[Bugs] #1590 UNSP: Make timestamp retrieval in Journal more robust

[Sugar Labs Bugs]

#1590: Make timestamp retrieval in Journal more robust
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    Reporter:  sayamindu                  |          Owner:  alsroot          
        Type:  defect                     |         Status:  assigned         
    Priority:  Unspecified by Maintainer  |      Milestone:  0.90             
   Component:  sugar                      |        Version:  Git as of bugdate
    Severity:  Major                      |       Keywords:  r-               
Distribution:                             |   Status_field:  New              
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Changes (by sascha_silbe):

  * distribution:  Unspecified =>
  * status_field:  Unconfirmed => New
  * severity:  Unspecified => Major
  * version:  Unspecified => Git as of bugdate
  * milestone:  Unspecified by Release Team => 0.90


Comment:

 Here's another place that will break if timestamp is a float. Triggered
 this while importing data store entries from Sugar 0.82.1 (OLPC Build
 801):

 {{{
 Traceback (most recent call last):
   File "/home/sascha.silbe/sugar-jhbuild/install/lib/python2.6/site-
 packages/jarabe/journal/listmodel.py", line 142, in on_get_value
     timestamp = int(metadata.get('timestamp', 0))
 ValueError: invalid literal for int() with base 10: '1283202926.51'
 }}}

 #2208 is related (breakage on parsing the ctime property).

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Ticket URL: <http://bugs.sugarlabs.org/ticket/1590#comment:6>
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