{"id":49221,"date":"2023-09-13T10:11:57","date_gmt":"2022-09-23T19:40:50","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e7%94%a8django%e8%bf%9b%e8%a1%8c%e6%95%b0%e6%8d%ae%e5%ba%93%e8%a7%84%e8%8c%83%e5%8c%96%e7%9a%84%e6%96%b9%e6%b3%95\/"},"modified":"2024-01-15T12:50:44","modified_gmt":"2024-01-15T04:50:44","slug":"%e7%94%a8django%e8%bf%9b%e8%a1%8c%e6%95%b0%e6%8d%ae%e5%ba%93%e8%a7%84%e8%8c%83%e5%8c%96%e7%9a%84%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e7%94%a8django%e8%bf%9b%e8%a1%8c%e6%95%b0%e6%8d%ae%e5%ba%93%e8%a7%84%e8%8c%83%e5%8c%96%e7%9a%84%e6%96%b9%e6%b3%95\/","title":{"rendered":"\u7528Django\u8fdb\u884c\u6570\u636e\u5e93\u89c4\u8303\u5316\u7684\u65b9\u6cd5"},"content":{"rendered":"

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\n\u4f7f\u7528\u5b83\u4f5c\u4e3a\u5174\u8da3\u7231\u597d\u7684\u670b\u53cb\u4eec\uff0c
\n\u521a\u521a\u5f00\u59cb\u5b66\u4e60\u7684\u5927\u5bb6\u597d\uff01<\/p>\n

\u6211\u662f22\u5c81\u7684kazukiniiyama\uff0c\u559c\u6b22\u4f7f\u7528Django\u8fdb\u884c\u5f00\u53d1\u3002<\/p>\n

\u4eca\u5929\uff0c\u6211\u8ba4\u4e3a\u5728\u4f7f\u7528Django\u8fdb\u884c\u6570\u636e\u5e93\u8bbe\u8ba1\u65f6\uff0c\u4f1a\u6709\u76f8\u5f53\u6570\u91cf\u7684\u4eba\u5bf9\u4e8e\u6b63\u89c4\u5316\u662f\u4ec0\u4e48\u6982\u5ff5\u611f\u5230\u56f0\u60d1\u3002<\/p>\n

\u5e0c\u671b\u80fd\u591f\u5bf9\u90a3\u4e9b\u4eba\u4eec\u7684\u529b\u91cf\u6709\u6240\u5e2e\u52a9\uff0c\u6211\u6574\u7406\u4e86\u4e00\u4e9b\u76f8\u5173\u7684\u4fe1\u606f\u3002<\/p>\n

\u5982\u679c\u6709\u4efb\u4f55\u9519\u8bef\u3001\u6307\u6b63\u6216\u4fee\u6b63\u9700\u8981\uff0c\u8bf7\u968f\u65f6\u544a\u8bc9\u6211\uff01<\/p>\n

\u53ea\u662f\u542c\u5230\u4f60\u7ed9\u51fa\u611f\u60f3\u5c31\u4f1a\u5f88\u5f00\u5fc3\uff0c\u671f\u5f85\u4f60\u7684\u8bc4\u8bba\u3002<\/p>\n

DB\u7684\u6b63\u89c4\u5316\u662f\u6307<\/h3>\n

\u6570\u636e\u5e93\u7684\u89c4\u8303\u5316\u662f\u6307\u4e3a\u4e86\u907f\u514d\u6570\u636e\u91cd\u590d\u800c\u5bf9\u6570\u636e\u5e93\u8fdb\u884c\u7ed3\u6784\u5316\u7684\u8fc7\u7a0b\u3002<\/p>\n

\u6b63\u898f\u5316\u7684\u7c21\u55ae\u6b65\u9a5f<\/h3>\n

\u7b2c\u4e00\u8303\u5f0f\uff081NF\uff09:<\/p>\n

\u5c06\u6570\u636e\u8868\u7ed3\u6784\u5316\u4ee5\u786e\u4fdd\u5404\u5217\u5177\u6709\u552f\u4e00\u7684\u503c\u3002<\/p>\n

\u5728Django\u4e2d\uff0c\u8fd9\u8868\u793a<\/p>\n

\u4f7f\u7528\u8fd9\u79cd\u65b9\u5f0f\u4e3a\u6bcf\u4e2a\u6a21\u578b\u5b57\u6bb5\u8bbe\u7f6e\u72ec\u7279\u7684\u503c\u3002<\/p>\n

\u7b2c\u4e8c\u6b63\u89c4\u5316\uff082NF\uff09\uff1a<\/p>\n

\u786e\u4fdd\u6240\u6709\u975e\u4e3b\u952e\u5217\u5b8c\u5168\u4f9d\u8d56\u4e8e\u4e3b\u952e\u3002\u5728Django\u4e2d\u5b9e\u73b0\u8fd9\u4e00\u70b9\uff0c<\/p>\n

\u4f7f\u7528ForeignKey\u6216OneToOneField\u6765\u5b9a\u4e49\u6a21\u578b\u4e4b\u95f4\u7684\u5173\u8054\u5173\u7cfb\u3002
\n\u7b2c\u4e09\u8303\u5f0f (3NF):<\/p>\n

\u5728\u4e2d\u6587\u4e2d\uff0c\u5bf9\u4e0a\u8ff0\u5185\u5bb9\u8fdb\u884c\u6539\u8ff0\u4e3a\uff1a<\/p>\n

\u786e\u4fdd\u975e\u5173\u952e\u5217\u4e0d\u4f9d\u8d56\u4e8e\u5176\u4ed6\u975e\u5173\u952e\u5217\u3002
\n\u5728Django\u4e2d\uff0c\u8fd9\u610f\u5473\u7740\u5c06\u6a21\u578b\u8fdb\u884c\u62c6\u5206\u5e76\u6d88\u9664\u4f9d\u8d56\u5173\u7cfb\u3002<\/p>\n

\u611f\u8c22\u5927\u5bb6\u9605\u8bfb\u8fd9\u4e2a\u7a0d\u5fae\u4e13\u4e1a\u4e00\u4e9b\u7684\u6b63\u89c4\u5316\u89e3\u91ca\u3002<\/p>\n

\u90a3\u4e48\uff0c\u8ba9\u6211\u4eec\u4f7f\u7528\u4ee3\u7801\u793a\u4f8b\u6765\u7b80\u5355\u590d\u4e60\u4e00\u4e0b\u5427\uff01<\/p>\n

Django\u4e2d\u7684\u6b63\u89c4\u5316\u793a\u4f8b<\/h3>\n

\u9019\u662f\u672a\u7d93\u6b63\u898f\u5316\u7684\u6a21\u578b\u7bc4\u4f8b\u3002<\/p>\n

from<\/span> django.db<\/span> import<\/span> models<\/span>\r\n\r\nclass<\/span> Person<\/span>(<\/span>models<\/span>.<\/span>Model<\/span>):<\/span>\r\n    name<\/span> =<\/span> models<\/span>.<\/span>CharField<\/span>(<\/span>max_length<\/span>=<\/span>100<\/span>)<\/span>\r\n    address<\/span> =<\/span> models<\/span>.<\/span>CharField<\/span>(<\/span>max_length<\/span>=<\/span>255<\/span>)<\/span>\r\n    city<\/span> =<\/span> models<\/span>.<\/span>CharField<\/span>(<\/span>max_length<\/span>=<\/span>100<\/span>)<\/span>\r\n    phone<\/span> =<\/span> models<\/span>.<\/span>CharField<\/span>(<\/span>max_length<\/span>=<\/span>15<\/span>)<\/span>\r\n    course_name<\/span> =<\/span> models<\/span>.<\/span>CharField<\/span>(<\/span>max_length<\/span>=<\/span>100<\/span>)<\/span>\r\n    course_fee<\/span> =<\/span> models<\/span>.<\/span>IntegerField<\/span>()<\/span>\r\n<\/code><\/pre>\n
\u5728\u4e0a\u8ff0\u7684\u6a21\u578b\u4e2d\uff0c\u4eba\u5458\u548c\u8bfe\u7a0b\u7684\u4fe1\u606f\u6df7\u5408\u5728\u4e00\u4e2a\u6a21\u578b\u4e2d\u3002<\/p>\n
\u9019\u662f\u4e00\u500b\u7d93\u904e\u6b63\u898f\u5316\u7684\u6a21\u578b\uff0c\u770b\u8d77\u4f86\u50cf\u9019\u6a23\u3002<\/p>\n
from<\/span> django.db<\/span> import<\/span> models<\/span>\r\n\r\nclass<\/span> Person<\/span>(<\/span>models<\/span>.<\/span>Model<\/span>):<\/span>\r\n    name<\/span> =<\/span> models<\/span>.<\/span>CharField<\/span>(<\/span>max_length<\/span>=<\/span>100<\/span>)<\/span>\r\n    address<\/span> =<\/span> models<\/span>.<\/span>CharField<\/span>(<\/span>max_length<\/span>=<\/span>255<\/span>)<\/span>\r\n    city<\/span> =<\/span> models<\/span>.<\/span>CharField<\/span>(<\/span>max_length<\/span>=<\/span>100<\/span>)<\/span>\r\n    phone<\/span> =<\/span> models<\/span>.<\/span>CharField<\/span>(<\/span>max_length<\/span>=<\/span>15<\/span>)<\/span>\r\n\r\nclass<\/span> Course<\/span>(<\/span>models<\/span>.<\/span>Model<\/span>):<\/span>\r\n    name<\/span> =<\/span> models<\/span>.<\/span>CharField<\/span>(<\/span>max_length<\/span>=<\/span>100<\/span>)<\/span>\r\n    fee<\/span> =<\/span> models<\/span>.<\/span>IntegerField<\/span>()<\/span>\r\n\r\nclass<\/span> Enrollment<\/span>(<\/span>models<\/span>.<\/span>Model<\/span>):<\/span>\r\n    person<\/span> =<\/span> models<\/span>.<\/span>ForeignKey<\/span>(<\/span>Person<\/span>,<\/span> on_delete<\/span>=<\/span>models<\/span>.<\/span>CASCADE<\/span>)<\/span>\r\n    course<\/span> =<\/span> models<\/span>.<\/span>ForeignKey<\/span>(<\/span>Course<\/span>,<\/span> on_delete<\/span>=<\/span>models<\/span>.<\/span>CASCADE<\/span>)<\/span>\r\n\r\n<\/code><\/pre>\n
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\u603b\u7ed3<\/h3>\n
\u5728Django\u4e2d\uff0c\u6570\u636e\u5e93\u7684\u89c4\u8303\u5316\u662f\u4e3a\u4e86\u51cf\u5c11\u6570\u636e\u7684\u91cd\u590d\u548c\u4fdd\u6301\u6570\u636e\u7684\u4e00\u81f4\u6027\u800c\u975e\u5e38\u91cd\u8981\u7684\u3002\u901a\u8fc7\u5728\u6a21\u578b\u8bbe\u8ba1\u65f6\u9075\u5faa\u89c4\u8303\u5316\u539f\u5219\uff0c\u53ef\u4ee5\u6784\u5efa\u51fa\u9ad8\u6548\u4e14\u6613\u4e8e\u7ba1\u7406\u7684\u6570\u636e\u5e93\uff0c\u9002\u5f53\u5730\u5efa\u7acb\u6a21\u578b\u548c\u5173\u7cfb\u3002<\/p>\n
\u7ed3\u675f\u3002<\/p>\n
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