Provides a way to specify search parameters and lazily load results. Supports chaining (a la QuerySet) to narrow the search.
| 11 | |
| 12 | |
| 13 | class SearchQuerySet: |
| 14 | """ |
| 15 | Provides a way to specify search parameters and lazily load results. |
| 16 | |
| 17 | Supports chaining (a la QuerySet) to narrow the search. |
| 18 | """ |
| 19 | |
| 20 | def __init__(self, using=None, query=None): |
| 21 | # ``_using`` should only ever be a value other than ``None`` if it's |
| 22 | # been forced with the ``.using`` method. |
| 23 | self._using = using |
| 24 | self.query = None |
| 25 | self._determine_backend() |
| 26 | |
| 27 | # If ``query`` is present, it should override even what the routers |
| 28 | # think. |
| 29 | if query is not None: |
| 30 | self.query = query |
| 31 | |
| 32 | self._result_cache = [] |
| 33 | self._result_count = None |
| 34 | self._cache_full = False |
| 35 | self._load_all = False |
| 36 | self._ignored_result_count = 0 |
| 37 | self.log = logging.getLogger("haystack") |
| 38 | |
| 39 | def _determine_backend(self): |
| 40 | # A backend has been manually selected. Use it instead. |
| 41 | if self._using is not None: |
| 42 | self.query = connections[self._using].get_query() |
| 43 | return |
| 44 | |
| 45 | # No backend, so rely on the routers to figure out what's right. |
| 46 | hints = {} |
| 47 | |
| 48 | if self.query: |
| 49 | hints["models"] = self.query.models |
| 50 | |
| 51 | backend_alias = connection_router.for_read(**hints) |
| 52 | |
| 53 | # The ``SearchQuery`` might swap itself out for a different variant |
| 54 | # here. |
| 55 | if self.query: |
| 56 | self.query = self.query.using(backend_alias) |
| 57 | else: |
| 58 | self.query = connections[backend_alias].get_query() |
| 59 | |
| 60 | def __getstate__(self): |
| 61 | """ |
| 62 | For pickling. |
| 63 | """ |
| 64 | len(self) |
| 65 | obj_dict = self.__dict__.copy() |
| 66 | obj_dict["_iter"] = None |
| 67 | obj_dict["log"] = None |
| 68 | return obj_dict |
| 69 | |
| 70 | def __setstate__(self, data_dict): |
no outgoing calls