A319 DIVERTS TWICE FOR FAILURE OF BOTH ENG DRIVEN GENERATOR AND APU.

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CLBING OUT OF PHL EXPERIENCED GENERATOR #2 FAULT ECAM; FOLLOWED ECAM PROC. STARTED APU AND SELECTED IT ON LINE TO PROVIDE 2ND ELECTRICAL PWR SOURCE. A FEW MINS LATER; WE GOT THE ECAM IDG LOW OIL PRESSURE. DISCONNECTED IDG PER ECAM PROC. 10 MINS LATER APU AUTO SHUTDOWN; LEAVING US WITH ONLY 1 REMAINING ELECTRICAL PWR SOURCE REQUIRING DIVERSION TO PIT WITH DISPATCH CONCURRENCE. ONCE IN PIT; CONTRACT MAINT; TRIED TO RECONNECT IDG; BUT FAILED TO DO SO. THEY ALSO FOUND A COUPLE OF RAGS IN THE APU! WE WERE THEN RELEASED WITH GENERATOR #2 INOP WHILE USING THE APU TO RUN AND PROVIDE ELECTRICAL PWR. HOWEVER; ABOUT 25 MINS AFTER TKOF; THE APU AUTO SHUT DOWN AGAIN AT FL320; WE DSNDED TO FL300 TO INCREASE THE START ABILITY; AND IT DID RELIGHT. HOWEVER; 5 MINS LATER IT AUTO SHUT DOWN AGAIN. AT THIS POINT WE WERE ONCE AGAIN DOWN TO 1 ELECTRICAL PWR SOURCE AND COORDINATED WITH DISPATCH AND DIVERTED WHERE WE GOT ANOTHER AIRPLANE AND CONTINUED ON TO DEST. WHILE WE WERE WAITING TO DEPART; 2 FLT MGRS APPEARED IN THE COCKPIT. THE 1 FLT MGR WANTED TO KNOW WHY WE DIVERTED FOR JUST LOSING OUR APU. THE MGR HAD NO KNOWLEDGE OF OUR GENERATOR #2 PROB; AND SHOULD HAVE RESEARCHED OUR PREVIOUS PROBS BEFORE ATTACKING OUR CREDIBLE AND REQUIRED (FAA AND SOP) REASON FOR DIVERTING.