Solr dictionary based suggester won't suggest on whole phrase - solr

Question

When I enter a query containing multiple word to my Suggester component I got separated results for each. The problem is well explained here: How to have Solr autocomplete on whole phrase when query contains multiple terms?
The only difference is, I have a suggester based on a dictionary file, not an index field. The solution explained in the above link and many others didn't work
Here is the configuration:
<searchComponent class="solr.SpellCheckComponent" name="suggest">
<lst name="spellchecker">
<str name="name">suggest</str>
<str name="classname">org.apache.solr.spelling.suggest.Suggester</str>
<str name="lookupImpl">org.apache.solr.spelling.suggest.fst.AnalyzingInfixLookupFactory</str>
<str name="buildOnCommit">true</str>
<str name="suggestAnalyzerFieldType">text_suggest</str>
<str name="sourceLocation">suggestionsFull.txt</str>
</lst>
<str name="queryAnalyzerFieldType">text_suggest</str>
<!-- <queryConverter name="queryConverter" class="org.apache.solr.spelling.SuggestQueryConverter"/> -->
</searchComponent>
<requestHandler class="org.apache.solr.handler.component.SearchHandler" name="/suggest">
<lst name="defaults">
<str name="spellcheck">true</str>
<str name="spellcheck.dictionary">suggest</str>
<str name="spellcheck.onlyMorePopular">true</str>
<str name="spellcheck.count">5</str>
<str name="spellcheck.collate">false</str>
</lst>
<arr name="components">
<str>suggest</str>
</arr>
</requestHandler>
schema.xml
<fieldType name="text_suggest" class="solr.TextField" positionIncrementGap="100">
<analyzer>
<tokenizer class="solr.KeywordTokenizerFactory"/>
<filter class="solr.TurkishLowerCaseFilterFactory"/>
<filter class="solr.TrimFilterFactory"/>
</analyzer>
</fieldType>
I also use spellcheck.q parameter instead of q
http://localhost:8983/solr/collection1/suggest?spellcheck.q=bu+bir&wt=json&indent=true
What am I doing wrong?

Answer 1

Finally I found the solution:
Looks like even if you build the suggestion dictionary from a file but not from an index field, you have to specify an index field in the solrconfig. Thus in the schema.xml create a dummy field from the text_suggest fieldtype which we had already created:
<field name="text_suggest" type="text_suggest" indexed="false" stored="false" />
Then in the solrconfig.xml add <str name="field">text_suggest</str> line to the searchComponent:
<searchComponent class="solr.SpellCheckComponent" name="suggest">
<lst name="spellchecker">
<str name="name">suggest</str>
<str name="classname">org.apache.solr.spelling.suggest.Suggester</str>
<str name="lookupImpl">org.apache.solr.spelling.suggest.fst.AnalyzingInfixLookupFactory</str>
<str name="buildOnCommit">true</str>
<str name="suggestAnalyzerFieldType">text_suggest</str>
<str name="field">text_suggest</str>
<str name="sourceLocation">suggestionsFull.txt</str>
</lst>
</searchComponent>
Restart the solr and you're done!