(id: assigner_ids)
   end
@@ -79,10 +105,6 @@ class Api::V1::Issues::CreateService < ApplicationService
     @attachments = Attachment.where(id: attachment_ids)
   end
 
-  def load_participants
-    @participants = User.where(id: assigner_ids).or(User.where(id: current_user.id))
-  end
-
   def issue_attributes 
     issue_attributes = {
       subject: subject,
@@ -104,4 +126,14 @@ class Api::V1::Issues::CreateService < ApplicationService
 
     issue_attributes
   end
+
+  def build_author_participants 
+    @created_issue.issue_participants.new({participant_type: "authored", participant_id: current_user.id})
+  end
+
+  def build_assinger_participants
+    assigner_ids.each do |aid|
+      @created_issue.issue_participants.new({participant_type: "assigned", participant_id: aid})
+    end
+  end
 end