[英]How to use dbforge[of codeigniter] to add foreign key
I am using codeigniter and I am trying to convert following query into dbforge style query, how can I do it? 我正在使用codeigniter而我正在尝试将以下查询转换为dbforge样式查询,我该怎么办?
create table filter (
filterid int primary key auto_increment,
filtername varchar(50) not null,
categoryid int not null,
isactive tinyint not null,
sequence int not null,
foreign key(categoryid) references category(id));
Here are 4 ways to do that. 以下是4种方法。 The first three work with create_table and the fourth one can be done when adding a field later.
前三个使用create_table和第四个可以在以后添加字段时完成。
$this->dbforge->add_field('id INT NOT NULL AUTO_INCREMENT PRIMARY KEY');
$this->dbforge->add_field('CONSTRAINT FOREIGN KEY (id) REFERENCES table(id)');
$this->dbforge->add_field('INDEX (deleted)');
$this->dbforge->add_column('table',[
'COLUMN id INT NULL AFTER field',
'CONSTRAINT fk_id FOREIGN KEY(id) REFERENCES table(id)',
]);
Use $this->db->query();
使用
$this->db->query();
instead. 代替。
This always works for me.... 这总是对我有用....
$sql="create table filter (
filterid int primary key auto_increment,
filtername varchar(50) not null,
categoryid int not null,
isactive tinyint not null,
sequence int not null,
foreign key(categoryid) references category(id))";
$this->db->query($sql);
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.