Migrating a substanceD zodb database to postgres

Hi, so I have been tasked with migrating our data.fs to a postgres 
database,the file was created from a substanceD scaffold application.

If I open it from within my substanceD application then I can see all the 
objects and I can see all the references using objectmap and a dump script 
is relatively trivial (!)

I would however like to have a separate python application to open the 
data.fs, read out the properties of the objects and save them to postgres. 
I have my django app (department standard now:)) and I have zodb and 
substanced installed in the virtual environment.

 I get objects with __Broken_state and that's all fine as I know the 
properties of the objects and I can just iterate through the folders and 
read them off. However - I am not easily able to sort out the references. 
In substanceD, the references are not stored on the objects they are 
connecting but on something called the objectmap. I can get an instance of 
objectmap class in my new code but none of the methods work as they are all 
expecting full information about the objects rather than broken ones.

So, I probably need to install more of my original substanceD project - 
exactly how much do  you think I will need so the objects aren't actually 
broken?  

Yours hopefully 

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