mr_countries_with_no_restriction.then("u.country.name in :nrc_list")
mr_countries = c.new_map_reducer() # tori.db.mr.MapReducer
mr_countries.first(mr_countries_with_age_restriction) # First condition with the first compound map reducer.
mr_countries.if_not_then(mr_sub) # semantically means "OR" with the second compound map reducer.
mr = c.new_map_reducer() # tori.db.mr.MapReducer
mr.first(mr_countries)
mr.then("u.name not in :banned_list")
# Define the parameters
mr.define(
age=13,
arc_list=["United States", "Canada"],
nrc_list=["Japan", "Thailand"],
banned_list=banned_users_with_on_demand_filter, # Use the on-demand filter to use the multi-threading queries.
)
primary_criteria.map_reduce = mr # set the primary map reducer.
return user_repository.filter(primary_criteria)
mf = ManagerFactory()
mf.connect("mongodb://localhost/t3demo")
user_repository = mf.repository(User)
banned_user_repository = mf.repository(BannedUser)
print(query(user_repository, banned_user_repository))
class User(Entity):
def __init__(self, **attributes):
assert 'name' in attributes
for name in attributes:
self.__setattr__(name, attributes[name])
def query(user_repository):
primary_criteria = user_repository.new_criteria('u')
# to notify the criteria for possible sub queries.
primary_criteria.join('u.country', 'c')
mr = c.new_map_reducer() # tori.db.mr.MapReducer
mr.first('u.indice in :filtered_indice') # "indice" is a virtual property which is only allowed to used for query in Riak 1.4.x. When Riak 2.0 is released with a integrated Apache Solr, the query will be able to take a complex instruction.
# Define the parameters
mr.define(
filtered_indice = ['authorized']
)
primary_criteria.map_reduce = mr # set the primary map reducer.
return user_repository.filter(primary_criteria)
mf = ManagerFactory()
mf.connect('riak://localhost/')
user_repository = mf.repository(User)
print(query(user_repository))
