在WHERE CLAUSE

Question

我的where子句有两个条件，我正在数组中编写它。以下是到目前为止的代码：

public function getRelatedNews($id, $news_id) {

    $args = array(
        'fields' => array(
            'news.id', 
            'news.title',  
            'news.story', 
            'news.image',
            'news.status',
            'news.added_date',
            'categories.title AS news_category',
            '(SELECT users.full_name FROM users WHERE id = news.added_by) as author',
            ),
        'where' => array(
            'news_category' => $id
            'news.id'    !=> $news_id 
        ),
        'join'  => 'LEFT JOIN categories on news.news_category = categories.id',
        'limit' => array(0, 2)
    );
    return $this->select($args);
}

当我在数组中写入条件时，我将=>用于相等，但对于第二个条件，我将无法使用!=>。如果它们不像上面那样在数组中，我应该对不相等的条件使用什么？

我有SELECT这样的查询：

final protected function select($args = array(), $is_die = false){
        try {

        $this->sql = "SELECT ";
        if (isset($args['fields'])) {
            if (is_array($args['fields'])) {
                $this->sql .= implode(', ', $args['fields']);
            } else {
                $this->sql .= $args['fields'];
            }
        } else {
            $this->sql .= " * ";
        }
        $this->sql .= " FROM ";
        if (!isset($this->table) || empty($this->table)) {
            throw new Exception("Table not set");
        }
        $this->sql .= $this->table;

        /*Join Query*/
        if (isset($args['join']) && !empty($args['join'])) {
            $this->sql .= " ".$args['join'];
        }
        /*Join Query*/

        if (isset($args['where']) && !empty($args['where'])) {
            if (is_array($args['where'])) {
                $temp = array();
                foreach ($args['where'] as $column_name => $value) {
                    $str = $column_name." = :".$column_name;
                    $temp[] = $str;
                }
                $this->sql .= " WHERE ".implode(' AND ', $temp);
            } else {
                $this->sql .= " WHERE ".$args['where'];
            }
        }

        /*Group*/
        if (isset($args['group_by']) && !empty($args['group_by'])) {
            $this->sql .= " GROUP BY ".$args['group_by'];
        }
        /*Group*/

        /*Order*/
        if (isset($args['order_by']) && !empty($args['order_by'])) {
            $this->sql .= " ORDER BY ".$args['order_by'];
        } else {
            $this->sql .= " ORDER BY ".$this->table.".id DESC";
        }
        /*Order*/

        /*Limit*/
        if (isset($args['limit']) && !empty($args['limit'])) {
            if (is_array($args['limit'])) {
                $this->sql .= " LIMIT ".$args['limit'][0].",".$args['limit'][1];
            } else {
                $this->sql .= " LIMIT ".$args['limit'];
            }
        }
        /*Limit*/
        $this->stmt = $this->conn->prepare($this->sql);
        if (isset($args['where']) && !empty($args['where']) && is_array($args['where'])) {
            foreach ($args['where'] as $column_name => $value) {
                if (is_int($value)) {
                    $param = PDO::PARAM_INT;
                } elseif (is_bool($value)) {
                    $param = PDO::PARAM_BOOL;
                } elseif (is_null($value)) {
                    $param = PDO::PARAM_NULL;
                } else {
                    $param = PDO::PARAM_STR;
                }
                if ($param) {
                    $this->stmt->bindValue(":".$column_name, $value, $param);
                }
            }
        }
        if ($is_die) {

            echo $this->sql;
            debugger($this->stmt);

        }
        $this->stmt->execute();

        $data = $this->stmt->fetchAll(PDO::FETCH_OBJ);

        return $data;

        } catch (PDOException $e) {
                error_log(
                    date('Y-m-d h:i:s A').", Select Query: ".$e->getMessage()."\r\n"
                    , 3, ERROR_PATH.'/error.log');
                return false;
            } catch (Exception $e) {
                error_log(
                    date('Y-m-d h:i:s A').", General: ".$e->getMessage()."\r\n"
                    , 3, ERROR_PATH.'/error.log');
                return false;
            }
    }

Answer 1

要反映我的评论，请将您的数据结构更改为此：

public function getRelatedNews($id, $news_id) {
    $args = array(
        'fields' => array(
            'news.id', 
            'news.title',  
            'news.story', 
            'news.image',
            'news.status',
            'news.added_date',
            'categories.title AS news_category',
            '(SELECT users.full_name FROM users WHERE id = news.added_by) as author',
        ),
        'where' => array(
            'news_category' => $id
            'news.id'       => array('value' => $news_id, 'operator' => '!=', ), 
        ),
        'join'  => 'LEFT JOIN categories on news.news_category = categories.id',
        'limit' => array(0, 2)
    );
    return $this->select($args);
}

现在，您仍然必须根据新数据更改select方法。

foreach ($args['where'] as $column_name => $data) {
    /**
        Transform to array when only value is passed
        Use default operator = when this is the case
    **/
    if (!is_array($data)) {
        $data = array(
            'value'     => $data,
            'operator'  => '=',
        );
    }
    $str = $column_name.' '.$data['operator'].' :'.str_replace('.', '_', $column_name);
    $temp[] = $str;
}

并更改值绑定：

foreach ($args['where'] as $column_name => $data) {
    $value = is_array($data) ? $data['value'] : $data; //check if passed where statement was an array, fetch value if so
    if (is_int($value)) {
        $param = PDO::PARAM_INT;
    }elseif (is_bool($value)) {
        $param = PDO::PARAM_BOOL;
    }elseif (is_null($value)) {
        $param = PDO::PARAM_NULL;
    }else {
        $param = PDO::PARAM_STR;
    }
    if ($param) {
        $this->stmt->bindValue(":".str_replace('.', '_', $column_name), $value, $param);
    }
}

Answer 2

您需要像这样使用您的助手

public function getRelatedNews($id, $news_id) {

    $args = array(
        'fields' => array(
            'news.id', 
            'news.title',  
            'news.story', 
            'news.image',
            'news.status',
            'news.added_date',
            'categories.title AS news_category',
            '(SELECT users.full_name FROM users WHERE id = news.added_by) as author',
            ),
        'where' => array(
            'news_category' => $id
            'news.id !=' => $news_id 
        ),
        'join'  => 'LEFT JOIN categories on news.news_category = categories.id',
        'limit' => array(0, 2)
    );
    return $this->select($args);
}

Answer 3

您当前有！=>，如果您不希望等于==