{"id":1154,"date":"2024-12-24T14:58:50","date_gmt":"2024-12-24T06:58:50","guid":{"rendered":"http:\/\/www.chan.ink\/?p=1154"},"modified":"2024-12-24T14:58:53","modified_gmt":"2024-12-24T06:58:53","slug":"%e3%80%90djangoorm%e3%80%91auto_nowtrueauto_now_addtrue%e7%9a%84%e5%8c%ba%e5%88%ab","status":"publish","type":"post","link":"http:\/\/www.chan.ink\/index.php\/2024\/12\/24\/%e3%80%90djangoorm%e3%80%91auto_nowtrueauto_now_addtrue%e7%9a%84%e5%8c%ba%e5%88%ab\/","title":{"rendered":"\u3010Django|orm\u3011auto_now=True,auto_now_add=True\u7684\u533a\u522b"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u5728 Django \u7684\u6a21\u578b\u5b57\u6bb5\u4e2d\uff0c<code>auto_now=True<\/code> \u548c <code>auto_now_add=True<\/code> \u662f\u7528\u6765\u81ea\u52a8\u5904\u7406\u65e5\u671f\u65f6\u95f4\u5b57\u6bb5\u7684\u9009\u9879\uff0c\u5b83\u4eec\u6709\u4e0d\u540c\u7684\u7528\u9014\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong><code>auto_now=True<\/code><\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6bcf\u6b21\u4fdd\u5b58\u5bf9\u8c61\u65f6\uff0c\u90fd\u4f1a\u5c06\u5f53\u524d\u65e5\u671f\u548c\u65f6\u95f4\u81ea\u52a8\u4fdd\u5b58\u5230\u5b57\u6bb5\u4e2d\u3002<\/li>\n\n\n\n<li>\u4e3b\u8981\u7528\u4e8e\u9700\u8981\u8bb0\u5f55\u201c\u6700\u540e\u4e00\u6b21\u4fee\u6539\u65f6\u95f4\u201d\u7684\u5b57\u6bb5\u3002<\/li>\n\n\n\n<li><strong>\u9002\u7528\u573a\u666f<\/strong>\uff1a\u8bb0\u5f55\u5bf9\u8c61\u6700\u540e\u4e00\u6b21\u66f4\u65b0\u7684\u65f6\u95f4\u6233\uff0c\u6bd4\u5982\u65e5\u5fd7\u7684\u66f4\u65b0\u65f6\u95f4\u5b57\u6bb5\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>   updated_at = models.DateTimeField(auto_now=True)<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6548\u679c<\/strong>\uff1a\u6bcf\u6b21\u8c03\u7528 <code>.save()<\/code> \u65b9\u6cd5\uff0c\u65e0\u8bba\u662f\u5426\u6709\u5b57\u6bb5\u53d8\u5316\uff0c<code>updated_at<\/code> \u90fd\u4f1a\u66f4\u65b0\u4e3a\u5f53\u524d\u65f6\u95f4\u3002<\/p>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong><code>auto_now_add=True<\/code><\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5728\u5bf9\u8c61\u7b2c\u4e00\u6b21\u88ab\u521b\u5efa\u65f6\uff0c\u4f1a\u5c06\u5f53\u524d\u65e5\u671f\u548c\u65f6\u95f4\u81ea\u52a8\u4fdd\u5b58\u5230\u5b57\u6bb5\u4e2d\uff0c\u4ee5\u540e\u4e0d\u4f1a\u66f4\u65b0\u3002<\/li>\n\n\n\n<li>\u4e3b\u8981\u7528\u4e8e\u8bb0\u5f55\u201c\u5bf9\u8c61\u521b\u5efa\u65f6\u95f4\u201d\u7684\u5b57\u6bb5\u3002<\/li>\n\n\n\n<li><strong>\u9002\u7528\u573a\u666f<\/strong>\uff1a\u8bb0\u5f55\u5bf9\u8c61\u7684\u521b\u5efa\u65f6\u95f4\uff0c\u6bd4\u5982\u7528\u6237\u6ce8\u518c\u65f6\u95f4\u3001\u6587\u7ae0\u53d1\u8868\u65f6\u95f4\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>   created_at = models.DateTimeField(auto_now_add=True)<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6548\u679c<\/strong>\uff1a\u53ea\u5728\u5bf9\u8c61\u521d\u6b21\u4fdd\u5b58\u65f6\u8bbe\u7f6e\u65f6\u95f4\uff0c\u4ee5\u540e\u4e0d\u4f1a\u66f4\u6539\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u603b\u7ed3\u533a\u522b<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>auto_now<\/code>\uff1a\u6bcf\u6b21\u4fdd\u5b58\u90fd\u4f1a\u66f4\u65b0\u4e3a\u5f53\u524d\u65f6\u95f4\uff0c\u8868\u793a\u201c\u6700\u540e\u4fee\u6539\u65f6\u95f4\u201d\u3002<\/li>\n\n\n\n<li><code>auto_now_add<\/code>\uff1a\u53ea\u5728\u5bf9\u8c61\u521b\u5efa\u65f6\u8bbe\u7f6e\u4e00\u6b21\uff0c\u8868\u793a\u201c\u521b\u5efa\u65f6\u95f4\u201d\u3002<\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u6ce8\u610f\uff1a\u4e24\u8005\u4e0d\u80fd\u540c\u65f6\u7528\u5728\u540c\u4e00\u4e2a\u5b57\u6bb5\u4e0a\uff0c\u5426\u5219\u4f1a\u62a5\u9519\u3002<\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 Django \u7684\u6a21\u578b\u5b57\u6bb5\u4e2d\uff0cauto_now=True \u548c auto_now_add=True \u662f\u7528\u6765\u81ea\u52a8 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1154","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"http:\/\/www.chan.ink\/index.php\/wp-json\/wp\/v2\/posts\/1154","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.chan.ink\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.chan.ink\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.chan.ink\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.chan.ink\/index.php\/wp-json\/wp\/v2\/comments?post=1154"}],"version-history":[{"count":1,"href":"http:\/\/www.chan.ink\/index.php\/wp-json\/wp\/v2\/posts\/1154\/revisions"}],"predecessor-version":[{"id":1155,"href":"http:\/\/www.chan.ink\/index.php\/wp-json\/wp\/v2\/posts\/1154\/revisions\/1155"}],"wp:attachment":[{"href":"http:\/\/www.chan.ink\/index.php\/wp-json\/wp\/v2\/media?parent=1154"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.chan.ink\/index.php\/wp-json\/wp\/v2\/categories?post=1154"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.chan.ink\/index.php\/wp-json\/wp\/v2\/tags?post=1154"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}