Use Tp to delete columns

I published an essay about deleting columns some time ago. The function implemented at that time was to delete a piece of information. This time I will implement batch deletion of columns.

What we need to achieve is the following effect:

After selecting the batch delete button, you can select all the columns of the page. This It is the implementation of the front-end page. I won’t go into details here. Let’s go directly to the topic: the batch deletion function.

1. There is also a small point here on the front-end page, that is, the name value of the selection box should be assigned an array of ids, and the value value is the id of the column.

2. We write a separate batch deletion method in the controller

public function privilege_bdel(){
        $ids = I('ids');
        $pri = D('privilege');
        $ids = implode(',', $ids);
        if($ids){
            if($pri->delete($ids)){
                $this->success('批量删除栏目成功！',U('Privilege/privilege_lst'));
            }else{
                $this->error('批量删除栏目失败，请重试！');
            }
        }else{
            $this->error('未选中任何内容，请重试！');
        }
    }

This is the result of our dumped options. This is also the basis for us to judge whether the deletion is a single deletion or a batch deletion. If options[where][id] is an array, it means that the deletion is in batches. Delete, otherwise it is a single delete.

3. Modify the constructor before deletion in the model

public function _before_delete($options){
        //批量删除
        if(is_array($options['where']['id'])){
            $arr = explode(',', $options['where']['id'][1]);
            $sonpri = array();
            foreach ($arr as $k => $v) {
                $sonpri2 = $this->childid($v);
                $sonpri = array_merge($sonpri,$sonpri2);
            }
            $sonpri = array_unique($sonpri);
            $chilrenids = implode(',', $sonpri);
        }else{//单个删除
            $chilrenids =$this->childid($options['where']['id']);
            $chilrenids = implode(',', $chilrenids);
        }
        if($chilrenids){
            $this->execute("delete from ed_privilege where id in($chilrenids)");
        }
    }

Convert the passed string into an array without commas and save it$ In arr, create an empty array $sonpri, and then traverse it with foreach. Here, first find all the sub-column IDs (the childid function will be used), store them in the $sonpri2 array, and then merge $sonpri and $sonpri2 into one array, using The array_merge() function is completed, so that we can obtain the IDs of all sub-columns, but there will be many duplicate IDs in the ID group we obtained, so here we also need to perform a duplication operation, using the array_unique() function . Finally, split the array again to get the id string, then delete it and you're done.

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