I was just looking at the ZCatalog code to figure out how to programatically
add an index to a Catalog.  I figured out how to do that fairly easily,
but the code I was looking at has me a bit mystified.  The method
manage_addIndex is defined.  The form that you use through the
management interface to add an index has a submit button whose name
is manage_addIndex:method.  OK, that all looks like reasonable
magic (magic because I don't know exactly what happens when a button
gets marshalled as a method).

Here's the part I don't understand: the form's action is set to the
Catalog itself.  manage_addIndex expects the index name and type
as its first two parameters.  Where does the magic come from that
turns the form submission into a correct call to manage_addIndex?

Probably I'm missing something obvious, but I will appreciate any
aid in increasing my Zope Zen level here <grin>.


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