Question

我来自Oracle PLSQL背景，我才刚刚开始学习MongoDB命令。

for i in df.loc[np.isnan(df['s_number'])].index:
    df['s_number'] = -sum(df[:i])
df['cumsum'] = df['s_number'].cumsum()

    index  s_number  s_cumsum
0       0       1.0         1
1       1       4.0         5
2       2       6.0        11
3       3     -11.0         0
4       4       7.0         7
5       5       2.0         9
6       6       3.0        12
7       0       1.0        13
8       1       4.0        17
9       2       6.0        23
10      3     -23.0         0
11      4       7.0         7
12      5       2.0         9
13      6       3.0        12

我需要查询以下文件：

   >db.Employee.find()
   { "_id" : 10, "EmployeeName" : "Smith" }
   { "_id" : 20, "EmployeeName" : "Nandhi" }
   { "_id" : 30, "EmployeeName" : "Rajan" }
   { "_id" : 50, "EmployeeName" : "Raju" }

我写了如下对应的代码：

  WHERE EmployeeName = "Smith" OR (EmployeeName = "Rajan" AND _id = 30);

错误消息

2019-03-13T22：48：26.123 + 0530 E查询[js]语法错误：无效属性ID @（shell）：1：47

Answer 1

您的$or术语必须位于单独的对象中：

db.Employee.find({$or:[{"EmployeeName":"Smith"}, {"EmployeeName":"Rajan", "_id":30}]})

Answer 2

括号被错误地括起来。像这样使用

  db.Employee.find({$or:[{"EmployeeName":"Smith"},{"EmployeeName":"Rajan","_id":30}]})

SyntaxError：无效的属性ID-MongoDB

2 个答案: