Django QuerySet with filtered related objects -

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  वर्ग क्वार्टर (models.Model): ... वर्ग हाउस (models.Model): तिमाही = मॉडल। विदेशी की (क्वार्टर, संबंधित_नाम = 'मकान') कक्षा फ्लोररेन्ज (मॉडल.मॉडेल): घर = मॉडेल। फ़्रीविन्के (हाउस, संबंधित_नाम = 'फर्श_रंगे') is_commercial = models.BooleanField (डिफ़ॉल्ट = गलत)   
 ऑब्जेक्ट  घर  के  घरों  प्राप्त करने का सबसे अच्छा तरीका ढूंढने में मेरी सहायता करें, जहां  घर  एक या अधिक  floor_ranges   is_commercial = true    
 
 
 पहले एक चौथाई से संबंधित सभी घरों को प्राप्त करें    <पूर्व>  घर = हाउस.ऑब्जेक्ट्सफिल्टर (तिमाही = तिमाही)   
 फिर कम से कम एक मंजिल सीमा वाले  is_commercial = सच । ऐसा करने के लिए, संबंधित नाम  floor_ranges  का उपयोग करें, और डबल अंडरस्कोर  __  संबंध को विस्तारित करें।  
  houses = houses.filter ( अंत में,  अलग ()  का उपयोग करें  is_commercial = true  के साथ कई मंजिल वाले श्रेणियों वाले घरों के डुप्लिकेट परिणाम को रोकने के लिए।  <पूर्व>  घर = houses.distinct ()

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