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CakePHP: Modelling Employee Hierarchy

Posted on 2009-04-07
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Last Modified: 2013-11-10
Hi All,

How do I model a company's hierarchy? Each employee has zero or more managers and at the same time, might have zero or more employees reporting up to him/her.

Example: CEO --> Directors --> Managers--> Individual Contributors

Is this a HABTM relationship with one table ie. an employee belonging to many employees/having many employees?

Any help or direction would be aprpeciated.

Thanks.
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Question by:swfoo
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asianandrew earned 2000 total points
ID: 24094292
You can use a HABTM, but I've always had difficulty with recursion - ex: find all managers who belong to CEO.

If each employee only reports to 1 person (1 employee does not report to more than 1 manager), I'd recommend using a Modified Preorder Tree Transversal (MPTT) schema which would only require 1 table.

MPTT is a little difficult to grasp at first, but can be very powerful. For instance, I could easily find all employees who work for the CEO (Directors, Managers, Individuals), or I could find their first child (Directors) with ease.

Check out the following links:
http://bakery.cakephp.org/articles/view/modified-preorder-tree-traversal-component
http://www.sitepoint.com/article/hierarchical-data-database/

Hope this helps
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