php - 将数组从 Controller 传递到模型 - codeigniter

Question

知道为什么这行不通吗？我正在获取用户设置的标签，并希望获取具有相同标签的其他用户的 ID。

Controller :

$this->load->model('tag_model');
            $data['usr_tags'] = $this->tag_model->get_home_tags($user_id);
            $tags = $this->tag_model->get_home_tags($user_id);
            $tag_array = $tags;
            $data['tag_users'] = $this->tag_model->get_tag_users($tag_array);

型号:

function get_tag_users($tag_array)
    {
            //$tag = array('item1','item2','item3');
            $tag = $tag_array;
            $query_str = 'SELECT DISTINCT user_id FROM tags WHERE tag IN ("'. implode('","', $tag) .'")';

            $query = $this->db->query($query_str);

            if($query->num_rows() > 0) {
                    foreach($query->result_array() as $tag_users) {
                            $data[] = $tag_users;
                    }
                    return $data;
            }else{
                    return false;
            }
    }

错误:

A PHP Error was encountered
Severity: Notice
Message: Array to string conversion
Filename: models/tag_model.php
Line Number: 20

Answer 1

Controller

$this->load->model('tag_model');
$data['usr_tags'] = $this->tag_model->get_home_tags($user_id);
$data['tag_users'] = $this->tag_model->get_tag_users($data['usr_tags']);

型号

function get_tag_users($tag_array)
{
    $tags=array();
    foreach($tag_array as $tag)
    {
        $tags[]= $tag['tag'];
    }
    $query_str = 'SELECT DISTINCT user_id FROM tags WHERE tag IN ('.implode(",", $tags).')';
    $query = $this->db->query($query_str);
    if($query->num_rows() > 0)
    {
        return $query->results();
    }
    else
    {
        return false;
    }
}

注意:您的 $data['tag_users'] 将包含另一个用户 ID 数组。