{"id":641,"date":"2018-12-26T16:53:17","date_gmt":"2018-12-26T08:53:17","guid":{"rendered":"https:\/\/wyxxt.org.cn\/?p=641"},"modified":"2023-12-04T17:05:13","modified_gmt":"2023-12-04T09:05:13","slug":"mongodb%e4%bf%ae%e6%94%b9%e5%ad%97%e6%ae%b5%e7%b1%bb%e5%9e%8b","status":"publish","type":"post","link":"https:\/\/wyxxt.org.cn\/?p=641","title":{"rendered":"mongodb\u4fee\u6539\u5b57\u6bb5\u7c7b\u578b"},"content":{"rendered":"<h2>mongo \u53ef\u4ee5\u901a\u8fc7ind(&#8230;).forEach(function(x) {})\u8bed\u6cd5\u6765\u4fee\u6539collection\u7684field\u7684\u7c7b\u578b\u3002<\/h2>\n<p><strong>\u5047\u8bbecollection\u4e3afoo,field\u4e3abad:<\/strong><\/p>\n<h3>string \u8f6c int<\/h3>\n<pre><code class=\"language-shell line-numbers\">db.foo.find({bad: {$exists: true}}).forEach(function(obj) {\n    obj.bad = new NumberInt(obj.bad);\n    db.foo.save(obj);\n});\n<\/code><\/pre>\n<h3>int \u8f6c string<\/h3>\n<pre><code class=\"language-shell line-numbers\">db.foo.find(bad: {$exists: true}).forEach(function(obj) {\n    obj.bad = obj.bad + \"\";\n    db.foo.save(obj);\n});\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>mongo \u53ef\u4ee5\u901a\u8fc7ind(&#8230;).forEach(function(x) {})\u8bed\u6cd5\u6765\u4fee\u6539coll 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