ruby - passing chained scopes as params on rails 3? -

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मेरे पास यह मेरे विचार पर है: 

  & lt;% = link_to "शर्ट" Things_ path (: scope = & gt; "शर्ट")% & gt;   
 यह मेरे नियंत्रक पर  
  @products = Product.send (params [: scope])   
 हालांकि मैं श्रृंखलित स्कोप का प्रयोग करना चाहता हूं जैसे:  
  & lt;% = link_to "शर्ट", products_path (: scope = & gt; "shirts.blue")% & gt;   
 लेकिन किसी कारण से यह काम नहीं करता।  
 शायद मेरी वाक्यविन्यास गलत है?   
 
 
 इसे आज़माएं  
  & lt;% = link_to" शर्ट ", products_path (: scope = & gt;" shirts.blue ")% & gt;   
 मॉडल  
  @products = उत्पादकैड पैरामीटर [: गुंजाइश] .split ("।")। प्रत्येक {| गुंजाइश | @ प्रोडक्ट्स = @ उत्पादों.send (स्कोप)}

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