初始化项目：添加后端代码、ThinkPHP框架、前端资源
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<?php
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namespace app\admin\model\course;
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use think\Model;
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use app\admin\model\course\Course;
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class ColumnBind extends Model
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{
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// 表名
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protected $name = 'course_bind_column';
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// 自动写入时间戳字段
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protected $autoWriteTimestamp = 'integer';
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// 定义时间戳字段名
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protected $createTime = 'createtime';
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protected $updateTime = false;
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protected $deleteTime = false;
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// 追加属性
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protected $append = [
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];
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public function course()
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{
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return $this->belongsTo('Course', 'course_id', 'id', [], 'right')->setEagerlyType(0);
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}
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/**
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* 专栏绑定的课程
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* 考虑绑定类型可能还有目录
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* @return mixed
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*/
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public function bindcourse()
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{
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return $this->belongsTo('Course', 'course_id', 'id', [], 'left')->setEagerlyType(0);
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}
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/**
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* 内容绑定专栏
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* @param $courseId 内容ID
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* @param $column 专栏
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* @return void
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*/
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public function setCourseBindColumn($courseId,$columns){
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$columnIds = [];
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if($columns){
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foreach ($columns as $column){
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$columnIds[] = $column['id'];
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}
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}
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$courseBindColumnIds = $this->getCourseBindColumnIds($courseId);
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//判断已经绑定的专栏列表 是不是在这次更新的列表中，不在则删除
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if(!empty($courseBindColumnIds)){
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foreach ($courseBindColumnIds as $columnId){
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if(!in_array($columnId,$columnIds)){
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self::where([
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'column_id'=>$columnId,
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'course_id'=>$courseId,
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])->delete();
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}
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}
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}
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if(!empty($columnIds)){
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foreach ($columnIds as $columnId){
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$this->setColumnBindCourse($columnId,[$courseId]);
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}
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}
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}
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/**
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* 获取内容绑定的专栏
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* @param $courseId
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* @return array
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*/
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public function getCourseBindColumn($courseId){
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$CourseModel = new \app\admin\model\course\Course();
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$ids = $this->getCourseBindColumnIds($courseId);
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return $CourseModel->where('id','in',$ids)->field(['id','name','createtime'])->select();
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}
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/**
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* 获取内容绑定的专栏ID
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* @param $courseId
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* @return array
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*/
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public function getCourseBindColumnIds($courseId){
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$columnIds = self::where(['course_id'=>$courseId])->field('column_id')->select();
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if(!$columnIds){
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return [];
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}
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$ids = [];
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foreach ($columnIds as $id){
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$ids[] = $id['column_id'];
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}
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return $ids;
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}
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/**
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* 绑定内容
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* @param $columnId
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* @param $courseIds
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* @param $dir
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* @return bool
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*/
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public function setColumnBindCourse($columnId,$courseIds,$p_id = 0,$type = 1,$title = ''){
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$bindCourseId = $this->getBindCourseId($columnId);
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//获取专栏已经绑定过的课程，如果需要被绑定的课程不再已经绑定的列表中，则添加
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if(!empty($courseIds)){
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foreach ($courseIds as $item){
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if(!in_array($item,$bindCourseId)){
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$row = [
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'course_id'=>$item,
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'column_id'=>$columnId,
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'try'=>0,
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'type'=>$type,
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'title'=>$title,
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'p_id'=>$p_id,
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'uniacid'=>UNIACID,
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'createtime'=>time(),
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];
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$row['sort']=$this->defineSort($columnId,$p_id);
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//改变课程的sales_type
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$courseInfo = Course::where([
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'id'=>$item
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])->field("sales_type")->find();
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if($courseInfo){
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$salesType = json_decode($courseInfo['sales_type'],true);
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if(!in_array("column",$salesType)){
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$salesType[] = "column";
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}
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Course::where([
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'id'=>$item
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])->update([
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'sales_type'=>json_encode($salesType)
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]);
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}
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self::insert($row);
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}
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}
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}
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return true;
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}
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/**
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* 获取绑定的内容ID
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* @param $columnId
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* @return mixed
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*/
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public function getBindCourseId($columnId){
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$list = self::where([
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'column_id'=>$columnId,
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'type'=>1
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])->field('course_id')->select();
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$ids = [];
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if(!empty($list)){
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foreach ($list as $item){
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$ids[] = $item['course_id'];
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}
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}
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return $ids;
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}
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/**
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* 获取新绑定项的排序值
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* 根据专栏（Course）配置的 column_update 决定新条目落在同层的头部还是尾部：
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* - column_update = 'desc'：最近添加的在前 → 取同层 min(sort) - 1
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* - column_update = 'asc' 或未设置：最近添加的在后 → 取同层 max(sort) + 1
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* @param int $columnId 专栏ID（tuzhi_course.id）
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* @param int $p_id 上级目录ID
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* @return int
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*/
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public function defineSort($columnId,$p_id = 0){
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//读取专栏的更新顺序配置
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$columnUpdate = Course::where(['id'=>$columnId])->value('column_update');
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$columnUpdate = $columnUpdate === 'desc' ? 'desc' : 'asc';
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if($columnUpdate === 'desc'){
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//最近添加的在前：排到同层最前面
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$minItem = self::where([
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'column_id'=>$columnId,
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'p_id'=>$p_id
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])->field("sort")->order("sort asc")->find();
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if(!$minItem){
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return 0;
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}
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return (int)$minItem['sort'] - 1;
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}
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//最近添加的在后：排到同层最后面
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$maxItem = self::where([
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'column_id'=>$columnId,
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'p_id'=>$p_id
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])->field("sort")->order("sort desc")->find();
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if(!$maxItem){
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return 0;
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}
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return (int)$maxItem['sort'] + 1;
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}
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}
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