插入失敗：無法添加或更新子行：外鍵約束失敗

Question

我有兩個表 - 用戶和語言與他們的主鍵'id'的外鍵鏈接。 我已經檢查過，表的類型是innoDB。我有delete-限制和更新cascade。

此插入查詢，將其插入的語言表：（它可以是多行被添加作爲形式具有動態clickevent按鈕）

if(empty($_SESSION['user_id'])) { // user not logged in; redirect to somewhere else } 

$sql_insert = "INSERT into `language` 
(`native`,`other`,`other_list`,`other_read`, `other_spokint` 
,`other_spokprod`,`other_writ` ) 
VALUES 
('$native','$other','$other_list','$other_read','$other_spokint','$other_spokprod', 
'$other_writ') "; 

mysql_query($sql_insert,$link) or die("Insertion Failed:" . mysql_error());  
} 

這是完整的錯誤：

Insertion Failed:Cannot add or update a child row: a foreign key constraint fails 
(`members`.`language`, CONSTRAINT `language_ibfk_1` FOREIGN KEY (`id`) 
REFERENCES `users` (`id`)) 

任何幫助，將不勝感激！

爲表語言表結構：

CREATE TABLE IF NOT EXISTS `language` (
`id` bigint(20) NOT NULL AUTO_INCREMENT, 
`native` varchar(30) NOT NULL, 
`other` varchar(30) NOT NULL, 
`other_list` varchar(9) NOT NULL, 
`other_read` varchar(9) NOT NULL, 
`other_spokint` varchar(9) NOT NULL, 
`other_spokprod` varchar(9) NOT NULL, 
`other_writ` varchar(9) NOT NULL, 
    PRIMARY KEY (`id`) 
) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=3 ; 


RELATIONS FOR TABLE `language`: 
`id` 
`users` -> `id` 

Answer 1

你必須使用這樣的結構：

create table users (
    id int not null auto_increment, 
    <additional fields>, 

    primary key (id) 
) ENGINE=InnoDB; 


create table language(
    id int not null auto_increment, 
    user_id int not null, 
    <additional fields>, 

    primary key (id), 
    foreign key (user_id) references users(id) on delete restrict on update cascade 
) ENGINE=InnoDB;