新增：issue负责人变更为一对多

app/controllers/api/v1/issues/assigners_controller.rb

@@ -0,0 +1,10 @@
+class Api::V1::Issues::AssignersController < Api::V1::BaseController 
+
+  before_action :require_public_and_member_above, only: [:index] 
+
+  # 负责人列表 
+  def index
+    @assigners = User.joins(assigned_issues: :project).where(projects: {id: @project&.id})
+    @assigners = kaminary_select_paginate(@assigners)
+  end
+end

app/models/issue.rb

@@ -68,6 +68,9 @@ class Issue < ApplicationRecord
   has_many :issue_tags, through: :issue_tags_relates
   has_many :issue_times, dependent: :destroy
   has_many :issue_depends, dependent: :destroy
+  has_many :issue_assigners
+  has_many :assigners, through: :issue_assigners
+
   scope :issue_includes, ->{includes(:user)}
   scope :issue_many_includes, ->{includes(journals: :user)}
   scope :issue_issue, ->{where(issue_classify: [nil,"issue"])}

app/models/issue_assigner.rb

@@ -0,0 +1,20 @@
+# == Schema Information
+#
+# Table name: issue_assigners
+#
+#  id          :integer          not null, primary key
+#  issue_id    :integer
+#  assigner_id :integer
+#  created_at  :datetime         not null
+#  updated_at  :datetime         not null
+#
+# Indexes
+#
+#  index_issue_assigners_on_assigner_id  (assigner_id)
+#  index_issue_assigners_on_issue_id     (issue_id)
+#
+
+class IssueAssigner < ApplicationRecord
+  belongs_to :issue 
+  belongs_to :assigner, class_name: "User"
+end

app/models/user.rb

@@ -175,6 +175,8 @@ class User < Owner
   has_many :system_notifications, through: :system_notification_histories
   has_one :trace_user, dependent: :destroy
   has_many :feedbacks, dependent: :destroy
+  has_many :issue_assigners, foreign_key: :assigner_id
+  has_many :assigned_issues, through: :issue_assigners, source: :issue
   # Groups and active users
   scope :active, lambda { where(status: STATUS_ACTIVE) }
   scope :like, lambda { |keywords|

app/views/api/v1/issues/assigners/index.json.jbuilder

@@ -0,0 +1,4 @@
+json.total_count @assigners.total_count
+json.assigners @assigners.each do |assigner|
+  json.partial! 'api/v1/users/simple_user', locals: { user: assigner}
+end

db/migrate/20230207091507_create_issue_assigners.rb

@@ -0,0 +1,10 @@
+class CreateIssueAssigners < ActiveRecord::Migration[5.2]
+  def change
+    create_table :issue_assigners do |t|
+      t.references :issue
+      t.references :assigner, references: :user
+
+      t.timestamps
+    end
+  end
+end