{"id":10006489,"date":"2022-09-15T12:43:47","date_gmt":"2022-09-15T04:43:47","guid":{"rendered":"https:\/\/ityet.com\/?p=10006489"},"modified":"2022-09-15T12:43:47","modified_gmt":"2022-09-15T04:43:47","slug":"%e5%a4%b4%e5%a4%a7%e4%ba%86%ef%bc%8cmysql%e5%86%99%e5%85%a5%e6%95%b0%e6%8d%ae%e5%8d%81%e5%87%a0%e7%a7%92%e5%90%8e%e8%a2%ab%e8%87%aa%e5%8a%a8%e5%88%a0%e9%99%a4%e4%ba%86","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10006489","title":{"rendered":"\u5934\u5927\u4e86\uff0cMysql\u5199\u5165\u6570\u636e\u5341\u51e0\u79d2\u540e\u88ab\u81ea\u52a8\u5220\u9664\u4e86"},"content":{"rendered":"<p>\u6700\u8fd1\u9047\u4e0a\u4e86\u4e00\u4ef6\u56f0\u6270\u4e86\u6211\u597d\u51e0\u5929\u7684\u4e00\u4e2a\u95ee\u9898\uff0c\u4e3a\u6b64\u6392\u67e5\u4e86\u4e00\u6574\u5929\u90fd\u65e0\u529f\u800c\u8fd4\uff0c\u60f3\u5230\u8fd9\u611f\u89c9\u771f\u5bf9\u4e0d\u8d77\u8001\u677f\uff0c\u4e00\u5929\u4e00\u884c\u4ee3\u7801\u6ca1\u5199\uff0c\u5565\u4e5f\u6ca1\u505a\u6210\u3002<\/p>\n<h3>\u80cc\u666f<\/h3>\n<p>\u4e8b\u60c5\u662f\u8fd9\u6837\u7684\uff0c\u5728\u516c\u53f8\u5185\u90e8\u65b0\u5f00\u53d1\u4e86\u4e00\u4e2a\u529f\u80fd\u8fd8\u6ca1\u6709\u4e0a\u7ebf\uff0c\u76ee\u524d\u90e8\u7f72\u5728\u6d4b\u8bd5\u73af\u5883\uff0cNode\u670d\u52a1\u4f1a\u5f00\u542f\u4e00\u4e2a\u5b9a\u65f6\u4efb\u52a1\uff0c\u6bcf5\u5206\u949f\u4f1a\u5904\u7406\u597d\u4e00\u90e8\u5206\u6570\u636e\u5199\u5165\u5230mysql\u6570\u636e\u5e93\u4e2d\u3002<\/p>\n<p>\u5728\u8fd9\u4e4b\u524d\uff0c\u4e00\u5207\u90fd\u8fd0\u884c\u6b63\u5e38\uff0c\u4e2d\u79cb\u8282\u540e\u4e0a\u73ed\u7b2c\u4e00\u5929\u6253\u5f00\u540e\u53f0\u7cfb\u7edf\u53d1\u73b0\u6ca1\u6709\u6570\u636e\u5c55\u793a\u4e86\uff0c\u7136\u540e\u67e5\u8be2\u6570\u636e\u5e93\u53d1\u73b0\u5386\u53f2\u5b58\u50a8\u7684\u6570\u636e\u90fd\u6ca1\u4e86\uff0c\u6ca1\u4e86\u3002\u73b0\u5728\u53ea\u4f1a\u5b58\u50a8\u6700\u65b0\u7684\u5b9a\u65f6\u4efb\u52a1\u6267\u884c\u540e\u7684\u6570\u636e\u3002\u53ef\u5728\u6b64\u4e4b\u95f4\u6ca1\u6709\u4fee\u6539\u8fc7\u4efb\u4f55\u4ee3\u7801\uff0c\u8fd9\u4e2a\u5c31\u795e\u5947\u4e86\u3002<\/p>\n<h3>\u5934\u75bc\u65f6\u95f4<\/h3>\n<p>\u67e5\u770b\u5199\u5165\u7684\u6570\u636e\u59cb\u7ec8\u90fd\u53ea\u4f1a\u5b58\u50a8\u6700\u65b0\u7684\u6570\u636e\uff0c\u5219\u68c0\u67e5\u662f\u5426\u6ca1\u6709\u89e6\u53d1\u66f4\u65b0\u7684\u903b\u8f91\uff0c\u5168\u90e8\u90fd\u547d\u4e2d\u65b0\u589e\u7684\u903b\u8f91\u3002<\/p>\n<pre><code class=\"javascript\">const isExist = await this.Model.findOne({\n  where: {\n    projectId\n  }\n});\nif (isExist) {\n  await isExist.destroy()\n  updateList.push(item)\n} else {\n  createList.push(item)\n}<\/code><\/pre>\n<p>\u73b0\u5728\u7684\u903b\u8f91\u662f\u5c06\u65b0\u589e\u548c\u66f4\u65b0\u5206\u5f00\u5904\u7406\uff0c\u7ecf\u68c0\u67e5\u53d1\u73b0\u6240\u6709\u7684isExist\u90fd\u662fnull\uff0c\u5bfc\u81f4\u5168\u90e8\u547d\u4e2d\u65b0\u589e\u7684\u903b\u8f91\u3002\u53ef\u662f\u6570\u636e\u5e93\u4e2d\u660e\u660e\u662f\u6709\u6570\u636e\u7684\uff0c\u4e3a\u4ec0\u4e48\u67e5\u8be2\u4e0d\u51fa\u6765\u5462\uff1f\u6000\u7591\u662f\u6709\u7b2c\u4e09\u65b9\u6570\u636e\u5b58\u5728\u810f\u6570\u636e\u4e4b\u7c7b\u7684\u60c5\u51b5\uff0c\u6240\u4ee5\u6211\u5c06\u6570\u636e\u5e93\u73b0\u5b58\u6570\u636e\u5168\u90e8\u6e05\u7a7a\uff0c\u91cd\u65b0\u5199\u5165\u67e5\u770b\u6548\u679c\u3002\u7ed3\u679c\u7b2c\u4e00\u6b21\u5199\u5165\u662f\u6b63\u5e38\u7684\uff0c\u540e\u7eed\u8fd8\u662f\u4e0d\u4f1a\u89e6\u53d1\u66f4\u65b0\uff0c\u7ecf\u8fc7\u67e5\u8be2\u53d1\u73b0\u6bcf\u6b21\u5199\u5165\u6570\u636e\u5e93\u5927\u7ea6\u5341\u51e0\u79d2\u6570\u636e\u5c31\u88ab\u6e05\u7a7a\u4e86\u3002<\/p>\n<p>\u53ef\u662f\u5728\u5199\u5165\u540e\u7684\u4ee3\u7801\u903b\u8f91\u4e2d\u662f\u6ca1\u6709\u6267\u884c\u5220\u9664\u6570\u636e\u7684\u5904\u7406\uff0c\u800c\u4e14\u6bcf\u6b21\u90fd\u662f\u7a33\u5b9a\u590d\u73b0\uff0c\u5199\u5165\u540e\u5c31\u88ab\u5220\u9664\u4e86\uff0c\u67e5\u8be2\u65e0\u679c\u65e0\u5948\u627e\u5230db\u5e2e\u627e\u539f\u56e0\u3002db\u67e5\u8be2\u65e5\u5fd7\u7ed9\u51fa\u7684\u7ed3\u8bba\u5c31\u662f\u6709\u5b9a\u65f6\u6267\u884c\u5220\u9664\u7684\u903b\u8f91\u3002<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042484446\" alt=\"\" title=\"\" loading=\"lazy\"><br \/>\u770b\u5230\u65e5\u5fd7\u53ea\u80fd\u7ee7\u7eed\u5728\u4ee3\u7801\u4e2d\u627e\u539f\u56e0\u4e86\u3002\u7531\u4e8e\u6b64\u65f6\u662f\u4f7f\u7528\u7684 sequelize \u7684 bulkCreate \u6279\u91cf\u521b\u5efa\u6570\u636e\uff0c\u6240\u4ee5\u5f00\u59cb\u6000\u7591\u662f\u4e0d\u662f\u8fd9\u4e2a\u6279\u91cf\u5904\u7406\u7684\u8fc7\u7a0b\u4e2d\u51fa\u73b0\u4e86\u95ee\u9898\uff0c\u5f53\u521d\u662f\u56e0\u4e3a\u6bcf\u6b21\u6267\u884c\u7684\u6570\u636e\u91cf\u592a\u591a\u6240\u4ee5\u6ca1\u6709\u9009\u62e9\u5355\u6761\u6267\u884c\uff0c\u8fd9\u4e2a\u65f6\u5019\u4e3a\u4e86\u6392\u67e5\u95ee\u9898\uff0c\u6240\u4ee5\u6211\u6539\u6210\u4e86\u5355\u6761\u6570\u636e create \u65b9\u5f0f\u521b\u5efa\u6570\u636e\u3002<\/p>\n<pre><code class=\"javascript\">this.Model.bulkCreate(list)<\/code><\/pre>\n<p>\u4fee\u6539\u4e3a<\/p>\n<pre><code class=\"javascript\">for (const item of list) {\n  this.Model.create(item)     \n}<\/code><\/pre>\n<p>\u7ed3\u679c\u4e0d\u51fa\u610f\u5916\u7684\u8fd8\u662f\u5b9a\u65f6\u88ab\u5220\u9664\u4e86\uff0c\ud83d\ude2d<br \/>\u7136\u540e\u5f00\u59cb\u6000\u7591\u662f\u4e8b\u52a1\u6ca1\u6709\u63d0\u4ea4\u7684\u95ee\u9898\uff0c\u867d\u7136\u6b64\u903b\u8f91\u662f\u5b8c\u5168\u4e0d\u9700\u8981\u7528\u5230\u4e8b\u52a1\u64cd\u4f5c\uff0c\u4f46\u8fd8\u662f\u62b1\u7740\u6000\u7591\u7684\u5fc3\u6001\u8bd5\u8bd5\u770b\u3002<\/p>\n<pre><code class=\"javascript\">let transaction;\ntry {\n  \/\/ \u5efa\u7acb\u4e8b\u52a1\u5bf9\u8c61\n  transaction = await this.ctx.model.transaction();\n  for (const item of list) {\n    \/\/ \u4e8b\u52a1\u589e\u64cd\u4f5c\n    await this.Model.create(item, {\n        transaction,\n    });\n    \/\/ \u63d0\u4ea4\u4e8b\u52a1\n    await transaction.commit();\n  }\n} catch (err) {\n    \/\/ \u4e8b\u52a1\u56de\u6eda\n    await transaction.rollback();\n}<\/code><\/pre>\n<p>\u7ed3\u679c\u4e0d\u51fa\u610f\u5916\u7684\u8fd8\u662f\u5b9a\u65f6\u88ab\u5220\u9664\u4e86\uff0c\ud83d\ude2d\ud83d\ude2d\ud83d\ude2d\u6b64\u65f6\u5df2\u7ecf\u6ca1\u6709\u6539\u52a8\u7684\u4f59\u5730\u4e86\uff0c\u6b64\u65f6\u7684\u5929\u90fd\u5df2\u7ecf\u9ed1\u4e86\uff0c\u53ef\u662f\u95ee\u9898\u8fd8\u6ca1\u89e3\u51b3\uff0c\u53ea\u80fd\u7ee7\u7eed\u9762\u5411\u767e\u5ea6\u7f16\u7a0b\u4e86\uff0c\u6b64\u65f6\u641c\u7d22\u5230\u4e5f\u6709\u540c\u4e00\u4e2a\u4eba\u9047\u5230\u8fd9\u6837\u7684\u95ee\u9898\uff0c\u4ed6\u7684\u89e3\u51b3\u65b9\u6848\u662f\u4fee\u6539\u8868\u540d\u79f0\uff0c\u8fd9\u65f6\u5019\u4e5f\u53ea\u80fd\u6b7b\u9a6c\u5f53\u4f5c\u6d3b\u9a6c\u533b\u4e86\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042484447\" alt=\"\" title=\"\" 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nanchengfe\uff09<\/strong><\/p>\n<p><a href=\"https:\/\/segmentfault.com\/a\/1190000042484444\">https:\/\/segmentfault.com\/a\/1190000042484444<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6700\u8fd1\u9047\u4e0a\u4e86\u4e00\u4ef6\u56f0\u6270\u4e86\u6211\u597d\u51e0\u5929\u7684\u4e00\u4e2a\u95ee\u9898\uff0c\u4e3a\u6b64\u6392\u67e5\u4e86\u4e00\u6574\u5929\u90fd\u65e0\u529f\u800c\u8fd4\uff0c\u60f3\u5230\u8fd9\u611f\u89c9\u771f\u5bf9\u4e0d\u8d77\u8001\u677f\uff0c\u4e00\u5929\u4e00\u884c\u4ee3\u7801\u6ca1\u5199\uff0c 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