{"id":217,"date":"2021-01-02T13:23:52","date_gmt":"2021-01-02T07:23:52","guid":{"rendered":"http:\/\/www.jichangqing.net\/wordpress\/?p=217"},"modified":"2021-01-02T15:09:21","modified_gmt":"2021-01-02T09:09:21","slug":"typeerror-__init__-missing-1-required-positional-argument-on_delete-%e7%9a%84%e8%a7%a3%e5%86%b3","status":"publish","type":"post","link":"http:\/\/www.jichangqing.net\/wordpress\/?p=217","title":{"rendered":"TypeError: __init__() missing 1 required positional argument: &#8216;on_delete&#8217;  \u7684\u89e3\u51b3."},"content":{"rendered":"<p>django by exapmple, \u7b2c12\u9875 \u7b2c14\u884c,<\/p>\n<pre>author <span style=\"color: #a71d5d;\">= <\/span>models<span style=\"color: #63a35c;\">.<\/span><span style=\"color: #0086b3;\">ForeignKey<\/span><span style=\"color: #63a35c;\">(<\/span>User<span style=\"color: #63a35c;\">, <\/span><span style=\"color: #660099;\">related_name<\/span><span style=\"color: #a71d5d;\">=<\/span><span style=\"font-weight: bold; color: #008080;\">'blog_posts'<\/span><span style=\"color: #63a35c;\">)<\/span><\/pre>\n<p>\u6267\u884c\u00a0py manage.py makemigrations blog \u63d0\u793a: author = models.ForeignKey(User, related_name=&#8217;blog_posts&#8217;) TypeError: __init__() missing 1 required positional argument: &#8216;on_delete&#8217; \u8fd9\u4e2a\u9519\u8bef\u4ee5\u524d\u89c1\u8fc7, \u52a0\u4e0a\u00a0<span style=\"color: #660099;\">on_delete<\/span><span style=\"color: #a71d5d;\">=<\/span>models<span style=\"color: #63a35c;\">.<\/span>CASCADE \u5c31\u53ef\u4ee5\u4e86<\/p>\n<pre>author <span style=\"color: #a71d5d;\">= <\/span>models<span style=\"color: #63a35c;\">.<\/span><span style=\"color: #0086b3;\">ForeignKey<\/span><span style=\"color: #63a35c;\">(<\/span>User<span style=\"color: #63a35c;\">, <\/span><span style=\"color: #660099;\">on_delete<\/span><span style=\"color: #a71d5d;\">=<\/span>models<span style=\"color: #63a35c;\">.<\/span>CASCADE<span style=\"color: #63a35c;\">, <\/span><span style=\"color: #660099;\">related_name<\/span><span style=\"color: #a71d5d;\">=<\/span><span style=\"font-weight: bold; color: #008080;\">'blog_posts'<\/span><span style=\"color: #63a35c;\">)\r\n<\/span><\/pre>\n<p>\u6210\u529f:<\/p>\n<p>Migrations for &#8216;blog&#8217;:<br \/>\nblog\\migrations\\0001_initial.py<br \/>\n&#8211; Create model Post<\/p>\n<p><span style=\"color: #4d4d4d;\">\u89e3\u91ca, \u9700\u8981\u5728Foreign\u7684\u7b2c\u4e8c\u53c2\u6570\u4e2d\u52a0\u5165on_delete=models.CASCADE\u00a0 \u4e3b\u5916\u5173\u7cfb\u952e\u4e2d\uff0c\u7ea7\u8054\u5220\u9664\uff0c\u4e5f\u5c31\u662f\u5f53\u5220\u9664\u4e3b\u8868\u7684\u6570\u636e\u65f6\u5019\u4ece\u8868\u4e2d\u7684\u6570\u636e\u4e5f\u968f\u7740\u4e00\u8d77\u5220\u9664,\u4ee5\u4fdd\u8bc1\u4e00\u81f4\u6027.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>django by exapmple, \u7b2c12\u9875 \u7b2c14\u884c, author = models.ForeignKey(User, related_name=&#8217;blog_posts&#8217;) \u6267\u884c\u00a0py manage.py makemigration &#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-217","post","type-post","status-publish","format-standard","hentry","category-django"],"_links":{"self":[{"href":"http:\/\/www.jichangqing.net\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/217","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.jichangqing.net\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.jichangqing.net\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.jichangqing.net\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.jichangqing.net\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=217"}],"version-history":[{"count":1,"href":"http:\/\/www.jichangqing.net\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/217\/revisions"}],"predecessor-version":[{"id":218,"href":"http:\/\/www.jichangqing.net\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/217\/revisions\/218"}],"wp:attachment":[{"href":"http:\/\/www.jichangqing.net\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=217"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.jichangqing.net\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=217"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.jichangqing.net\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=217"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}