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regluit
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Add a few comments to explain how various parts of our bookloading process works

pull/1/head
Raymond Yee 2012-02-15 13:23:10 -08:00
parent 6466c4292f
commit b7f47bfee5
1 changed files with 13 additions and 0 deletions
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13
core/bookloader.py
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@ -128,11 +128,20 @@ def add_ebooks(item, edition):
def update_edition(edition): def update_edition(edition):
"""
attempt to update data associated with input edition and return that updated edition
"""
# if there is no ISBN associated with edition, just return the input edition
try: try:
isbn=edition.identifiers.filter(type='isbn')[0].value isbn=edition.identifiers.filter(type='isbn')[0].value
except models.Identifier.DoesNotExist: except models.Identifier.DoesNotExist:
return edition return edition
# do a Google Books lookup on the isbn associated with the edition (there should be either 0 or 1 isbns associated
# with an edition because of integrity constraint in Identifier)
# if we get some data about this isbn back from Google, update the edition data accordingly
results=get_google_isbn_results(isbn) results=get_google_isbn_results(isbn)
if not results: if not results:
return edition return edition
@ -149,11 +158,15 @@ def update_edition(edition):
# check for language change # check for language change
language = d['language'] language = d['language']
# don't track variants in main language (e.g., traditional vs simplified Chinese)
if len(language)>2: if len(language)>2:
language= language[0:2] language= language[0:2]
# if the language of the edition no longer matches that of the parent work, attach edition to the
if edition.work.language != language: if edition.work.language != language:
logger.info("reconnecting %s since it is %s instead of %s" %(googlebooks_id, language, edition.work.language)) logger.info("reconnecting %s since it is %s instead of %s" %(googlebooks_id, language, edition.work.language))
old_work=edition.work old_work=edition.work
new_work = models.Work(title=title, language=language) new_work = models.Work(title=title, language=language)
new_work.save() new_work.save()
edition.work = new_work edition.work = new_work