新增：项目中所有未关联迭代工作项

app/services/api/pm/sprint_issues/list_service.rb

@@ -0,0 +1,54 @@
+class Api::Pm::SprintIssues::ListService < ApplicationService
+
+  include ActiveModel::Model 
+
+  attr_reader :category, :pm_project_id, :pm_issue_type, :assigner_id, :priority_id, :status_id, :keyword, :current_user
+  attr_reader :sort_by, :sort_direction
+  attr_accessor :queried_issues
+
+  validates :category, inclusion: { in: %w[linked unlink], message: '请输入正确的Category'}
+  validates :sort_by, inclusion: { in: %w[issues.created_on issues.updated_on issue_priorities.position] , message: '请输入正确的SortBy'}, allow_blank: true
+  validates :sort_direction, inclusion: { in: %w[asc desc], message: '请输入正确的SortDirection'}, allow_blank: true
+
+  validates :pm_project_id, :current_user, presence: true
+
+  def initialize(params, current_user = nil)
+    @category = params[:category] || "unlink"
+    @pm_project_id = params[:pm_project_id]
+    @pm_issue_type = params[:pm_issue_type]
+    @assigner_id = params[:assigner_id]
+    @priority_id = params[:priority_id]
+    @status_id = params[:status_id]
+    @keyword = params[:keyword]
+    @current_user = current_user
+  end
+
+  def call 
+    raise Error, errors.full_messages.join(', ') unless valid? 
+
+    issue_query_data
+
+    @queried_issues
+  end
+
+  private
+  def issue_query_data
+     issues = @category == "unlink" ? Issue.where(pm_project_id: @pm_project_id, pm_sprint_id: nil) : Issue.where(pm_project_id: @pm_project_id).where.not(pm_sprint_id: nil)
+
+     issues = issues.where(pm_issue_type: @pm_issue_type) if @pm_issue_type.present?
+
+     issues = issues.joins(:assigners).where(users: {id: @assigner_id}) if @assigner_id.present?
+
+     issues = issues.where(priority_id: @priority_id) if @priority_id.present?
+
+     issues = issues.where(status_id: @status_id) if @status_id.present? 
+
+     issues = issues.ransack(subject_cont: @keyword).result if @keyword.present?
+
+     scope = issues.includes(:priority, :issue_status, :user, :show_assigners, :show_issue_tags, :version, :comment_journals)
+     scope = scope.reorder("#{sort_by} #{sort_direction}").distinct
+
+     @queried_issues = scope
+ 
+  end
+end