def __init__(
self,
latitude=None,
longitude=None,
bbox_width=None,
bbox_height=None,
line1=None,
line2=None,
line3=None,
city=None,
country=None,
postal_code=None,
state=None,
):
self.latitude = latitude
self.longitude = longitude
self.bbox_width = bbox_width
self.bbox_height = bbox_height
self.line1 = xstr(line1)
self.line2 = xstr(line2)
self.line3 = xstr(line3)
self.city = xstr(city)
self.country = xstr(country)
self.postal_code = xstr(postal_code)
self.state = xstr(state)
self.id = self.identifier()
def location_dict_yelp(loc):
location = {
'latitude':loc['coordinate']['latitude'],
'longitude':loc['coordinate']['longitude'],
'line1':xstr(loc['address'][0]),
'line2':xstr(loc['address'][1]),
'line3':xstr(loc['address'][2]),
'city':xstr(loc['city']),
'country':xstr(loc['country']),
'postal_code':xstr(loc['postal_code']),
'state':xstr(loc['state']),
}
if location['latitude'] is not None:
location['bbox_width'] = 0
location['bbox_height'] = 0
else:
location['bbox_width'] = None
location['bbox_height'] = None
location['id'] = location_id(location)
return location
def upsert_yelpfile_to_db(filename, geocode=True):
"""
This takes in the JSON file of all of the Yelp businesses and
all the affiliate data (reviews, categories, etc.) and upserts them to the DB
It follows the db schema used by the ORM, but doesn't use the ORM directly
for optimization purposes.
Where the ORM would take a week or more (estimated) to upload
a completely new file of 35k businesses,
this version does so in ~= 45 min (w/o geocode and over ethernet)
DON'T mess with this code unless you know what you're doing.
Hopefully it's well commented enough for you to figure it out if you need to.
But it is sensitive (relative to normal model code) because of the amount of
data that must be transferred to the DB.
Args:
filename: the name of the unzipped Yelp JSON filename
geocode: whether or not to geocode locations missing a Lat/Lon
- Can slow down the code significantly if it's the first geocode attempt
- Most Yelp locations don't have Lat/Lons
- On first upload consider calling the geocode db function after
Returns:
None. But the database will be updated :)
TODO:
- Add a geocode unkown locations function
- Check if syndication has already been uploaded today
"""
# database handler object
db = get_db_session(echo=False, autoflush=False, autocommit=True)
# check YelpDownloadHistory to see if we've already uploaded the feed
ydh = db.query(YelpDownloadHistory).filter(YelpDownloadHistory.date==date.today()).scalar()
# if it doesn't exist, isnt today, hasn't been downloaded or unzipped
if not ydh or not ydh.date == date.today() or not ydh.downloaded or not ydh.unzipped:
logger.critical("Can't upload today's feed if it hasn't been downloaded and unzipped")
return
if ydh.uploaded:
logger.info("Already upserted today's Yelp feed. Skipping")
return
# geocoder for businesses w/o lat longs
geoLocator = Nominatim()
logger.info("Updating Yelp DB..........")
# setup list of businesses to skip updating
# because we've uploaded them since yelp updated them
# this part gets the skip condition
newest = db.query(Business).order_by(desc(Business.updated_at)).first()
# check for if there's a business in the db
if newest:
most_recent = newest.updated_at
init_db = False
logger.info("Last updated: %r" % most_recent.strftime('%m/%d/%Y:%M:%H:%S'))
# if not, then it's the first time we're populating it
else:
logger.info("First Database Population: This could take a looong time...")
most_recent = None
init_db = True
# if we're initializing the db, disable the foreign key constraints
# this will improve upload speeds
if init_db and 'mssql' in dbconfig['dbbackend']:
disable_fk = """
ALTER TABLE dbo.%s NOCHECK CONSTRAINT fk_loc_businesses;
ALTER TABLE dbo.%s NOCHECK CONSTRAINT fk_biz_id;
ALTER TABLE dbo.%s NOCHECK CONSTRAINT fk_cat_alias;
ALTER TABLE dbo.%s NOCHECK CONSTRAINT fk_rev_biz_id;
""" % ( businesses.name, business_category_table.name,
business_category_table.name, yelp_reviews.name)
with db.begin():
db.execute(disable_fk)
start_time = time.time() # for timing the whole process
# get sets of uids for each data model,
# so we can quickly determine if a datum needs to be updated or inserted
# this is much faster than querying the db every time
with db.begin():
db_biz_ids = set([ b.id
for b in db.query(Business.id).all() ])
db_review_ids = set([ r.id
for r in db.query(YelpReview.id).all() ])
db_locations = set([ l.id
for l in db.query(Location.id).all() ])
db_categories = set([ c.alias
for c in db.query(YelpCategory.alias).all() ])
db_biz_categories = set([ (assoc.business_id, assoc.category_alias)
for assoc in db.query(business_category_table).all()])
# batch upsert data structures
unloaded_locations = {}
unloaded_categories = {}
insert_businesses = []
insert_reviews = []
insert_documents = []
insert_doc_associations = []
update_businesses = []
update_reviews = []
update_documents = []
biz_cats = []
# loop over json file ans upsert all data
with open(filename, 'rb') as infile: # for unzipped files
biz_num = 0
biz_count = 0
review_count = 0
upload_mod = 500 # size of batch upload
# each business is one line
for line in infile:
biz_num += 1
biz_count +=1
logger.info("Updating Restaurant #%i...." % biz_num)
current = time.time()-start_time
m, s = divmod(current, 60)
h, m = divmod(m, 60)
logger.info("Time so far: %d:%02d:%02d" % (h, m, s))
# if business doesn't load correctly, skip it
try:
biz = loads(line)
except ValueError:
logger.warning("Broken JSON Element. Skipping...")
continue
bdate = datetime.strptime(biz['time_updated'], '%Y-%m-%dT%H:%M:%S')#2015-10-08T20:17:50
# skip this business if it hasn't ben updated since we last updated
# (only works when we aren't initializing the db)
if most_recent and not init_db:
if bdate <= most_recent:
logger.info("SKIPPING (NOT NEW): %s" % biz['name'])
biz_count -=1
# print biz_count
continue
# make note of new Locations
location = location_dict_yelp(biz['location'])
if location['id'] not in db_locations and location['id'] not in unloaded_locations.keys():
if not location['latitude'] and not location['longitude'] and geocode:
# try to reverse-geocode missing coords (if enabled)
if geocode:
try:
logger.info("No Lat/Long for restaurant, attempting to geocode...")
# TODO(shao): replace with foursquare geocoder
raise Exception('geocode not implemented')
except:
logger.warning("Geocode failed, assigning NULL Lat/Long")
# add to running list of unloaded locations
unloaded_locations[location['id']] = location
# update or insert business depending on if it's already in db
business = business_yelp_dict(biz, location)
if biz['id'] in db_biz_ids:
update_businesses.append(business)
else:
insert_businesses.append(business)
# update/create all the new Reviews
for i, rev in enumerate(biz['reviews']):
# if the review isn't new, don't do anything
# uncomment this code to update it (significant slowdown)
if rev['id'] in db_review_ids:
pass
# review = review_dict_yelp(biz, rev)
# document = document_dict_yelp(rev)
# update_reviews.append(review)
# update_documents.append(document)
# else create a new one
else:
review = review_dict_yelp(biz, rev)
document = document_dict_yelp(rev)
doc_assoc = doc_assoc_dict_yelp(rev)
insert_reviews.append(review)
insert_documents.append(document)
insert_doc_associations.append(doc_assoc)
review_count += len(biz['reviews'])
# create the Categories
for category in biz['categories']:
# if it's new create it, provided we haven't already
if (category['alias'] not in db_categories
and category['alias'] not in unloaded_categories.keys()):
# some aliases are bad, so skip them
if (xstr(category['alias']) == ''
or xstr(category['alias']) == None):
logger.warning("BAD CATEGORY %r... Skipping" % xstr(category['alias']))
continue
cat = {'alias':xstr(category['alias']),
'title':xstr(category['title'])
}
unloaded_categories[category['alias']] = cat
# create the business association link
assoc = {
'business_id':biz['id'],
'category_alias':category['alias']
}
if (assoc['business_id'], assoc['category_alias']) not in db_biz_categories:
biz_cats.append(assoc)
# if we've reached batch size, perform the actual transactions
if biz_count % upload_mod == 0:
with db.begin():
logger.info("Uploading Batch of %i to DB...." % upload_mod)
logger.info("Uploading Locations to DB....")
db.bulk_insert_mappings(Location, unloaded_locations.values())
logger.info("Uploading Yelp Categories to DB....")
db.bulk_insert_mappings(YelpCategory, unloaded_categories.values())
bizlen = len(insert_businesses) + len(update_businesses)
logger.info("Uploading %i Businesses to DB...." %bizlen)
db.execute(businesses.insert(), insert_businesses)
db.bulk_update_mappings(Business, update_businesses)
revlen = len(insert_reviews) + len(update_reviews)
logger.info("Uploading %i Documents to DB...." % revlen)
db.execute(document_associations.insert(), sorted(insert_doc_associations, key=lambda x:x['assoc_id']))
db.execute(documents.insert(), sorted(insert_documents, key=lambda x:x['id']))
# db.bulk_update_mappings(Document, update_documents)
logger.info("Uploading %i Business Reviews to DB...." % revlen)
db.execute(yelp_reviews.insert(), sorted(insert_reviews, key=lambda x:x['id']))
# db.bulk_update_mappings(YelpReview, update_reviews)
#there seem to be duplicate categories for a business
#so make the associations unique
logger.info("Uploading Business Category associations to DB....")
biz_cats = [dict(tupleized) for tupleized in set(tuple(assoc.items()) for assoc in biz_cats)]
db.execute(business_category_table.insert(), biz_cats)
# reset the lists for the next batch
db_categories.update(unloaded_categories.keys())
db_locations.update(unloaded_locations.keys())
unloaded_categories = {}
unloaded_locations = {}
insert_businesses = []
insert_reviews = []
insert_documents = []
insert_doc_associations = []
update_businesses = []
update_reviews = []
update_documents = []
biz_cats = []
# upload the final batch
bizlen = len(insert_businesses) + len(update_businesses)
if bizlen > 0:
with db.begin():
logger.info("Uploading Batch of %i to DB...." % upload_mod)
logger.info("Uploading Locations to DB....")
db.bulk_insert_mappings(Location, unloaded_locations.values())
logger.info("Uploading Yelp Categories to DB....")
db.bulk_insert_mappings(YelpCategory, unloaded_categories.values())
bizlen = len(insert_businesses) + len(update_businesses)
logger.info("Uploading %i Businesses to DB...." %bizlen)
db.execute(businesses.insert(), insert_businesses)
db.bulk_update_mappings(Business, update_businesses)
revlen = len(insert_reviews) + len(update_reviews)
logger.info("Uploading %i Documents to DB...." % revlen)
db.execute(document_associations.insert(), sorted(insert_doc_associations, key=lambda x:x['assoc_id']))
db.execute(documents.insert(), sorted(insert_documents, key=lambda x:x['id']))
# db.bulk_update_mappings(Document, update_documents)
logger.info("Uploading %i Business Reviews to DB...." % revlen)
db.execute(yelp_reviews.insert(), sorted(insert_reviews, key=lambda x:x['id']))
# db.bulk_update_mappings(YelpReview, update_reviews)
#there seem to be duplicate categories for a business
#so make the associations unique
logger.info("Uploading Business Category associations to DB....")
biz_cats = [dict(tupleized) for tupleized in set(tuple(assoc.items()) for assoc in biz_cats)]
db.execute(business_category_table.insert(), biz_cats)
# if we are initializing the db, we need to reenable the fk constraints
# because we put in all the data correctly, we are sure the fks are correct
# this will error if they aren't
if init_db and 'mssql' in dbconfig['dbbackend']:
# put back all the constraints
logger.info("Cheking Constraints...")
enable_fk = """
ALTER TABLE dbo.%s CHECK CONSTRAINT ALL;
ALTER TABLE dbo.%s CHECK CONSTRAINT ALL;
ALTER TABLE dbo.%s CHECK CONSTRAINT ALL;
ALTER TABLE dbo.%s CHECK CONSTRAINT ALL;
""" % ( businesses.name, business_category_table.name,
business_category_table.name, yelp_reviews.name)
with db.begin():
db.execute(enable_fk)
total_time = float(time.time() - start_time)
logger.info("Upserted %i businesses and %i total reviews in %d seconds = %.2f minutes" %\
(biz_num, review_count, total_time, total_time/60.))
# update the download history
with db.begin():
ydh.uploaded = True
