我有一个问题。 我想用像常规关系 Db 一样的方法, 在我的节点 JS 文件中查询我的MongoDB。 问题是我想要的东西不是字面上的... 这是一个变量! 我还没有找到这样做的好办法。 我拍到的“ 第一次尝试” 镜头是:
var result = postData.replace(/+/g, ).substring(5);
db.testlogwiki.find({"line_text" : /result/ };
//predictably only matches to the literal "result" as opposed to my variable
rologwiki 是用 mongo 制成的... 我用它运行着, 它用“ 线性_ text” 输入 mach 到 db 条目, 包含“ 结果” 字面上 。
这似乎是一个非常简单的问题...
试试这个:
db.testlogwiki.find({"line_text" : new RegExp(result) };
两者都将有效
db.testlogwiki.find({"line_text" : new RegExp(result, i ) }; // to make this case insensitive
或
db.testlogwiki.find( { line_text: { $regex: result[, $options: i ] } } );
其它所有解答都可能失败, 取决于您输入变量 。
您可以像其他人表示的那样使用 RegExplus, 但是您必须避开特殊的 Regex 字符, 否则这可能会失败 。
Lodash有这样做的功能(如果你没有使用它,你也许应该使用它,它会增加许多糖,但即使在ES6+标准中都没有)
db.COLLECTION.find({FIELD_NAME: new RegExp(_.escapeRegExp(VAR), i ) };
您也可以使用 $regex 选项。
db.testlogwiki.find( { line_text: { $regex: result[, $options: i ] } } );
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