def general_search(query):
""" Queries of full equations should not call this, but we won't catch
pieces of an equation without '=', '+', lt, or gt, so we have to
account for those. An icontains filter ought to cover it. """
predicates = [Q(term__icontains=s) for s in predicate_string_set(query)]
term_results = SearchTerm.objects.filter(reduce(operator.or_, predicates))\
.prefetch_related(*chain(__VAR_PREFETCH, __EQ_PREFETCH, __UNIT_PREFETCH))
if not term_results.count():
return None
dataQ = SmartPQ()
for t in term_results:
for obj in chain(t.variable_set.all(), t.equation_set.all(), t.unit_set.all()):
investigate_object(obj, query, dataQ)
return dataQ.ordered_list()
def equation_exclusive_search(query):
""" Since there are math characters in the query, we don't have to waste
time querying other models. We can just check equations. """
# our equations should not have spaces or stars. Underscores and parens may
# occur, but there should be a SearchTerm in the database with parens and
# underscores stripped. For edge cases, we include those queries anyway
init_predicate_strings = predicate_string_set(query)
eq_operator_split = lambda q: re.split(r'[=+\-*/^<>]+', q)
predicate_strings = copy(init_predicate_strings)
for q_string in init_predicate_strings:
for component in eq_operator_split(q_string):
predicate_strings.add(component)
predicates = [Q(term__icontains=s) for s in predicate_strings]
term_results = SearchTerm.objects.filter(reduce(operator.or_, predicates))\
.prefetch_related(*__EQ_PREFETCH)
if not term_results.count():
# using .count() so that we don't evaluate the queryset if not needed
return None
dataQ = SmartPQ() # custom priority queue for O(1) lookup!
any_in_set = lambda fcn, set_: any(fcn(q) for q in set_)
for t in term_results:
for eq in t.equation_set.all():
to_add = eq
if eq.is_definition():
to_add = eq.defined_var
if dataQ.has_value(to_add):
continue
eqname = eq.quick_name
l_eqname = eqname.lower()
# don't bother checking full_names since we know we have math text.
# full_names do not contain math.
# PRIORITY 0: quick name exact match for any in basic string set
if any_in_set(lambda q: q == eqname, init_predicate_strings):
dataQ.put((0, to_add))
# PRIORITY 1: same as 0, but case insensitive
elif any_in_set(lambda q: q.lower() == l_eqname, init_predicate_strings):
dataQ.put((1, to_add))
# PRIORITY 2: alternative name case insensitive match
elif any(any_in_set(lambda q: q.lower() == alt.term.lower(),
init_predicate_strings) for alt in eq.search_terms.all() if
alt.term != eqname):
dataQ.put((2, to_add))
# expand modified query set to components of operator splits
# PRIORITY 3: substrings of quick_names
elif any_in_set(lambda q: q.lower() in l_eqname, predicate_strings):
dataQ.put((3, to_add))
# PRIORITY 4: substrings of altnames
elif any(any_in_set(lambda q: q.lower() in alt.term.lower(),
predicate_strings) for alt in eq.search_terms.all() if
alt.term != eqname):
dataQ.put((4, to_add))
# PRIORITY 5: anything else caught in our database query
else:
dataQ.put((5, to_add))
return dataQ.ordered_list()
