keep mappings over field array values

spec/query_generator_spec.rb

@@ -98,6 +98,12 @@ class SqlGeneratorTester
       expect(@query.where_clause).to eq ['tags.name ILIKE ?', '%h1-r%']
     end
 
+    it 'tests search with field mappings when fields array has same mapping' do
+      @query = TextToSqlQuery.new('tags:hs1-r', [:'players.title', :'players.tags', :'players.device_id'], :'players.device_id', { tags: "tags.name" })
+
+      expect(@query.where_clause).to eq ['tags.name ILIKE ?', '%hs1-r%']
+    end
+
     it 'tests complex query' do
       text = '(device_id:"with space" tags:mta no-quotes-id-123)'\
       'or "id with quotes-5"  and   ( ("id with q 10" or "id with q 20")'\

text_to_sql_query.rb

@@ -10,6 +10,9 @@ class TextToSqlQuery
       mappings[field_name.to_sym] = field
       mappings
     end)
+    fields_mappings.each do |field, value|
+      @fields_mappings[field] = value if @fields_mappings[field]
+    end
   end
 
   def where_clause