def _determine_backend(self):
from haystack import connections
# A backend has been manually selected. Use it instead.
if self._using is not None:
self.query = connections[self._using].get_query()
return
# No backend, so rely on the routers to figure out what's right.
hints = {}
if self.query:
hints['models'] = self.query.models
backend_alias = connection_router.for_read(**hints)
if isinstance(backend_alias, (list, tuple)) and len(backend_alias):
# We can only effectively read from one engine.
backend_alias = backend_alias[0]
# The ``SearchQuery`` might swap itself out for a different variant
# here.
if self.query:
self.query = self.query.using(backend_alias)
else:
self.query = connections[backend_alias].get_query()
def _determine_backend(self):
from haystack import connections
# A backend has been manually selected. Use it instead.
if self._using is not None:
self.query = connections[self._using].get_query()
return
# No backend, so rely on the routers to figure out what's right.
hints = {}
if self.query:
hints['models'] = self.query.models
backend_alias = connection_router.for_read(**hints)
if isinstance(backend_alias, (list, tuple)) and len(backend_alias):
# We can only effectively read from one engine.
backend_alias = backend_alias[0]
# The ``SearchQuery`` might swap itself out for a different variant
# here.
if self.query:
self.query = self.query.using(backend_alias)
else:
self.query = connections[backend_alias].get_query()
def _determine_backend(self):
# A backend has been manually selected. Use it instead.
using = self.original_kwargs.get("using", None)
if using is not None:
connection = connections[using]
else:
# No backend, so rely on the routers to figure out what's right.
hints = {"models": self.original_kwargs.get("models", None)}
backend_alias = connection_router.for_read(**hints)
connection = connections[backend_alias]
backend = connection.get_backend()
if not self.implementation:
if hasattr(connection,
"solr_paginator") and self.original_kwargs.get(
"group", "false") == "true":
self.implementation = connection.solr_paginator(
backend=backend, **self.original_kwargs)
elif hasattr(connection,
"solr_paginator") and self.original_kwargs.get(
"percent_score", False):
self.implementation = connection.solr_paginator(
backend=backend, **self.original_kwargs)
elif hasattr(connection,
"solr_paginator") and self.original_kwargs.get(
"json_facets", None):
self.implementation = connection.solr_paginator(
backend=backend, **self.original_kwargs)
else:
self.implementation = connection.paginator(
backend=backend, **self.original_kwargs)
self.backend = backend
def _determine_backend(self):
"""This is a hack somehow connection_router got wrong values
from setting and did not loaded the LanguageRouter"""
from haystack import connections, connection_router
# A backend has been manually selected. Use it instead.
if self._using is not None:
self.query = connections[self._using].get_query()
return
# No backend, so rely on the routers to figure out what's right.
hints = {}
if self.query:
hints["models"] = self.query.models
backend_alias = connection_router.for_read(**hints)
if isinstance(backend_alias, (list, tuple)) and len(backend_alias):
# We can only effectively read from one engine.
backend_alias = backend_alias[0]
# The ``SearchQuery`` might swap itself out for a different variant
# here.
if self.query:
self.query = self.query.using(backend_alias)
else:
self.query = connections[backend_alias].get_query()
def _determine_backend(self):
# A backend has been manually selected. Use it instead.
if self.using is not None:
self.backend = connections[self.using].get_backend()
return
# No backend, so rely on the routers to figure out what's right.
hints = {'models': self.models}
backend_alias = connection_router.for_read(**hints)
self.backend = connections[backend_alias].get_backend()
def _determine_backend(self):
# A backend has been manually selected. Use it instead.
if self._using is not None:
self.query = connections[self._using].get_query()
return
# No backend, so rely on the routers to figure out what's right.
hints = {}
if self.query:
hints['models'] = self.query.models
backend_alias = connection_router.for_read(**hints)
# The ``SearchQuery`` might swap itself out for a different variant
# here.
if self.query:
self.query = self.query.using(backend_alias)
else:
self.query = connections[backend_alias].get_query()
def _determine_backend(self):
# A backend has been manually selected. Use it instead.
if self._using is not None:
return self._using
# No backend, so rely on the routers to figure out what's right.
from haystack import connections
hints = {}
if self.query:
hints['models'] = self.query.models
backend_alias = connection_router.for_read(**hints)
# The ``SearchQuery`` might swap itself out for a different variant
# here.
if self.query:
self.query = self.query.using(backend_alias)
else:
self.query = connections[backend_alias].get_query()
def basic_search(source, target, language, start=0, rows=10, stopword_list=None):
if language != 'latin':
raise Exception('Only latin is supported for now. Sorry.')
conn_alias = connection_router.for_read()
if isinstance(conn_alias, (list, tuple)) and len(conn_alias):
# We can only effectively read from one engine
conn_alias = conn_alias[0]
hs_info = settings.HAYSTACK_CONNECTIONS[conn_alias]
solr_url = hs_info['URL']
get_params = {
'wt': 'python', # bitchin
'tess.sq': 'volume_id:{0}'.format(source.id),
'tess.sf': 'text',
'tess.sfl': 'volume,author,text,title',
'tess.tq': 'volume_id:{0}'.format(target.id),
'tess.tf': 'text',
'tess.tfl': 'volume,author,text,title',
'start': str(start),
'rows': str(rows)
}
if stopword_list is not None:
if _is_sequence(stopword_list):
stopword_list = ','.join(stopword_list)
elif not isinstance(stopword_list, (str, unicode)):
raise ValueError('invalid type for stopword_list, expected a string or something iterable')
get_params['tess.sl'] = str(stopword_list)
response = requests.get(COMPARE_URL.format(solr_url), params=get_params)
response.raise_for_status()
# This couldn't possibly be abused... cough
return eval(str(response.text))
def is_whoosh_backend():
backend_alias = connection_router.for_read()
return connections[backend_alias].__class__.__name__ == "WhooshEngine"