node.js MongoError: '$push' 中以美元 ($) 为前缀的字段 '$push' 对存储无效
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MongoError: The dollar ($) prefixed field '$push' in '$push' is not valid for storage
提问by getglad
I am trying to upserta dataset to a Mongo collection.
我正在尝试将upsert数据集转换为 Mongo 集合。
- The intended document may or may not exist.
- If it does exist, it will have at least one item in an embedded document (zips), and should append to that document rather than overwrite it.
- If it does not exist, it should insert the new document to the collection.
- 预期的文件可能存在也可能不存在。
- 如果它确实存在，它将在嵌入的文档 (zip) 中至少包含一项，并且应该附加到该文档而不是覆盖它。
- 如果它不存在，它应该将新文档插入到集合中。
When I run the below code, I am getting an error: MongoError: The dollar ($) prefixed field '$push' in '$push' is not valid for storage.
当我运行以下代码时，出现错误： MongoError: The dollar ($) prefixed field '$push' in '$push' is not valid for storage.
I put this together based on the docs: https://docs.mongodb.org/getting-started/node/update/#update-multiple-documents
我根据文档将其放在一起：https: //docs.mongodb.org/getting-started/node/update/#update-multiple-documents
Versions: MongoDB (windows) = 3.2.0; mongodb (npm package) = 2.1.4
版本：MongoDB（Windows）= 3.2.0；mongodb（npm 包）= 2.1.4
var query = {
county: aCountyName,
state: aStateName
}
var params = {
'$set': {
county: 'Boone',
state: 'MO',
'$push': {
zips: {
'$each': [ '65203' ]
}
}
}
}
(could also be)
var params = {
'$set': {
county: 'Pierce',
state: 'WA',
'$push': {
zips: {
'$each': [ '98499', '98499' ]
}
}
}
}
db.collection(collectionName).updateMany(query, params, {'upsert': true},
function(err, results) {
callback();
}
);
回答by Owain Williams
I don't think $pushis valid within a $set. Instead try adding it as another parameter, e.g.:
我认为$push在$set. 而是尝试将其添加为另一个参数，例如：
var params = {
'$set': {
county: 'Pierce',
state: 'WA'
},
'$push': {
zips: {
'$each': ['98499',
'98499']
}
}
}
回答by styvane
The reason is because you didn't close the }so MongoDB think $pushis a field's name and as mentioned in the documentation:
原因是因为你没有关闭}所以 MongoDB 认为$push是一个字段的名称和文档中提到的：
Field names cannot contain dots (i.e. .) or null characters, and they must not start with a dollar sign (i.e. $).
字段名称不能包含点（即 .）或空字符，并且它们不能以美元符号（即 $）开头。
var query = {
county: aCountyName,
state: aStateName
};
var params = {};
params['$set'] = { county: 'Boone', state: 'MO' };
params['$push'] = { zips: { '$each': [ '65203' ] } };
Then:
然后：
db.collection(collectionName).updateMany(query, params, {'upsert': true},
function(err, results) {
callback();
}
);
