Use termfreq(field,term) function for phrase with space in SOLR 4.1

Question

I am using termfreq(field,term) SOLR function. This works:

?fl=product_name,termfreq(product_name,"iphon")&q=iphone 4s     //Found freq

But the problem is to have term like "iphone 4s" with space

?fl=product_name,termfreq(product_name,"iphon 4s")&q=iphone 4s  //Return 0 freq

Return 0 freq although that term(phrase) exist in doc. So, the question is, can I use termfreq() function with full phrase like "iphone 4s", And how?

I am using SOLR 4.1. and analyzer for field is

<fieldType name="text_ws" class="solr.TextField">
    <analyzer>
        <tokenizer class="solr.WhitespaceTokenizerFactory"/>
        <filter class="solr.LowerCaseFilterFactory"/>
    </analyzer>
</fieldType>

Field is

<field name="product_name" type="text_ws" indexed="true" stored="true"/>

Answer 1

As you are using a WhitespaceTokenizerFactory the term iphone 4s would not exist as a term.
You could use KeywordTokenizerFactory for indexing, which doesn't tokenize the words and the phrase should be available.
Else you can check for shingle options which would group words for you.