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    <p>Well, I use <a href="http://www.yiiframework.com/" rel="nofollow">Yii framework</a> with its nice RBAC layer. I'm not too familiar with ACLs, nor did I need to be, lately.</p> <p>In Yii RBAC terms, your key to the solution is using 'business rules'. Bizrules are small snippets of code that are attached to a 'permission' or a 'role' (an 'auth item' in Yii's terms). This code is run dynamically when the need to determine access to a certain 'permission' (lets say, but it could also be attached to a 'role'), and it recieves the 'item in question' (task in your example) and determine actual access to the specific task or not. Here's a more detailed example:</p> <ul> <li>say you need to have the following permissions: <ul> <li>Edit task (which should be allowed to anyone with the role 'tasks administrator')</li> <li>Edit own tasks (which should be allowed to the person who submitted <em>this</em> task).</li> </ul></li> <li>Now, in the 'task edit' code section, you would first check for 'edit task' permission. if ok - allow.</li> <li>if wasn't allowed, also check for 'edit own task' (using else-if construct). Now on the last mentioned permission there should be attached a bizrule (=php code) that accepts a 'task' object and compares its 'creator id' to the 'currently checked user id'. If equal, it returns true, meaning access should be granted.</li> </ul> <p>That's in a nutshell. If you're interested in more, see <a href="http://www.yiiframework.com/doc/guide/1.1/en/topics.auth#role-based-access-control" rel="nofollow">this section</a> of the official guide. There are also a bunch of other resources, should you need.</p>
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    1. POComplex Righty System: ACL, RBAC and more what?
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    1. USBoaz Rymland
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    1. COThank you for your answer. From my understanding those business rules are what I would call "filtering in application code", which does not solve my problem. I would make a query to retrieve the tasks (25) and then maybe some results are filtered out by the business rule. Then I would need to make another call to the DB and filter again until I can return 25 results. That is not very good in my opinion. In my mind I would want to apply the business rules to the SQL query and retrieve 25 results right away.
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    2. COThis question is tagged with PHP. Can you shed light on what framework/library you're building on top, if any, if decided? It can make the discussion more fruitful... .
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    3. COWe will be using ZF2. ZF2/ACL and ZfcRbac as the modules. But I guess PHP might be the wrong tag?
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