how to filter search by values that are not available

Question

I have a list of items as:

i = SearchQuerySet().models(Item)

now, each item in i has a attribute, price

I wan

Answer 1

As per the SolrQuerySyntax

Pure Negative Queries:

-field:[* TO *] finds all documents without a value for field

You can try:

q=(*:* -price:[* TO *]) OR price:[300 TO 400]