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A function field is just like other fields with a function to calculate the value.<br />
<br />
It may look like this<br />
<br />

<pre><code id="code-20-38282233-1">'area': fields.function(_calculate_area, string='Area', type=&quot;float&quot;, store=True),</code></pre>
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In this case the <i>_calculate_area</i> is a function pointer and you should have that function in the same class.<br />
<br />
Here is a sample function (Please note that I assume you have width and height defined as float or integer field on the same model)<br />
<br />

<pre><code id="code-20-38282233-2">    def _calculate_are(self, cr, uid, ids, name, args, context=None):
        res = {}
        for object in self.browse(cr, uid, ids):
            area = object.width * object.height
            res[object.id] = area
        return res</code></pre>
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A function field is just like other fields with a function to calculate the value.

It may look like this



'area': fields.function(_calculate_area, string='Area', type="float", store=True),


In this case the _calculate_area is a function pointer and you should have that function in the same class.

Here is a sample function (Please note that I assume you have width and height defined as float or integer field on the same model)



    def _calculate_are(self, cr, uid, ids, name, args, context=None):
        res = {}
        for object in self.browse(cr, uid, ids):
            area = object.width * object.height
            res[object.id] = area
        return res

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That looks like Python. &nbsp;Which file would that go in? &nbsp;I only see XML files when editing the view.
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That looks like Python.  Which file would that go in?  I only see XML files when editing the view.

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Note: the python needs to be added to /opt/openerp/server/opener<wbr />p/addons/S<wbr />OMETHING/S<wbr />OMETHING.p<wbr />y
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Note: the python needs to be added to /opt/openerp/server/openerp/addons/SOMETHING/SOMETHING.py

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How do I create a functional field in OpenERP? &nbsp;For example, given an existing &quot;width&quot; and &quot;height&quot; fields, how would I create an &quot;area&quot; field that automatically calculates itself using the other two fields?
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How do I create a functional field in OpenERP?  For example, given an existing "width" and "height" fields, how would I create an "area" field that automatically calculates itself using the other two fields?

OpenERP Functional Field

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