Flask-SQLAlchemy query many-to-many tagging with multiple requred tags -

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मैंने मॉडल को परिभाषित किया है: 

  टैग = db.Table ('tags', db । कॉलम ('टैग_id', डीबी.इन्टेजर, डीबी। फ़्रीगेनकी ('टैग.आईडी')), डीबी। कॉलम ('फोटो_आईडी', डीबी। इंटेगर, डीबी। फ़ोरेंसकी ('फोटो.आईडी')),) वर्ग टैग (Db.Model): id = db.Column (db.Integer, primary_key = true) name = db.Column (db.String (32), अद्वितीय = True) क्लास फोटो (db.Model): id = db.Column (Db.Integer, primary_key = true) sha1sum = db.Column (db.LargeBinary (20), अनन्य = सत्य) ... टैग = db.relationship ('टैग', माध्यमिक = टैग, backref = db.backref (' फोटो ', आलसी =' गतिशील '))   
 फ़्लास्क नियंत्रक / दृश्य में मुझे इनपुट टैग की सरणी मिलती है उदाहरण के लिए  [' summer ',' selfie ', ...]  
 प्रश्न:  
     
  1.  तस्वीरों के लिए कुशल क्वेरी जिसमें सभी अनुरोधित टैग होते हैं?  
  2.  खोज के लिए इसे कैसे बढ़ाया जा सकता है अधूरे टैग जैसे कि  ['summ', 'elfi', ...] ?    
     
     
     सबसे अधिक  कुशल  (i खोज करने के लिए आपके पास बहुत से टैग हैं), लेकिन क्वेरी लिखने के लिए बहुत ही  पठनीय  तरीका:  
      input_tags = ['selfie', 'summer'] q = db Input_tags में टैग के लिए session.query (फोटो): q = q.filter (Photo.tags.any (टैग.नाम == टैग))   
     अपूर्ण उपयोग के लिए  startwith ( ..)  के बजाय  == :  
      input_tags = ['sum', 'fu'] q = db.session.query (फोटो) इनपुट_टैग में टैग के लिए: q = q.filter (Photo.tags.any (टैग.नाम.स्टारट्ससह (टैग)))

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