{"id":23802,"date":"2024-11-21T14:03:51","date_gmt":"2024-11-21T06:03:51","guid":{"rendered":"https:\/\/fwq.ai\/blog\/23802\/"},"modified":"2024-11-21T14:03:51","modified_gmt":"2024-11-21T06:03:51","slug":"laravel%e6%9f%a5%e8%af%a2%e4%b8%80%e4%b8%aa%e5%80%bc-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/23802\/","title":{"rendered":"laravel\u67e5\u8be2\u4e00\u4e2a\u503c"},"content":{"rendered":"

\u5728 laravel \u4e2d\uff0c\u67e5\u8be2\u4e00\u4e2a\u503c\u53ef\u4ee5\u4f7f\u7528 value() \u65b9\u6cd5\u3002<\/p>\n

\u8be5\u65b9\u6cd5\u5c06\u8fd4\u56de\u67e5\u8be2\u7ed3\u679c\u7684\u7b2c\u4e00\u884c\u7b2c\u4e00\u5217\u7684\u503c\uff0c\u4e5f\u5c31\u662f\u4e00\u4e2a\u5355\u4e00\u7684\u503c\u3002<\/p>\n

\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u540d\u4e3a users \u7684\u6570\u636e\u8868\uff0c\u5176\u4e2d\u5305\u542b\u6709\u4ee5\u4e0b\u5b57\u6bb5\uff1a id\uff0cname\uff0cemail \u548c birthday\uff0c\u73b0\u5728\u60f3\u67e5\u8be2\u8be5\u6570\u636e\u8868\u4e2d id \u4e3a 1 \u7684\u7528\u6237\u59d3\u540d\uff0c\u5728 Laravel \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u5b9e\u73b0\uff1a<\/p>\n

$name = DB::table('users')-&gt;where('id', 1)-&gt;value('name');<\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
\u4e0a\u9762\u7684\u4ee3\u7801\u4f7f\u7528\u4e86\u67e5\u8be2\u6784\u5efa\u5668\u7684 where() \u548c value() \u65b9\u6cd5\uff0c\u5176\u4e2d\uff0cwhere() \u65b9\u6cd5\u7528\u4e8e\u7b5b\u9009\u6761\u4ef6\uff0cvalue() \u65b9\u6cd5\u7528\u4e8e\u8fd4\u56de\u67e5\u8be2\u7ed3\u679c\u7684\u7b2c\u4e00\u884c\u7b2c\u4e00\u5217\u7684\u503c\u3002\u4ee5\u4e0a\u4ee3\u7801\u5c06\u8fd4\u56de id \u4e3a 1 \u7684\u7528\u6237\u7684\u59d3\u540d\u3002<\/p>\n
\u6b64\u5916\uff0c\u5bf9\u4e8e\u53ea\u9700\u8981\u67e5\u8be2\u4e00\u4e2a\u503c\u7684\u60c5\u51b5\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528 pluck() \u65b9\u6cd5\u3002<\/p>\n
$name = DB::table('users')-&gt;where('id', 1)-&gt;pluck('name');<\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
pluck() \u65b9\u6cd5\u4e0e value() \u65b9\u6cd5\u76f8\u4f3c\uff0c\u4e5f\u53ef\u4ee5\u8fd4\u56de\u67e5\u8be2\u7ed3\u679c\u7684\u7b2c\u4e00\u884c\u7b2c\u4e00\u5217\u7684\u503c\uff0c\u4f46\u662f pluck() \u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u662f\u4e00\u4e2a Collection \u5bf9\u8c61\u3002\u5982\u679c\u53ea\u9700\u8981\u83b7\u53d6\u5355\u4e00\u7684\u503c\uff0c\u8fd8\u9700\u8981\u4f7f\u7528 Collection \u5bf9\u8c61\u7684 first() \u65b9\u6cd5\uff0c\u4f8b\u5982\uff1a<\/p>\n
$name = DB::table('users')-&gt;where('id', 1)-&gt;pluck('name')-&gt;first();<\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
\u4ee5\u4e0a\u4ee3\u7801\u540c\u6837\u53ef\u4ee5\u8fd4\u56de id \u4e3a 1 \u7684\u7528\u6237\u7684\u59d3\u540d\u3002<\/p>\n
\u603b\u7ed3\u4e00\u4e0b\uff0c\u67e5\u8be2\u4e00\u4e2a\u503c\u5728 Laravel \u4e2d\u975e\u5e38\u7b80\u5355\uff0c\u53ea\u9700\u8981\u4f7f\u7528\u67e5\u8be2\u6784\u5efa\u5668\u7684 value() \u65b9\u6cd5\u6216\u8005 pluck() \u65b9\u6cd5\u5373\u53ef\u3002\u5728\u4f7f\u7528\u7684\u8fc7\u7a0b\u4e2d\uff0c\u9700\u8981\u6839\u636e\u5b9e\u9645\u9700\u6c42\u6765\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u3002<\/p>\n
\u4ee5\u4e0a\u5c31\u662flaravel\u67e5\u8be2\u4e00\u4e2a\u503c\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":"
\u5728 laravel \u4e2d\uff0c\u67e5\u8be2\u4e00\u4e2a\u503c\u53ef\u4ee5\u4f7f\u7528 value() \u65b9\u6cd5\u3002 \u8be5\u65b9\u6cd5\u5c06\u8fd4\u56de\u67e5\u8be2\u7ed3\u679c\u7684\u7b2c\u4e00\u884c\u7b2c\u4e00\u5217\u7684\u503c\uff0c\u4e5f\u5c31\u662f\u4e00\u4e2a\u5355\u4e00\u7684\u503c\u3002 \u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u540d\u4e3a users \u7684\u6570\u636e\u8868\uff0c\u5176\u4e2d\u5305\u542b\u6709\u4ee5\u4e0b\u5b57\u6bb5\uff1a id\uff0cname\uff0cemail \u548c birthday\uff0c\u73b0\u5728\u60f3\u67e5\u8be2\u8be5\u6570\u636e\u8868\u4e2d id \u4e3a 1 \u7684\u7528\u6237\u59d3\u540d\uff0c\u5728 Laravel \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u5b9e\u73b0\uff1a $name = DB::table(‘users’)-&gt;where(‘id’, 1)-&gt;value(‘name’); \u767b\u5f55\u540e\u590d\u5236 \u4e0a\u9762\u7684\u4ee3\u7801\u4f7f\u7528\u4e86\u67e5\u8be2\u6784\u5efa\u5668\u7684 where() \u548c value() \u65b9\u6cd5\uff0c\u5176\u4e2d\uff0cwhere() \u65b9\u6cd5\u7528\u4e8e\u7b5b\u9009\u6761\u4ef6\uff0cvalue() \u65b9\u6cd5\u7528\u4e8e\u8fd4\u56de\u67e5\u8be2\u7ed3\u679c\u7684\u7b2c\u4e00\u884c\u7b2c\u4e00\u5217\u7684\u503c\u3002\u4ee5\u4e0a\u4ee3\u7801\u5c06\u8fd4\u56de id \u4e3a 1 \u7684\u7528\u6237\u7684\u59d3\u540d\u3002 \u6b64\u5916\uff0c\u5bf9\u4e8e\u53ea\u9700\u8981\u67e5\u8be2\u4e00\u4e2a\u503c\u7684\u60c5\u51b5\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528 pluck() \u65b9\u6cd5\u3002 $name = DB::table(‘users’)-&gt;where(‘id’, 1)-&gt;pluck(‘name’); \u767b\u5f55\u540e\u590d\u5236 pluck() \u65b9\u6cd5\u4e0e value() \u65b9\u6cd5\u76f8\u4f3c\uff0c\u4e5f\u53ef\u4ee5\u8fd4\u56de\u67e5\u8be2\u7ed3\u679c\u7684\u7b2c\u4e00\u884c\u7b2c\u4e00\u5217\u7684\u503c\uff0c\u4f46\u662f pluck() \u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u662f\u4e00\u4e2a Collection \u5bf9\u8c61\u3002\u5982\u679c\u53ea\u9700\u8981\u83b7\u53d6\u5355\u4e00\u7684\u503c\uff0c\u8fd8\u9700\u8981\u4f7f\u7528 Collection \u5bf9\u8c61\u7684 first() \u65b9\u6cd5\uff0c\u4f8b\u5982\uff1a $name […]<\/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-23802","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/23802","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=23802"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/23802\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=23802"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=23802"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=23802"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}