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  • °Ô½ÃÀÚ À̸§:
  • Charles Leifer
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  • http://www.charlesleifer.com/blog/

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Django-generic Áý°è ¼³¸í

ÀϹÝÀûÀ¸·Î °ü·Ã µ¥ÀÌÅ͸¦À§ÇÑ ÁÖ¼® () ¹× Áý°è () Django-generic-aggregationÀº ÀϹÝÀûÀ¸·Î °ü·Ã µ¥ÀÌÅÍ¿¡ ´ëÇÑ Annotate () ¹× Áý°è ()¸¦ Á¦°øÇÕ´Ï´Ù. examplesyou´Â ºí·Î±× Ç׸ñ¿¡¼­ °¡Àå ÁÖ¼®À» °¡Àå ¸¹ÀÌ ÁÖ¼®À» ¿øÇÕ´Ï´Ù. >>>¿¡¼­ django.contrib.comments.models import comment >>> django.db.models¿¡¼­ °¡Á® ¿À±â >>> Blog.models¿¡¼­ BlogEntry °¡Á® ¿À±â >>> generic_aggregation °¡Á® ¿À±â generic_annotate >>> agnotated = generic_annotate (blogentry.objects.all (), comment.content_object, 'id', count) >>> ÁÖ¼®ÀÌ ´Þ¸° Ç׸ñ ... Print Entry.title, Entry.Scorethe °¡Àå ÀαâÀÖ´Â 5 ¹ø° µÎ ¹ø° º£½ºÆ® 4NOBODY ´ñ±Û 0you´Â DJango.db.models °¡Á® ¿À±â ÇÕ°è¿¡¼­ºÎÅÍ ¾î¶² Ç׸ñÀ» °¡Á® ¿À´ÂÁö ¾Ë¾Æ ³»°í ½Í½À´Ï´Ù. = food.objects.create (name = 'Apple') # foodrating.Objects.Create (content_object = apple, µî±Þ = 3) µî±ÞÀ» ¸¸µì´Ï´Ù. rating.objects.create (content_object = apple, µî±Þ = 5) rating.objects .create (content_object = apple, µî±Þ = 7) >>> Áý°è = generic_aggregate (food.objects.all (), rating.content_object, 'µî±Þ ", ÇÕ) >>> P rint Aggregate15 >>> Áý°è = generic_aggregate (food.objects.all (), rate.content_Object, 'µî±Þ ", AVG) >>> Print Aggregate5 Å×½ºÆ® - °Å±â¿¡ ´õ ¸¹Àº ¿¹°¡ ÀÖ½À´Ï´Ù. Postgres ¹× SQLite ¿ä±¸ »çÇ×À¸·Î Å×½ºÆ®µÇ¾ú½À´Ï´Ù. ¡¤ ÆÄÀ̽㠡¤ Àå°í


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