StackOverflow2013

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15281536
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2013-03-07T20:54:53.320
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2013-03-13T15:58:16.277
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2013-03-13T15:58:16.277
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1704242
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15201769
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2
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7
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text
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Actually, the problem is that if <code>isNewRecord</code> is always true, it means that Yii is going to use an <code>INSERT</code> statement instead of an <code>UPDATE</code> statement when saving the model to the database.. that is why you always get the duplicate pk error, even if it's composite. <a href="http://www.yiiframework.com/doc/api/1.1/CActiveRecord#getIsNewRecord-detail" rel="nofollow">Here</a> is the official documentation about <code>IsNewRecord</code> . So, the problem is that you're using <pre><code>$userCategory = new UserCategory; //Always a new record, tries to INSERT </code></pre> So to resolve this you have to find the record and evaluate if it is found before saving it, instead. Documentation can also be read <a href="http://www.yiiframework.com/doc/api/1.1/CActiveRecord#find-detail" rel="nofollow">Here</a> about the <code>find()</code> family of methods and their return value, the return values of the find() methods vary slightly on their nature: <blockquote> find..() returns the record found or <code>NULL</code> if no record is found. findAll..() returns an array containing all the records found or an empty array if no records are found. </blockquote> You can use this return value to differentiate wether a primary key exists or not: <pre><code>$userCategory = UserCategory::model()->findByAttributes(array('user_id '=>1,'category_id '=>15)); // if user does not exist, you need to create it if ($userCategory == NULL) { $userCategory = new UserCategory; $userCategory->user_id = 1; $userCategory->category_id = 15; } echo $userCategory->isNewRecord; //you will see the difference if it does exist or not exist $userCategory->last_access = Now(); $userCategory->save(); </code></pre> This will ensure that the framework uses the INSERT or UPDATE statement correctly, avoiding the duplicate PK error you're getting. Edit: Enhanced the example code to properly populate the record when it's new.
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