[Zope] - Q on product development

[Janko Hauser]

So, one step further, with the new Beta everything went fine. Started
to build a new product.

Outline: Want to build a Gallery, where owners can add
postscript-pictures with some comment. A thumbnail is generated and a
page with thumbnail and comment is displayed. The thumbnail is a link
to the actual Postscript picture. A Gallery can include other
Galleries to collect pictures for different topics. This will be a
subclass of a Folder.

As this product should be used by many different users, I don't want
to fill up the database with all this pictures. So I want to make an
object, which acts like a file, but stores only a link to an external
file. 

Subclassing File and overwriting PData -> ready is the BLOB. 

Q1: Is there already something like this in Zopeland? This could also
be used to make dataviewers for big (GB) datafiles.

Q2: I can delete the object from the POS, but how do I delete also the 

external file? Is there some hook I can use?

Q3: The development of a package is quite time consuming, because I
need to delete the product, restart the server and add the object
again. Can this be done faster? How are other people developing
packages? Are all writing bug free code :-)?

Q4: Would it be easier to build soemthing like this as external
methods? I see now, that it is easier, but than I need to implement my 

own upload scheme and so on. (This are some of the benefits of a
product, all the predefined protocolls, right?)

Q5: If I want to extent the gallery with some functions, can these be
coded as external methods and added to the Gallery object? I have
tried it, but a BLOB object, which is only one class of the product
does not get the method (defined by def method(self,...): ) 

Q6: If more and more packages are developed the security screen
becomes rather big. How will this be handled in the future?

Thanks for any help and insight you can provide

__Janko Hauser