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Simplified handling of weights in SearchRank.

This commit is contained in:
Simon Charette 2020-02-25 00:12:04 -05:00 committed by Mariusz Felisiak
parent 1138ca4c57
commit 5637933268
1 changed files with 6 additions and 17 deletions
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23
django/contrib/postgres/search.py
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@ -222,23 +222,12 @@ class SearchRank(Func):
vector = SearchVector(vector)
if not hasattr(query, 'resolve_expression'):
query = SearchQuery(query)
if weights is not None and not hasattr(weights, 'resolve_expression'):
weights = Value(weights)
self.weights = weights
super().__init__(vector, query)
def as_sql(self, compiler, connection, function=None, template=None):
extra_params = []
extra_context = {}
if template is None and self.weights:
template = '%(function)s(%(weights)s, %(expressions)s)'
weight_sql, extra_params = compiler.compile(self.weights)
extra_context['weights'] = weight_sql
sql, params = super().as_sql(
compiler, connection,
function=function, template=template, **extra_context
)
return sql, extra_params + params
expressions = (vector, query)
if weights is not None:
if not hasattr(weights, 'resolve_expression'):
weights = Value(weights)
expressions = (weights,) + expressions
super().__init__(*expressions)
SearchVectorField.register_lookup(SearchVectorExact)