Baron:
That is exactly what key names are for. You can write over the same
entity (it has to have the same key name to be the same entity), and
no harm done. Or, if the key doesn't exist, create the entity. The
put() does both.
thisEntity = thisModel.get_by_key_name('thisKey')
if not thisEntity:
thisEntity = thisModel(key_name='thisKey', trait1='hey',
trait2='there', etc.)
thisEntity.put()
else:
thisEntity.trait1 = 'changed to hello' (if you need to change
anything)
thisEntity.put()
If you put the records again, there will not be duplicates, as the
key_name is unique.
Bottom line: Don't make any model without creating an easy-to-
remember-and-call key_name. It will come in handy some day.
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