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POMySQL 5.5 Database design. Problem with friendly URLs approach
 

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  1. POMySQL 5.5 Database design. Problem with friendly URLs approach
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    <p>I have a maybe stupid question but I need to ask it :-)</p> <p>My Friendly URL (furl) database design approach is fairly summarized in the following diagram (<strong>InnoDB</strong> at <strong>MySQL 5.5</strong> used)</p> <p><img src="https://i.stack.imgur.com/8OYy2.png" alt="diagram"></p> <p>Each item will generate as many furls as languages available on the website. The furl_redirect table represents the controller path for each item. I show you an example:</p> <pre><code>item.id = 1000 item.title = 'Example title' furl_redirect = 'item/1000' furl.url = 'en/example-title-1000' furl.url = 'es/example-title-1000' furl.url = 'it/example-title-1000' </code></pre> <p>When you insert a new item, its furl_redirect and furls must be also inserted. The problem appears becouse of the (necessary) unique constraint in the furl table. As you see above, in order to get unique urls, I use the title of the item (it is not necessarily unique) + the id to create the unique url. That means the order of inserting rows should be as follow:</p> <pre><code>1. Insert item -- (and get the id of the new item inserted) ERROR!! furl_redirect_id must not be null!! 2. Insert furl_redirect -- (need the item id to create de path) 3. Insert furl -- (need the item id to create de url) </code></pre> <p>I would like an <strong>elegant solution</strong> to this problem, but I can not get it!</p> <p>Is there a way of getting the <strong>next AutoIncrement value</strong> on an InnoDB Table?, and is it recommended to use it? Can you think of another way to ensure the <strong>uniqueness of the friendly urls</strong> that is independent of the items' id? Am I missing something crucial?</p> <p>Any solution is welcome!</p> <p>Thanks!</p>
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