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Alex Williams http://www.alexwilliams.ca

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HABTM relationship MySQL tables for use in Rails

This is an example of the tables I create when I want to have an HABTM relationship between 2 tables:
Table 1: products
Table 2: tags

DROP TABLE IF EXISTS `products_tags`;
DROP TABLE IF EXISTS `tags`;
DROP TABLE IF EXISTS `products`;

CREATE TABLE `products` (
  `id` int(11) NOT NULL auto_increment,
  `title` varchar(100) NOT NULL,
  `price` decimal(10,2) NOT NULL,
  PRIMARY KEY  (`id`)
)

CREATE TABLE `tags` (
  `id` int(11) NOT NULL auto_increment,
  `title` varchar(64) NOT NULL,
  PRIMARY KEY  (`id`)
)

CREATE TABLE `products_tags` (
  `product_id` int(11) NOT NULL default '0',
  `tag_id` int(11) NOT NULL default '0',
  PRIMARY KEY  (`product_id`,`tag_id`)
)


to rails mysql database habtm by alexwilliams on Dec 19, 2006
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