![\"\"](\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\")
<\/div><\/p>\n
\uff01\uff01\u5f3a\u8c03\uff01\uff01\uff1a\u4e0a\u56fe\u6240\u793a\u7684\u8868\u540d\u3001\u5b57\u6bb5\u540d\u90fd\u662fmysql\u4e2d\u7684\u771f\u5b9e\u8868\/\u7269\u7406\u8868\uff0c\u800c\u6211\u4eec\u4e0b\u8ff0\u6240\u793a\u6240\u6709\u64cd\u4f5c\uff0c\u90fd\u662f\u901a\u8fc7\u6a21\u578b\u7c7b\u6765\u64cd\u4f5c\u7269\u7406\u8868\uff0c\u4f8b\u5982\u65e0\u8bba\u589e\u5220\u6539\u67e5\uff0c\u6240\u4f7f\u7528\u7684\u5b57\u6bb5\u540d\u90fd\u6a21\u578b\u7c7b\u4e2d\u7684\u5b57\u6bb5<\/p>\n
\u6309\u7167\u4e0a\u56fe\u6240\u793a\uff0c\u7531\u4e8eforeign key\u7684\u5173\u7cfb\uff0c\u6211\u4eec\u9700\u8981\u4e8b\u5148\u5f80app01_publish\u4e0eapp01_authordetail\u91cc\u63d2\u5165\u8bb0\u5f55<\/p>\n
# 1\u3001\u9700\u6c42\uff1a\u901a\u8fc7\u6a21\u578bPublish\u5f80\u8868app01_publish\u91cc\u63d2\u5165\u4e09\u5bb6\u51fa\u7248\u793e\nPublish.objects.create(name='\u5317\u4eac\u51fa\u7248\u793e')\nPublish.objects.create(name='\u957f\u6625\u51fa\u7248\u793e')\nPublish.objects.create(name='\u5927\u8fde\u51fa\u7248\u793e')\n\n# 2\u3001\u9700\u6c42\uff1a\u901a\u8fc7\u6a21\u578bAuthorDetail\u5f80\u8868app01_authordetail\u91cc\u63d2\u5165\u4e09\u6761\u4f5c\u8005\u8be6\u60c5\nAuthorDetail.objects.create(tel='18611312331')\nAuthorDetail.objects.create(tel='15033413881')\nAuthorDetail.objects.create(tel='13011453220')<\/code><\/pre>\n\u6309\u7167\u4e0a\u56fe\u6240\u793a\uff0c\u63d2\u5165\u65f6\u4f1a\u6d89\u53ca\u5230\u591a\u5f20\u8868\uff0c\u6211\u4eec\u540c\u6837\u5206\u4e09\u79cd\u60c5\u51b5\u6765\u4ecb\u7ecd<\/p>\n
1\u3001\u591a\u5bf9\u4e00\uff1aapp01_book\u4e0eapp01_publish<\/p>\n
# \u9700\u6c42\uff1a\u4e66\u7c4d(\u8475\u82b1\u5b9d\u5178\u3001\u83ca\u82b1\u5b9d\u5178\u3001\u6843\u82b1\u5b9d\u5178)\u90fd\u662f\u5728\u5317\u4eac\u51fa\u7248\u793e\u51fa\u7248\u7684\n# 1\u3001\u5148\u901a\u8fc7\u6a21\u578bPublish\u4ece\u51fa\u7248\u793e\u8868app01_publish\u67e5\u51fa\u5317\u4eac\u51fa\u7248\u793e\npublish_obj=Publish.objects.filter(name='\u5317\u4eac\u51fa\u7248\u793e').first()\n# \u4e0a\u8ff0\u4ee3\u7801\u4e5f\u53ef\u4ee5\u7b80\u5199\u4e3a\uff1apublish_obj=Publish.objects.get(name='\u5317\u4eac\u51fa\u7248\u793e')\n\n# 2\u3001\u518d\u901a\u8fc7\u6a21\u578bBook\u5f80\u4e66\u7c4d\u8868app01_book\u91cc\u63d2\u5165\u4e09\u672c\u4e66\u7c4d\u4e0e\u51fa\u7248\u793e\u7684\u5bf9\u5e94\u5173\u7cfb\n# \u65b9\u5f0f\u4e00\uff1a\u4f7f\u7528publish\u53c2\u6570\u6307\u5b9a\u5173\u8054\nbook_obj1=Book.objects.create(title='\u8475\u82b1\u5b9d\u5178',price=2000,pub_date='1985-3-11',publish=publish_obj)\n\nbook_obj2=Book.objects.create(title='\u83ca\u82b1\u5b9d\u5178',price=3000,pub_date='1990-1-21',publish=publish_obj)\n\nbook_obj3=Book.objects.create(title='\u6843\u82b1\u5b9d\u5178',price=4000,pub_date='1991-1-23',publish=publish_obj)\n\n# \u65b9\u5f0f\u4e8c\uff1a\u4f7f\u7528publish_id\u53c2\u6570\u6307\u5b9a\u5173\u8054\nbook_obj1=Book.objects.create(title='\u8475\u82b1\u5b9d\u5178',price=2000,pub_date='1985-3-11',publish_id=publish_obj.nid)\n\nbook_obj2=Book.objects.create(title='\u83ca\u82b1\u5b9d\u5178',price=3000,pub_date='1990-1-21',publish_id=1) # \u5728\u5df2\u7ecf\u51fa\u7248\u793eid\u7684\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u76f4\u63a5\u6307\u5b9a\n\nbook_obj3=Book.objects.create(title='\u6843\u82b1\u5b9d\u5178',price=4000,pub_date='1991-1-23',publish_id=1)\n\n# \u6ce8\u610f\uff1a\u65e0\u8bba\u65b9\u5f0f\u4e00\u8fd8\u662f\u65b9\u5f0f\u4e8c\u5f97\u5230\u7684\u4e66\u7c4d\u5bf9\u8c61book_obj1\u3001book_obj2\u3001book_obj3\n# \u90fd\u53ef\u4ee5\u8c03\u7528publish\u5b57\u6bb5\u6765\u8bbf\u95ee\u5173\u8054\u7684\u90a3\u4e00\u4e2a\u51fa\u7248\u793e\u5bf9\u8c61\n# \u90fd\u53ef\u4ee5\u8c03\u7528publish_id\u6765\u8bbf\u95ee\u5173\u8054\u7684\u90a3\u4e00\u4e2a\u51fa\u7248\u793e\u5bf9\u8c61\u7684nid\nprint(book_obj1.publish,book_obj1.publish_id) \nprint(book_obj2.publish,book_obj2.publish_id) \nprint(book_obj3.publish,book_obj3.publish_id)\n# \u4e09\u672c\u4e66\u5173\u8054\u7684\u662f\u540c\u4e00\u4e2a\u51fa\u7248\u793e\uff0c\u6240\u4ee5\u8f93\u51fa\u7ed3\u679c\u5747\u76f8\u540c<\/code><\/pre>\n\u53c2\u7167\u4e0a\u8ff0\u6b65\u9aa4\uff0c\u628a\u5269\u4f59\u4e09\u672c\u4e66\u4e0e\u51fa\u7248\u793e\u7684\u5bf9\u5e94\u5173\u7cfb\u4e5f\u63d2\u5165<\/p>\n
book_obj1 = Book.objects.create(title='\u7389\u5973\u5fc3\u7ecf', price=5000, pub_date='1988-3-24', publish_id=2)\n\nbook_obj2 = Book.objects.create(title='\u7389\u7537\u5fc3\u7ecf', price=3000, pub_date='1985-6-17', publish_id=2)\n\nbook_obj3 = Book.objects.create(title='\u4e5d\u9634\u771f\u7ecf', price=6000, pub_date='1983-8-17', publish_id=3)<\/code><\/pre>\n2\u3001\u4e00\u5bf9\u4e00\uff1aapp01_author\u4e0eapp01_authordetail<\/p>\n
# \u9700\u6c42\uff1a\u63d2\u5165\u4e09\u4e2a\u4f5c\u8005\uff0c\u5e76\u4e0e\u4f5c\u8005\u8be6\u60c5\u8868\u4e00\u4e00\u5bf9\u5e94\n# \u7531\u4e8e\u4f5c\u8005\u8be6\u60c5\u8868\u6211\u4eec\u5df2\u7ecf\u4e8b\u5148\u521b\u5efa\u597d\u8bb0\u5f55\uff0c\u6240\u4ee5\u53ea\u9700\u8981\u5f80\u4f5c\u8005\u8868\u63d2\u5165\u8bb0\u5f55\u5373\u53ef\n# \u65b9\u5f0f\u4e00\uff1a\u9700\u8981\u4e8b\u5148\u8fc7\u6ee4\u51fa\u4f5c\u8005\u8be6\u60c5\u7684\u5bf9\u8c61\uff0c\u7136\u540e\u901a\u8fc7\u6a21\u578bAuthor\u7684\u5b57\u6bb5author\u6765\u6307\u5b9a\u8981\u5173\u8054\u7684\u4f5c\u8005\u8be6\u60c5\u5bf9\u8c61(\u7565)\n\n# \u65b9\u5f0f\u4e8c\uff1a\u786e\u5b9a\u4f5c\u8005\u8be6\u60c5\u5bf9\u8c61\u7684id\uff0c\u7136\u540e\u901a\u8fc7\u6a21\u578bAuthor\u901a\u8fc7\u5b57\u6bb5author_id\u6765\u6307\u5b9a\u5173\u8054\u5173\u7cfb\uff0c\nAuthor.objects.create(name='egon',age=18,author_detail_id=1)\nAuthor.objects.create(name='kevin',age=38,author_detail_id=2)\nAuthor.objects.create(name='rose',age=28,author_detail_id=3)<\/code><\/pre>\n3\u3001\u591a\u5bf9\u591a\uff1aapp01_book\u4e0eapp01_author<\/p>\n
# \u6211\u4eec\u53c2\u7167\u7269\u7406\u8868app01_book_authors\u5236\u5b9a\u9700\u6c42\uff0c\u9700\u8981\u521b\u5efa\u5982\u4e0b\u5173\u7cfb\n# 1\u3001\u8475\u82b1\u5b9d\u5178\u7684\u4f5c\u8005\u4e3a\uff1aegon\u3001kevin\n# 2\u3001\u83ca\u82b1\u5b9d\u5178\u7684\u4f5c\u8005\u4e3a\uff1aegon\u3001kevin\u3001rose\n# 3\u3001\u6843\u82b1\u5b9d\u5178\u7684\u4f5c\u8005\u4e3a\uff1aegon\u3001kevin\n# 4\u3001\u7389\u5973\u5fc3\u7ecf\u7684\u4f5c\u8005\u4e3a\uff1akevin\u3001rose\n# 5\u3001\u7389\u7537\u5fc3\u7ecf\u7684\u4f5c\u8005\u4e3a\uff1akevin\n# 6\u3001\u4e5d\u9634\u771f\u7ecf\u7684\u4f5c\u8005\u4e3a\uff1aegon\u3001rose\n\n# \u9700\u8981\u521b\u5efa\u51fa\u4e0a\u8ff0\u5173\u7cfb\uff0c\u5177\u4f53\u505a\u6cd5\u5982\u4e0b\n# 1\u3001\u5148\u83b7\u53d6\u4e66\u7c4d\u5bf9\u8c61\nbook_obj1=Book.objects.get(title='\u8475\u82b1\u5b9d\u5178')\nbook_obj2=Book.objects.get(title='\u83ca\u82b1\u5b9d\u5178')\nbook_obj3=Book.objects.get(title='\u6843\u82b1\u5b9d\u5178')\nbook_obj4=Book.objects.get(title='\u7389\u5973\u5fc3\u7ecf')\nbook_obj5=Book.objects.get(title='\u7389\u7537\u5fc3\u7ecf')\nbook_obj6=Book.objects.get(title='\u4e5d\u9634\u771f\u7ecf')\n\n# 2\u3001\u7136\u540e\u83b7\u53d6\u4f5c\u8005\u5bf9\u8c61\negon=Author.objects.get(name='egon')\nkevin=Author.objects.get(name='kevin')\nrose=Author.objects.get(name='rose')\n\n# 3\u3001\u6700\u540e\u4f9d\u6b21\u521b\u5efa\u4e0a\u8ff0\u5173\u7cfb\uff1a\u5728\u539f\u751fSQL\u4e2d\u591a\u5bf9\u591a\u5173\u7cfb\u6d89\u53ca\u5230\u64cd\u4f5c\u7b2c\u4e09\u5f20\u5173\u7cfb\u8868\uff0c\u4f46\u662f\u5728ORM\u4e2d\u6211\u4eec\u53ea\u9700\u8981\u64cd\u4f5c\u6a21\u578b\u7c7bBook\u4e0b\u7684\u5b57\u6bb5author\u5373\u53ef\nbook_obj1.authors.add(egon,kevin)\nbook_obj2.authors.add(egon,kevin,rose)\nbook_obj3.authors.add(egon,kevin)\nbook_obj4.authors.add(kevin,rose)\nbook_obj5.authors.add(kevin)\nbook_obj6.authors.add(egon,rose)<\/code><\/pre>\n\u53ef\u4ee5\u901a\u8fc7\u4e66\u7c4d\u5bf9\u8c61\u4e0b\u7684authors\u5b57\u6bb5\u83b7\u53d6\u5176\u6240\u5173\u8054\u7684\u6240\u6709\u4f5c\u8005\u5bf9\u8c61<\/p>\n
book_obj1.authors.all() # \u8fd4\u56de\u4e00\u4e2a\u5b58\u6709\u591a\u4e2a\u4f5c\u8005\u7684queryset<\/code><\/pre>\n3.2 \u5220\u9664\u3001\u4fee\u6539\u8bb0\u5f55<\/h3>\n
<\/div><\/p>\n
# 1\u3001book_obj.authors.remove() \uff1a\u5c06\u67d0\u4e2a\u7279\u5b9a\u7684\u5bf9\u8c61\u4ece\u88ab\u5173\u8054\u5bf9\u8c61\u96c6\u5408\u4e2d\u53bb\u9664\n# \u4ece\u83ca\u82b1\u5b9d\u5178\u7684\u4f5c\u8005\u96c6\u5408\u4e2d\u53bb\u6389\u4f5c\u8005rose\nrose = Author.objects.get(name='rose')\nbook_obj2 = Book.objects.get(title='\u83ca\u82b1\u5b9d\u5178')\nbook_obj2.authors.remove(rose)\n\n# 2\u3001book_obj.authors.clear()\uff1a\u6e05\u7a7a\u88ab\u5173\u8054\u5bf9\u8c61\u96c6\u5408\n# \u6e05\u7a7a\u83ca\u82b1\u5b9d\u5178\u6240\u5173\u8054\u7684\u6240\u6709\u4f5c\u8005\nbook_obj2 = Book.objects.get(title='\u83ca\u82b1\u5b9d\u5178')\nbook_obj2.authors.clear()\n\n# 3\u3001book_obj.authors.set()\uff1a\u5148\u6e05\u7a7a\u518d\u91cd\u65b0\u8bbe\u7f6e\u3000\n# \u7389\u7537\u5fc3\u7ecf\u7684\u4f5c\u8005\u539f\u6765\u4e3akevin\uff0c\u8981\u6c42\u8bbe\u7f6e\u4e3aegon\u3001rose\negon=Author.objects.get(name='egon')\nrose=Author.objects.get(name='rose')\n\nbook_obj5 = Book.objects.get(title='\u7389\u7537\u5fc3\u7ecf')\n\nbook_obj5.authors.set([egon,rose]) # \u591a\u4e2a\u4f5c\u8005\u5bf9\u8c61\u653e\u5230\u5217\u8868\u91cc<\/code><\/pre>\n<\/div><\/p>\n
\u56db \u67e5\u8be2\u8bb0\u5f55<\/h1>\n
\u6570\u636e\u5e93\u64cd\u4f5c\u6700\u5e38\u7528\u7684\u8fd8\u662f\u67e5\u8be2\u64cd\u4f5c\uff0c\u5728\u4ecb\u7ecdORM\u4e0b\u591a\u8868\u5173\u8054\u67e5\u8be2\u65f6\uff0c\u9700\u8981\u4e8b\u5148\u8bb0\u4f4f\u5173\u4e8eORM\u6a21\u578b\u7684\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u6982\u5ff5\uff1a\u5728\u4f7f\u7528\u6a21\u578b\u7c7b\u8fdb\u884c\u591a\u8868\u5173\u8054\u67e5\u8be2\u65f6\uff0c\u5982\u679c\u786e\u5b9a\u4e24\u5f20\u8868\u5b58\u5728\u5173\u8054\u5173\u7cfb\uff0c\u90a3\u4e48\u5728\u9009\u53d6\u4e00\u4e2a\u8868\u4f5c\u4e3a\u8d77\u59cb\uff08\u4e3a\u4e86\u540e\u7eed\u63cf\u8ff0\u65b9\u4fbf\uff0c\u6211\u4eec\u5c06\u5176\u7b80\u79f0\u4e3a"\u57fa\u8868"\uff09\u540e\uff0c\u53ef\u4ee5\u8de8\u8868\u5f15\u7528\u6765\u81ea\u53e6\u5916\u4e00\u5f20\u4e2d\u7684\u5b57\u6bb5\u503c\uff0c\u8fd9\u5b58\u5728\u6b63\u5411\u4e0e\u53cd\u5411\u4e4b\u5206<\/p>\n
\u5982\u679c\u5173\u8054\u5b57\u6bb5\u5b58\u5728\u4e8e\u57fa\u8868\u4e2d\uff0c\u79f0\u4e4b\u4e3a\u6b63\u5411\u67e5\u8be2\uff0c\u5426\u5219\uff0c\u79f0\u4e4b\u4e3a\u53cd\u5411\u67e5\u8be2<\/p>\n
\u4f8b\u5982\u8868\u6a21Book\u4e0ePublish\uff0c\u5173\u8054\u5b57\u6bb5\u5b58\u5728\u4e8eBook\u4e2d<\/p>\n
# \u5f53\u4ee5Book\u4e3a\u57fa\u8868\u65f6\uff0c\u79f0\u4e4b\u4e3a\u6b63\u5411\u67e5\u8be2\nBook(\u57fa\u8868)-------\u6b63\u5411---------->Publish\n\n# \u5f53\u4ee5Publish\u4e3a\u57fa\u8868\u65f6\uff0c\u79f0\u4e4b\u4e3a\u53cd\u5411\u67e5\u8be2\nBook<-------\u53cd\u5411----------Publish(\u57fa\u8868)<\/code><\/pre>\n\u4f7f\u7528\u539f\u751fsql\u8fdb\u884c\u591a\u8868\u5173\u8054\u67e5\u8be2\u65f6\u65e0\u975e\u4e24\u79cd\u65b9\u5f0f\uff1a\u5b50\u67e5\u8be2\u3001join\u8fde\u8868\u67e5\u8be2\uff0cORM\u91cc\u540c\u6837\u6709\u4e24\u79cd\u67e5\u8be2\u65b9\u5f0f\uff08\u4e25\u683c\u4f9d\u8d56\u6b63\u5411\u3001\u53cd\u5411\u7684\u6982\u5ff5\uff09<\/p>\n
4.1 \u57fa\u4e8e\u5bf9\u8c61\u7684\u8de8\u8868\u67e5\u8be2<\/h3>\n
<\/div><\/p>\n
1\u3001\u8de8\u4e24\u5f20\u8868\u67e5\u8be2<\/h4>\n1.1\u3001\u4e00\u5bf9\u4e00\u67e5\u8be2\uff08\u6a21\u578b\u7c7bAuthor\u4e0eAuthorDetail\uff09<\/h5>\n
\u6b63\u5411\u67e5\u8be2\uff0c\u6309\u5173\u8054\u5b57\u6bb5\uff1aauthor_detail<\/p>\n
# \u9700\u6c42\uff1a\u67e5\u8be2\u4f5c\u8005egon\u7684\u624b\u673a\u53f7\n# 1\u3001\u5148\u53d6\u51fa\u4f5c\u8005\u5bf9\u8c61\negon=Author.objects.filter(name='egon').first() \n# 2\u3001\u6b63\u5411\u67e5\u8be2\uff1a\u6839\u636e\u4f5c\u8005\u5bf9\u8c61\u4e0b\u7684\u5173\u8054\u5b57\u6bb5author_detail\u53d6\u5230\u4f5c\u8005\u8be6\u60c5\nprint(egon.author_detail.tel) # \u8f93\u51fa\uff1a18611312331<\/code><\/pre>\n\u53cd\u5411\u67e5\u8be2\uff0c\u6309\u6a21\u578b\u540d(\u5c0f\u5199)\uff1aauthor<\/p>\n
# \u9700\u6c42\uff1a\u67e5\u8be2\u624b\u673a\u53f7\u4e3a'18611312331'\u7684\u4f5c\u8005\u540d\n# 1\u3001\u5148\u53d6\u51fa\u4f5c\u8005\u7684\u8be6\u60c5\u5bf9\u8c61\ntel=AuthorDetail.objects.filter(tel='18611312331').first()\n# 2\u3001\u53cd\u5411\u67e5\u8be2\uff1a\u6839\u636e\u5c0f\u5199\u7684\u6a21\u578b\u540dauthor\u53d6\u5230\u4f5c\u8005\u5bf9\u8c61\nprint(tel.author.name) # \u8f93\u51fa\uff1aegon<\/code><\/pre>\n1.2\u3001\u591a\u5bf9\u4e00\u67e5\u8be2\uff08\u6a21\u578b\u7c7bBook\u4e0ePublish\uff09<\/h5>\n
\u6b63\u5411\u67e5\u8be2\uff0c\u6309\u5173\u8054\u5b57\u6bb5\uff1apublish<\/p>\n
# \u9700\u6c42\uff1a\u67e5\u8be2\u8475\u82b1\u5b9d\u5178\u7684\u51fa\u7248\u793e\u540d\u5b57\n# 1\u3001\u5148\u53d6\u4e66\u7c4d\u5bf9\u8c61\nbook_obj=Book.objects.filter(title='\u8475\u82b1\u5b9d\u5178').first()\n# 2\u3001\u6b63\u5411\u67e5\u8be2\uff1a\u6839\u636e\u4e66\u7c4d\u5bf9\u8c61\u4e0b\u7684\u5173\u8054\u5b57\u6bb5publish\u53d6\u5230\u51fa\u7248\u793e\nprint(book_obj.publish.name) # \u8f93\u51fa\uff1a\u5317\u4eac\u51fa\u7248\u793e<\/code><\/pre>\n\u53cd\u5411\u67e5\u8be2\uff0c\u6309\u6a21\u578b\u540d(\u5c0f\u5199)_set\uff1abook_set<\/p>\n
# \u9700\u6c42\uff1a\u67e5\u8be2\u5317\u4eac\u51fa\u7248\u793e\u90fd\u51fa\u7248\u7684\u6240\u6709\u4e66\u7c4d\u540d\u5b57\n# 1\u3001\u5148\u53d6\u51fa\u51fa\u7248\u793e\u5bf9\u8c61\npublish_obj=Publish.objects.filter(name='\u5317\u4eac\u51fa\u7248\u793e').first()\n# 2\u3001\u53cd\u5411\u67e5\u8be2\uff1a\u6839\u636ebook_set\u53d6\u5230\u6240\u6709\u7684\u4e66\u7c4d\nbook_objs=publish_obj.book_set.all()\nprint([book_obj.title for book_obj in book_objs]) # \u8f93\u51fa\uff1a['\u8475\u82b1\u5b9d\u5178', '\u83ca\u82b1\u5b9d\u5178', '\u6843\u82b1\u5b9d\u5178']<\/code><\/pre>\n1.3\u3001\u591a\u5bf9\u591a\u67e5\u8be2\uff08\u6a21\u578b\u7c7bBook\u4e0eAuthor\uff09<\/h5>\n
\u6b63\u5411\u67e5\u8be2\uff0c\u6309\u5173\u8054\u5b57\u6bb5\uff0c\u5982authors<\/p>\n
# \u9700\u6c42\uff1a\u67e5\u8be2\u8475\u82b1\u5b9d\u5178\u7684\u6240\u6709\u4f5c\u8005\n# 1\u3001\u5148\u53d6\u51fa\u4e66\u7c4d\u5bf9\u8c61\nbook_obj=Book.objects.filter(title='\u8475\u82b1\u5b9d\u5178').first()\n# 2\u3001\u6b63\u5411\u67e5\u8be2\uff1a\u6839\u636e\u4e66\u7c4d\u5bf9\u8c61\u4e0b\u7684\u5173\u8054\u5b57\u6bb5authors\u53d6\u5230\u6240\u6709\u4f5c\u8005\nauthor_objs=book_obj.authors.all()\nprint([obj.name for obj in author_objs]) # \u8f93\u51fa\uff1a['egon', 'kevin']<\/code><\/pre>\n\u53cd\u5411\u67e5\u8be2\uff0c\u6309\u6a21\u578b\u540d(\u5c0f\u5199)_set\uff1a\u5982author_set<\/p>\n
# \u9700\u6c42\uff1a\u67e5\u8be2\u4f5c\u8005rose\u51fa\u7248\u7684\u6240\u6709\u4e66\u7c4d\n# 1\u3001\u5148\u53d6\u51fa\u4f5c\u8005\u5bf9\u8c61\negon=Author.objects.filter(name='rose').first() \n# 2\u3001\u53cd\u5411\u67e5\u8be2\uff1a\u6839\u636ebook_set\u53d6\u5230\u4f5c\u8005\u5bf9\u8c61\nbook_objs=egon.book_set.all()\nprint([book_obj.title for book_obj in book_objs]) # \u8f93\u51fa\uff1a['\u7389\u5973\u5fc3\u7ecf', '\u4e5d\u9634\u771f\u7ecf', '\u7389\u7537\u5fc3\u7ecf']<\/code><\/pre>\n2\u3001\u8fde\u7eed\u8de8>2\u5f20\u8868\u67e5\u8be2<\/h4>\n
\u8fde\u7eed\u8de8>2\u5f20\u8868\u7684\u64cd\u4f5c\u7684\u5957\u8def\u4e0e\u4e0a\u9762\u7684\u6848\u4f8b\u90fd\u662f\u4e00\u6837\u7684<\/p>\n
# \u9700\u6c42\uff1a\u67e5\u8be2\u8475\u82b1\u5b9d\u5178\u7684\u4f5c\u8005\u4eec\u7684\u624b\u673a\u53f7\n\nbook_obj=Book.objects.filter(title='\u8475\u82b1\u5b9d\u5178').first()\nauthor_objs=book_obj.authors.all()\nprint([author_obj.author_detail.tel for author_obj in author_objs]) \n# \u8f93\u51fa\uff1a['18611312331', '15033413881']<\/code><\/pre>\n4.2 \u57fa\u4e8e\u53cc\u4e0b\u5212\u7ebf\u7684\u8de8\u8868\u67e5\u8be2<\/h3>\n1\u3001\u8de8\u4e24\u5f20\u8868\u67e5\u8be2<\/h4>\n1.1\u3001\u4e00\u5bf9\u4e00\u67e5\u8be2\uff08\u6a21\u578b\u7c7bAuthor\u4e0eAuthorDetail\uff09<\/h5>\n
\u6b63\u5411\u67e5\u8be2\uff0c\u6309\u5173\u8054\u5b57\u6bb5+\u53cc\u4e0b\u5212\u7ebf\uff1aauthor_detail__<\/p>\n
# \u9700\u6c42\uff1a\u67e5\u8be2\u4f5c\u8005egon\u7684\u624b\u673a\u53f7\n# \u6ce8\u610fvalues()\u4e2d\u7684\u53c2\u6570\u662f\uff1a\u5173\u8054\u5b57\u6bb5\u540d__\u8981\u53d6\u7684\u90a3\u5f20\u88ab\u5173\u8054\u8868\u4e2d\u7684\u5b57\u6bb5\nres = Author.objects.filter(name='egon').values('author_detail__tel').first()\nprint(res['author_detail__tel']) # {'author_detail__tel': '18611312331'}\n\n# \u6ce8\u610f\uff1a\u57fa\u4e8e\u53cc\u4e0b\u5212\u7ebf\u7684\u8de8\u8868\u67e5\u8be2\u4f1a\u88abdjango\u7684orm\u8bc6\u522b\u4e3ajoin\u64cd\u4f5c\uff0c\u6240\u4ee5\u4e0a\u8ff0\u4ee3\u7801\u76f8\u5f53\u4e8e\u5982\u4e0bsql\uff0c\u540e\u7eed\u6848\u4f8b\u5747\u662f\u76f8\u540c\u539f\u7406\uff0c\u6211\u4eec\u4e0d\u518d\u7d2f\u8ff0\nselect app01_authordetail.tel from app01_author inner join app01_authordetail on app01_author.author_detail_id = app01_authordetail.nid where app01_author.name = 'egon';<\/code><\/pre>\n\u53cd\u5411\u67e5\u8be2\uff0c\u6309\u6a21\u578b\u540d(\u5c0f\u5199)+\u53cc\u4e0b\u5212\u7ebf\uff1aauthor__<\/p>\n
# \u9700\u6c42\uff1a\u67e5\u8be2\u624b\u673a\u53f7\u4e3a'18611312331'\u7684\u4f5c\u8005\u540d\n# \u6ce8\u610fvalues()\u4e2d\u7684\u53c2\u6570\u662f\uff1a\u5c0f\u5199\u7684\u6a21\u578b\u540d__\u8981\u53d6\u7684\u90a3\u5f20\u88ab\u5173\u8054\u8868\u4e2d\u7684\u5b57\u6bb5\nres=AuthorDetail.objects.filter(tel='18611312331').values('author__name').first()\nprint(res) # {'author__name': 'egon'}<\/code><\/pre>\n\u8865\u5145\uff1a\u57fa\u8868\u51b3\u5b9a\u4e86\u6b63\u5411\u8fd8\u662f\u53cd\u5411<\/p>\n
# 1\u3001\u9488\u5bf9\u4e0a\u4f8b\u4e2d\u6b63\u5411\u67e5\u8be2\u7684\u9700\u6c42\uff1a\u67e5\u8be2\u4f5c\u8005egon\u7684\u624b\u673a\u53f7\uff0c\u5982\u679c\u6211\u4eec\u9009\u53d6\u7684\u57fa\u8868\u662fAuthorDetail\uff0c\u90a3\u4e48\u5c31\u6210\u4e86\u53cd\u5411\u67e5\u8be2\uff0c\u5e94\u8be5\u7528\u53cd\u5411\u67e5\u8be2\u7684\u8bed\u6cd5\nres = AuthorDetail.objects.filter(author__name='egon').values('tel').first()\nprint(res) # {'tel': '18611312331'}\n\n# 2\u3001\u9488\u5bf9\u4e0a\u4f8b\u4e2d\u53cd\u5411\u67e5\u8be2\u7684\u9700\u6c42\uff1a\u67e5\u8be2\u624b\u673a\u53f7\u4e3a'18611312331'\u7684\u4f5c\u8005\u540d\uff0c\u5982\u679c\u6211\u4eec\u9009\u53d6\u7684\u57fa\u8868\u662fAuthor\uff0c\u90a3\u4e48\u5c31\u6210\u4e86\u6b63\u5411\u67e5\u8be2\uff0c\u5e94\u8be5\u7528\u6b63\u5411\u67e5\u8be2\u7684\u8bed\u6cd5\nres=Author.objects.filter(author_detail__tel='18611312331').values('name').first()\nprint(res) # {'name': 'egon'}<\/code><\/pre>\n1.2\u3001\u591a\u5bf9\u4e00\u67e5\u8be2\uff08\u6a21\u578b\u7c7bBook\u4e0ePublish\uff09<\/h5>\n
\u6b63\u5411\u67e5\u8be2\uff0c\u6309\u5173\u8054\u5b57\u6bb5+\u53cc\u4e0b\u5212\u7ebf\uff1apublish__<\/p>\n
# \u9700\u6c42\uff1a\u67e5\u8be2\u8475\u82b1\u5b9d\u5178\u7684\u51fa\u7248\u793e\u540d\u5b57\n# \u6ce8\u610fvalues()\u4e2d\u7684\u53c2\u6570\u662f\uff1a\u5173\u8054\u5b57\u6bb5\u540d__\u8981\u53d6\u7684\u90a3\u5f20\u88ab\u5173\u8054\u8868\u4e2d\u7684\u5b57\u6bb5\nres=Book.objects.filter(title='\u8475\u82b1\u5b9d\u5178').values('publish__name').first()\nprint(res['publish__name']) # {'publish__name': '\u5317\u4eac\u51fa\u7248\u793e'}<\/code><\/pre>\n\u53cd\u5411\u67e5\u8be2\uff0c\u6309\u6a21\u578b\u540d(\u5c0f\u5199)+\u53cc\u4e0b\u5212\u7ebf\uff1abook__<\/p>\n
# \u9700\u6c42\uff1a\u67e5\u8be2\u5317\u4eac\u51fa\u7248\u793e\u90fd\u51fa\u7248\u7684\u6240\u6709\u4e66\u7c4d\u540d\u5b57\n# \u6ce8\u610fvalues()\u4e2d\u7684\u53c2\u6570\u662f\uff1a\u5c0f\u5199\u7684\u6a21\u578b\u540d__\u8981\u53d6\u7684\u90a3\u5f20\u88ab\u5173\u8054\u8868\u4e2d\u7684\u5b57\u6bb5\nres = Publish.objects.filter(name='\u5317\u4eac\u51fa\u7248\u793e').values('book__title')\nprint(res) # <QuerySet [{'book__title': '\u8475\u82b1\u5b9d\u5178'}, {'book__title': '\u83ca\u82b1\u5b9d\u5178'}, {'book__title': '\u6843\u82b1\u5b9d\u5178'}]><\/code><\/pre>\n\u8865\u5145\uff1a\u57fa\u8868\u51b3\u5b9a\u4e86\u6b63\u5411\u8fd8\u662f\u53cd\u5411<\/p>\n
# 1\u3001\u9488\u5bf9\u4e0a\u4f8b\u4e2d\u6b63\u5411\u67e5\u8be2\u7684\u9700\u6c42\uff1a\u67e5\u8be2\u8475\u82b1\u5b9d\u5178\u7684\u51fa\u7248\u793e\u540d\u5b57\uff0c\u5982\u679c\u6211\u4eec\u9009\u53d6\u7684\u57fa\u8868\u662fPublish\uff0c\u90a3\u4e48\u5c31\u6210\u4e86\u53cd\u5411\u67e5\u8be2\uff0c\u5e94\u8be5\u7528\u53cd\u5411\u67e5\u8be2\u7684\u8bed\u6cd5\nres = Publish.objects.filter(book__title='\u8475\u82b1\u5b9d\u5178').values('name').first()\nprint(res) # {'name': '\u5317\u4eac\u51fa\u7248\u793e'}\n\n# 2\u3001\u9488\u5bf9\u4e0a\u4f8b\u4e2d\u53cd\u5411\u67e5\u8be2\u7684\u9700\u6c42\uff1a\u67e5\u8be2\u5317\u4eac\u51fa\u7248\u793e\u90fd\u51fa\u7248\u7684\u6240\u6709\u4e66\u7c4d\u540d\u5b57\uff0c\u5982\u679c\u6211\u4eec\u9009\u53d6\u7684\u57fa\u8868\u662fBook\uff0c\u90a3\u4e48\u5c31\u6210\u4e86\u6b63\u5411\u67e5\u8be2\uff0c\u5e94\u8be5\u7528\u6b63\u5411\u67e5\u8be2\u7684\u8bed\u6cd5\nres=Book.objects.filter(publish__name='\u5317\u4eac\u51fa\u7248\u793e').values('title')\nprint(res) # <QuerySet [{'title': '\u8475\u82b1\u5b9d\u5178'}, {'title': '\u83ca\u82b1\u5b9d\u5178'}, {'title': '\u6843\u82b1\u5b9d\u5178'}]><\/code><\/pre>\n1.3\u3001\u591a\u5bf9\u591a\u67e5\u8be2\uff08\u6a21\u578b\u7c7bBook\u4e0eAuthor\uff09<\/h5>\n
\u6b63\u5411\u67e5\u8be2\uff0c\u6309\u5173\u8054\u5b57\u6bb5+\u53cc\u4e0b\u5212\u7ebf\uff1aauthors__<\/p>\n
# \u9700\u6c42\uff1a\u67e5\u8be2\u8475\u82b1\u5b9d\u5178\u7684\u6240\u6709\u4f5c\u8005\n# \u6ce8\u610fvalues()\u4e2d\u7684\u53c2\u6570\u662f\uff1a\u5173\u8054\u5b57\u6bb5\u540d__\u8981\u53d6\u7684\u90a3\u5f20\u88ab\u5173\u8054\u8868\u4e2d\u7684\u5b57\u6bb5\nres=Book.objects.filter(title='\u8475\u82b1\u5b9d\u5178').values('authors__name')\nprint(res) # <QuerySet [{'authors__name': 'egon'}, {'authors__name': 'kevin'}]> <\/code><\/pre>\n\u53cd\u5411\u67e5\u8be2\uff0c\u6309\u6a21\u578b\u540d(\u5c0f\u5199)+\u53cc\u4e0b\u5212\u7ebf\uff1a\u5982book__<\/p>\n
# \u9700\u6c42\uff1a\u67e5\u8be2\u4f5c\u8005rose\u51fa\u7248\u7684\u6240\u6709\u4e66\u7c4d\n# \u6ce8\u610fvalues()\u4e2d\u7684\u53c2\u6570\u662f\uff1a\u5c0f\u5199\u7684\u6a21\u578b\u540d__\u8981\u53d6\u7684\u90a3\u5f20\u88ab\u5173\u8054\u8868\u4e2d\u7684\u5b57\u6bb5\nres = Author.objects.filter(name='rose').values('book__title')\nprint(res) # <QuerySet [{'book__title': '\u7389\u5973\u5fc3\u7ecf'}, {'book__title': '\u4e5d\u9634\u771f\u7ecf'}, {'book__title': '\u7389\u7537\u5fc3\u7ecf'}]><\/code><\/pre>\n\u8865\u5145\uff1a\u57fa\u8868\u51b3\u5b9a\u4e86\u6b63\u5411\u8fd8\u662f\u53cd\u5411<\/p>\n
# 1\u3001\u9488\u5bf9\u4e0a\u4f8b\u4e2d\u6b63\u5411\u67e5\u8be2\u7684\u9700\u6c42\uff1a\u67e5\u8be2\u8475\u82b1\u5b9d\u5178\u7684\u6240\u6709\u4f5c\u8005\uff0c\u5982\u679c\u6211\u4eec\u9009\u53d6\u7684\u57fa\u8868\u662fauthors\uff0c\u90a3\u4e48\u5c31\u6210\u4e86\u53cd\u5411\u67e5\u8be2\uff0c\u5e94\u8be5\u7528\u53cd\u5411\u67e5\u8be2\u7684\u8bed\u6cd5\nres=Author.objects.filter(book__title='\u8475\u82b1\u5b9d\u5178').values('name')\nprint(res) # <QuerySet [{'name': 'egon'}, {'name': 'kevin'}]>\n\n# 2\u3001\u9488\u5bf9\u4e0a\u4f8b\u4e2d\u53cd\u5411\u67e5\u8be2\u7684\u9700\u6c42\uff1a\u67e5\u8be2\u4f5c\u8005rose\u51fa\u7248\u7684\u6240\u6709\u4e66\u7c4d\uff0c\u5982\u679c\u6211\u4eec\u9009\u53d6\u7684\u57fa\u8868\u662fBook\uff0c\u90a3\u4e48\u5c31\u6210\u4e86\u6b63\u5411\u67e5\u8be2\uff0c\u5e94\u8be5\u7528\u6b63\u5411\u67e5\u8be2\u7684\u8bed\u6cd5\nres=Book.objects.filter(authors__name='rose').values('title')\nprint(res) # <QuerySet [{'title': '\u7389\u5973\u5fc3\u7ecf'}, {'title': '\u4e5d\u9634\u771f\u7ecf'}, {'title': '\u7389\u7537\u5fc3\u7ecf'}]><\/code><\/pre>\n2\u3001\u8fde\u7eed\u8de8>2\u5f20\u8868\u67e5\u8be2<\/h4>\n
\u8fde\u7eed\u8de8>2\u5f20\u8868\u7684\u64cd\u4f5c\u7684\u5957\u8def\u4e0e\u4e0a\u9762\u7684\u6848\u4f8b\u90fd\u662f\u4e00\u6837\u7684,\u53ef\u4ee5\u8fde\u7eed\u63a5n\u4e2a\u53cc\u4e0b\u5212\u7ebf\uff0c\u53ea\u9700\u8981\u5728\u6bcf\u6b21\u8fde\u53cc\u4e0b\u5212\u7ebf\u65f6\uff0c\u786e\u5b9a\u662f\u6b63\u5411\u8fd8\u662f\u53cd\u5411\u5373\u53ef<\/p>\n
# \u9700\u6c421\uff1a\u67e5\u8be2\u5317\u4eac\u51fa\u7248\u793e\u51fa\u7248\u8fc7\u7684\u6240\u6709\u4e66\u7c4d\u7684\u540d\u5b57\u4ee5\u53ca\u4f5c\u8005\u7684\u59d3\u540d\u3001\u624b\u673a\u53f7\n# \u65b9\u5f0f\u4e00\uff1a\u57fa\u8868\u4e3aPublish\nres=Publish.objects.filter(name='\u5317\u4eac\u51fa\u7248\u793e').values_list('book__title','book__authors__name','book__authors__author_detail__tel')\n\n# \u65b9\u5f0f\u4e8c\uff1a\u57fa\u8868\u4e3aBook\nres=Book.objects.filter(publish__name='\u5317\u4eac\u51fa\u7248\u793e').values_list('title','authors__name','authors__author_detail__tel')\n\n# \u5faa\u73af\u6253\u5370\u7ed3\u679c\u5747\u4e3a\nfor obj in res:\n print(obj)\n'''\n\u8f93\u51fa\uff1a\n('\u8475\u82b1\u5b9d\u5178', 'egon', '18611312331')\n('\u83ca\u82b1\u5b9d\u5178', 'egon', '18611312331')\n('\u6843\u82b1\u5b9d\u5178', 'egon', '18611312331')\n('\u8475\u82b1\u5b9d\u5178', 'kevin', '15033413881')\n('\u83ca\u82b1\u5b9d\u5178', 'kevin', '15033413881')\n('\u6843\u82b1\u5b9d\u5178', 'kevin', '15033413881')\n('\u83ca\u82b1\u5b9d\u5178', 'rose', '13011453220')\n'''\n\n# \u9700\u6c422\uff1a\u67e5\u8be2\u624b\u673a\u53f7\u4ee5186\u5f00\u5934\u7684\u4f5c\u8005\u51fa\u7248\u8fc7\u7684\u6240\u6709\u4e66\u7c4d\u540d\u79f0\u4ee5\u53ca\u51fa\u7248\u793e\u540d\u79f0\n# \u65b9\u5f0f\u4e00\uff1a\u57fa\u8868\u4e3aAuthorDetail\nres=AuthorDetail.objects.filter(tel__startswith='186').values_list('author__book__title','author__book__publish__name')\n\n# \u65b9\u5f0f\u4e8c\uff1a\u57fa\u8868\u4e3aBook\nres=Book.objects.filter(authors__author_detail__tel__startswith='186').values_list('title','publish__name')\n\n# \u65b9\u5f0f\u4e09\uff1a\u57fa\u8868\u4e3aPublish\nres=Publish.objects.filter(book__authors__author_detail__tel__startswith='186').values_list('book__title','name')\n\n# \u5faa\u73af\u6253\u5370\u7ed3\u679c\u5747\u4e3a\nfor obj in res:\n print(obj)\n'''\n\u8f93\u51fa\uff1a\n('\u8475\u82b1\u5b9d\u5178', '\u5317\u4eac\u51fa\u7248\u793e')\n('\u83ca\u82b1\u5b9d\u5178', '\u5317\u4eac\u51fa\u7248\u793e')\n('\u6843\u82b1\u5b9d\u5178', '\u5317\u4eac\u51fa\u7248\u793e')\n('\u4e5d\u9634\u771f\u7ecf', '\u5927\u8fde\u51fa\u7248\u793e')\n'''<\/code><\/pre>\n<\/div><\/p>\n","protected":false},"excerpt":{"rendered":"
Django\u4e4b\u6a21\u578b\u5c42\u7b2c\u4e8c\u7bc7\uff1a\u591a\u8868\u64cd\u4f5c \u4e00 \u8868\u5173\u7cfb\u56de\u987e \u200b \u5728\u8bb2\u89e3MySQL\u65f6\uff0c\u6211\u4eec\u63d0\u5230\uff0c\u628a\u5e94\u7528\u7a0b\u5e8f\u7684\u6240\u6709\u6570\u636e\u90fd […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[385,389],"tags":[],"_links":{"self":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts\/5783"}],"collection":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5783"}],"version-history":[{"count":0,"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts\/5783\/revisions"}],"wp:attachment":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5783"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5783"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5783"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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<\/div><\/p>\n","protected":false},"excerpt":{"rendered":"