{"id":23846,"date":"2024-11-21T12:42:45","date_gmt":"2024-11-21T04:42:45","guid":{"rendered":"https:\/\/fwq.ai\/blog\/23846\/"},"modified":"2024-11-21T12:42:45","modified_gmt":"2024-11-21T04:42:45","slug":"yii%e6%a1%86%e6%9e%b6%e4%b8%ad%e7%9a%84dbar%ef%bc%9a%e6%9b%b4%e7%ae%80%e5%8d%95%e5%9c%b0%e4%bd%bf%e7%94%a8%e6%95%b0%e6%8d%ae%e5%ba%93","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/23846\/","title":{"rendered":"Yii\u6846\u67b6\u4e2d\u7684DBAR\uff1a\u66f4\u7b80\u5355\u5730\u4f7f\u7528\u6570\u636e\u5e93"},"content":{"rendered":"

yii\u6846\u67b6\u662f\u4e00\u5957\u4f18\u79c0\u7684php\u6846\u67b6\uff0c\u5df2\u7ecf\u6210\u4e3a\u8bb8\u591aweb\u5f00\u53d1\u4eba\u5458\u7684\u9996\u9009\u4e4b\u4e00\u3002\u5176\u4e2d\uff0c\u6570\u636e\u5e93\u5bf9\u4e8eweb\u5e94\u7528\u6765\u8bf4\u662f\u975e\u5e38\u91cd\u8981\u7684\u7ec4\u6210\u90e8\u5206\u4e4b\u4e00\u3002\u5728yii\u6846\u67b6\u4e2d\uff0cdbar\u5c31\u662f\u4e00\u4e2a\u5c01\u88c5\u4e86\u6570\u636e\u5e93\u67e5\u8be2\u64cd\u4f5c\u7684\u7ec4\u4ef6\uff0c\u901a\u8fc7\u5b83\uff0c\u6211\u4eec\u53ef\u4ee5\u66f4\u7b80\u5355\u5730\u4f7f\u7528\u6570\u636e\u5e93\u3002<\/p>\n

DBAR\u662f\u6307\u201cDatabase Access Object\u201d\uff0c\u9996\u5148\u5b83\u662f\u4e00\u4e2a\u5728Yii\u6846\u67b6\u4e2d\u5c01\u88c5\u4e86\u6570\u636e\u5e93\u67e5\u8be2\u7684\u7ec4\u4ef6\u3002\u5176\u6b21\uff0c\u5b83\u5c06\u67e5\u8be2\u6761\u4ef6\u548c\u67e5\u8be2\u7ed3\u679c\u5206\u79bb\u5f00\uff0c\u5e76\u91c7\u7528\u4e86\u94fe\u5f0f\u7f16\u7a0b\u7684\u65b9\u5f0f\u6765\u6784\u5efa\u67e5\u8be2\u8bed\u53e5\u3002\u6700\u540e\uff0cDBAR\u8fd8\u53ef\u4ee5\u4f7f\u7528\u7c7b\u4f3c\u4e8eSQL\u7684\u65b9\u5f0f\u6765\u6784\u5efa\u67e5\u8be2\u3002<\/p>\n

\u4f7f\u7528DBAR\u6765\u8fdb\u884c\u6570\u636e\u67e5\u8be2\uff0c\u9700\u8981\u9996\u5148\u901a\u8fc7Yii\u6846\u67b6\u7684\u7ec4\u4ef6\u914d\u7f6e\u6587\u4ef6\uff08\u4f8b\u5982\uff1amain.php\uff09\u6765\u914d\u7f6e\u597d\u6570\u636e\u5e93\u8fde\u63a5\u53c2\u6570\u3002\u4e0b\u9762\u6211\u4eec\u770b\u4e00\u4e0b\u5982\u4f55\u8fdb\u884c\u914d\u7f6e\uff1a<\/p>\n

return [\n    \/\/ ...\n    'components' =&gt; [\n        'db' =&gt; [\n            'class' =&gt; 'yiidbConnection',\n            'dsn' =&gt; 'mysql:host=localhost;dbname=mydatabase',\n            'username' =&gt; 'root',\n            'password' =&gt; '',\n            'charset' =&gt; 'utf8',\n        ],\n        'db2' =&gt; [\n            'class' =&gt; 'yiidbConnection',\n            'dsn' =&gt; 'mysql:host=localhost;dbname=mydatabase2',\n            'username' =&gt; 'root',\n            'password' =&gt; '',\n            'charset' =&gt; 'utf8',\n        ],\n        \/\/ ...\n    ],\n];<\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
\u4e0a\u9762\u7684\u4ee3\u7801\u5c55\u793a\u4e86\u5982\u4f55\u914d\u7f6eYii\u6846\u67b6\u4e2d\u7684\u6570\u636e\u5e93\u8fde\u63a5\u53c2\u6570\u3002\u8bf7\u6ce8\u610f\uff0c\u8fd9\u91cc\u6211\u4eec\u53ef\u4ee5\u914d\u7f6e\u591a\u4e2a\u6570\u636e\u5e93\u8fde\u63a5\u53c2\u6570\uff0c\u6bcf\u4e2a\u6570\u636e\u5e93\u8fde\u63a5\u90fd\u6709\u4e00\u4e2a\u72ec\u7acb\u7684\u540d\u79f0\uff0c\u4ee5\u4fbf\u5728\u64cd\u4f5c\u65f6\u9009\u62e9\u8981\u4f7f\u7528\u7684\u6570\u636e\u5e93\u8fde\u63a5\u3002<\/p>\n
\u6211\u4eec\u4f7f\u7528Yii\u7684DBAR\u7ec4\u4ef6\u6765\u8bbf\u95ee\u6570\u636e\u5e93\u65f6\uff0c\u53ef\u4ee5\u901a\u8fc7Yii::$app->db\u6216Yii::$app->get(‘db’)\u6765\u83b7\u53d6\u6570\u636e\u5e93\u8fde\u63a5\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528DBAR\u6765\u8fdb\u884cselect,update,insert,delete\u7b49\u64cd\u4f5c\u3002<\/p>\n
\u5173\u4e8eselect\u64cd\u4f5c\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5982\u4e0b\u4ee3\u7801\u6765\u8fdb\u884c\u4e00\u4e2a\u7b80\u5355\u7684\u67e5\u8be2\uff1a<\/p>\n
$posts = Yii::$app-&gt;db-&gt;createCommand('SELECT * FROM posts')-&gt;queryAll();<\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
DBAR\u8fd8\u652f\u6301\u4f7f\u7528\u94fe\u5f0f\u7f16\u7a0b\u7684\u65b9\u5f0f\u6765\u6784\u5efa\u67e5\u8be2\u8bed\u53e5\uff0c\u4f8b\u5982\uff1a<\/p>\n
$posts = Yii::$app-&gt;db-&gt;createCommand()\n    -&gt;select('title, content')\n    -&gt;from('posts')\n    -&gt;where(['status' =&gt; 1])\n    -&gt;orderBy('id DESC')\n    -&gt;limit(10)\n    -&gt;queryAll();<\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u4e86\u67e5\u8be2\u6784\u5efa\u5668createCommand()\u65b9\u6cd5\uff0c\u5e76\u4e14\u94fe\u5f0f\u7684\u8c03\u7528\u4e86select()\u3001from()\u3001where()\u3001orderBy()\u548climit()\u7b49\u65b9\u6cd5\u3002\u8fd9\u6837\u5c31\u53ef\u4ee5\u6784\u5efa\u51fa\u975e\u5e38\u7b80\u5355\u7684\u67e5\u8be2\u8bed\u53e5\u3002<\/p>\n
insert\u548cupdate\u7684\u64cd\u4f5c\u53ef\u4ee5\u4f7f\u7528\u5982\u4e0b\u4ee3\u7801\u8fdb\u884c\uff1a<\/p>\n
Yii::$app-&gt;db-&gt;createCommand()-&gt;insert('user', [\n    'name' =&gt; 'user1',\n])-&gt;execute();\n\nYii::$app-&gt;db-&gt;createCommand()-&gt;update('user', [\n    'name' =&gt; 'user2',\n], 'age &gt; 20')-&gt;execute();<\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
delete\u7684\u64cd\u4f5c\u53ef\u4ee5\u4f7f\u7528\u5982\u4e0b\u4ee3\u7801\u8fdb\u884c\uff1a<\/p>\n
Yii::$app-&gt;db-&gt;createCommand()-&gt;delete('user', 'age &gt; 20')-&gt;execute();<\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
Yii\u6846\u67b6\u4e2d\u7684DBAR\u8ba9\u6211\u4eec\u53ef\u4ee5\u66f4\u65b9\u4fbf\u5730\u4f7f\u7528\u6570\u636e\u5e93\uff0c\u5c24\u5176\u662f\u5728\u6784\u5efa\u7b80\u5355\u7684\u67e5\u8be2\u8bed\u53e5\u65f6\u975e\u5e38\u65b9\u4fbf\uff0c\u540c\u65f6\u4e5f\u53ef\u4ee5\u4f7f\u7528\u94fe\u5f0f\u7f16\u7a0b\u7684\u65b9\u5f0f\u6765\u6784\u5efa\u66f4\u52a0\u590d\u6742\u7684\u67e5\u8be2\u8bed\u53e5\u3002 \u603b\u4e4b\uff0cDBAR\u662f\u4e00\u4e2a\u975e\u5e38\u5f3a\u5927\u4e14\u6613\u4e8e\u4f7f\u7528\u7684\u7ec4\u4ef6\uff0c\u5982\u679c\u60a8\u6b63\u5728\u5f00\u53d1\u4e00\u4e2aYii\u6846\u67b6\u7684web\u5e94\u7528\u7a0b\u5e8f\uff0c\u5e76\u4e0e\u6570\u636e\u5e93\u4ea4\u4e92\uff0c\u8bf7\u4e00\u5b9a\u8981\u5c1d\u8bd5\u4f7f\u7528DBAR\u6765\u8fdb\u884c\u6570\u636e\u64cd\u4f5c\uff0c\u76f8\u4fe1\u60a8\u4e00\u5b9a\u4f1a\u7231\u4e0a\u5b83\uff01<\/p>\n
\u4ee5\u4e0a\u5c31\u662fYii\u6846\u67b6\u4e2d\u7684DBAR\uff1a\u66f4\u7b80\u5355\u5730\u4f7f\u7528\u6570\u636e\u5e93\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
yii\u6846\u67b6\u662f\u4e00\u5957\u4f18\u79c0\u7684php\u6846\u67b6\uff0c\u5df2\u7ecf\u6210\u4e3a\u8bb8\u591aweb\u5f00\u53d1\u4eba\u5458\u7684\u9996\u9009\u4e4b\u4e00\u3002\u5176\u4e2d\uff0c\u6570\u636e\u5e93\u5bf9\u4e8eweb\u5e94\u7528\u6765\u8bf4\u662f\u975e\u5e38\u91cd\u8981\u7684\u7ec4\u6210\u90e8\u5206\u4e4b\u4e00\u3002\u5728yii\u6846\u67b6\u4e2d\uff0cdbar\u5c31\u662f\u4e00\u4e2a\u5c01\u88c5\u4e86\u6570\u636e\u5e93\u67e5\u8be2\u64cd\u4f5c\u7684\u7ec4\u4ef6\uff0c\u901a\u8fc7\u5b83\uff0c\u6211\u4eec\u53ef\u4ee5\u66f4\u7b80\u5355\u5730\u4f7f\u7528\u6570\u636e\u5e93\u3002 DBAR\u662f\u6307\u201cDatabase Access Object\u201d\uff0c\u9996\u5148\u5b83\u662f\u4e00\u4e2a\u5728Yii\u6846\u67b6\u4e2d\u5c01\u88c5\u4e86\u6570\u636e\u5e93\u67e5\u8be2\u7684\u7ec4\u4ef6\u3002\u5176\u6b21\uff0c\u5b83\u5c06\u67e5\u8be2\u6761\u4ef6\u548c\u67e5\u8be2\u7ed3\u679c\u5206\u79bb\u5f00\uff0c\u5e76\u91c7\u7528\u4e86\u94fe\u5f0f\u7f16\u7a0b\u7684\u65b9\u5f0f\u6765\u6784\u5efa\u67e5\u8be2\u8bed\u53e5\u3002\u6700\u540e\uff0cDBAR\u8fd8\u53ef\u4ee5\u4f7f\u7528\u7c7b\u4f3c\u4e8eSQL\u7684\u65b9\u5f0f\u6765\u6784\u5efa\u67e5\u8be2\u3002 \u4f7f\u7528DBAR\u6765\u8fdb\u884c\u6570\u636e\u67e5\u8be2\uff0c\u9700\u8981\u9996\u5148\u901a\u8fc7Yii\u6846\u67b6\u7684\u7ec4\u4ef6\u914d\u7f6e\u6587\u4ef6\uff08\u4f8b\u5982\uff1amain.php\uff09\u6765\u914d\u7f6e\u597d\u6570\u636e\u5e93\u8fde\u63a5\u53c2\u6570\u3002\u4e0b\u9762\u6211\u4eec\u770b\u4e00\u4e0b\u5982\u4f55\u8fdb\u884c\u914d\u7f6e\uff1a return [ \/\/ … ‘components’ =&gt; [ ‘db’ =&gt; [ ‘class’ =&gt; ‘yiidbConnection’, ‘dsn’ =&gt; ‘mysql:host=localhost;dbname=mydatabase’, ‘username’ =&gt; ‘root’, ‘password’ =&gt; ”, ‘charset’ =&gt; ‘utf8’, ], ‘db2’ =&gt; [ ‘class’ =&gt; ‘yiidbConnection’, ‘dsn’ =&gt; ‘mysql:host=localhost;dbname=mydatabase2’, ‘username’ =&gt; ‘root’, ‘password’ =&gt; ”, ‘charset’ =&gt; ‘utf8’, ], \/\/ … ], ]; \u767b\u5f55\u540e\u590d\u5236 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-23846","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/23846","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=23846"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/23846\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=23846"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=23846"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=23846"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}