我目前在为下面的文档创建架构时遇到问题。来自服务器的响应始终将“trk”字段值返回为[Object]。不知何故,我不知道这应该如何运作,因为我至少尝试过对我有意义的所有方法; - )
如果这有帮助,我的Mongoose版本是3.6.20和MongoDB 2.4.7 在我忘记之前,将其设置为Index(2d)
会更好原始数据:
{
"_id": ObjectId("51ec4ac3eb7f7c701b000000"),
"gpx": {
"metadata": {
"desc": "Nürburgring VLN-Variante",
"country": "de",
"isActive": true
},
"trk": [
{
"lat": 50.3299594,
"lng": 6.9393006
},
{
"lat": 50.3295046,
"lng": 6.9390688
},
{
"lat": 50.3293714,
"lng": 6.9389939
},
{
"lat": 50.3293284,
"lng": 6.9389634
}]
}
}
Mongoose Schema:
var TrackSchema = Schema({
_id: Schema.ObjectId,
gpx: {
metadata: {
desc: String,
country: String,
isActive: Boolean
},
trk: [{lat:Number, lng:Number}]
}
}, { collection: "tracks" });
Chrome中“网络”标签的响应总是如此(这只是错误的trk部分):
{ trk:
[ [Object],
[Object],
[Object],
[Object],
[Object],
[Object],
我已经为“trk”尝试了不同的模式定义:
希望你能帮助我; - )
答案 0 :(得分:186)
您可以通过以下方式申报trk: -
trk : [{
lat : String,
lng : String
}]
或
trk : { type : Array , "default" : [] }
在插入过程中的第二种情况下,将对象推入数组,如
db.update({'Searching criteria goes here'},
{
$push : {
trk : {
"lat": 50.3293714,
"lng": 6.9389939
} //inserted data is the object to be inserted
}
});
或者您可以通过
设置对象数组db.update ({'seraching criteria goes here ' },
{
$set : {
trk : [ {
"lat": 50.3293714,
"lng": 6.9389939
},
{
"lat": 50.3293284,
"lng": 6.9389634
}
]//'inserted Array containing the list of object'
}
});
答案 1 :(得分:58)
我和mongoose有类似的问题:
fields:
[ '[object Object]',
'[object Object]',
'[object Object]',
'[object Object]' ] }
事实上,我在我的架构中使用“type”作为属性名称:
fields: [
{
name: String,
type: {
type: String
},
registrationEnabled: Boolean,
checkinEnabled: Boolean
}
]
要避免这种行为,您必须将参数更改为:
fields: [
{
name: String,
type: {
type: { type: String }
},
registrationEnabled: Boolean,
checkinEnabled: Boolean
}
]
答案 2 :(得分:1)
感谢您的回复。
我尝试了第一种方法,但没有改变。然后,我尝试记录结果。我只是逐级钻取,直到我终于到达显示数据的位置。
过了一会儿我发现了问题:当我发送回复时,我通过.toString()
将其转换为字符串。
我修复了它,现在它的工作非常出色。抱歉误报。
答案 3 :(得分:0)
我需要解决的问题是存储包含一些字段的合同(地址,账簿,num_of_days,借款人地址,blk_data),blk_data是事务列表(块编号和事务地址)。 这个问题和答案帮助了我。我想分享我的代码如下。希望这会有所帮助。
- 架构定义。请参阅blk_data。
var ContractSchema = new Schema(
{
address: {type: String, required: true, max: 100}, //contract address
// book_id: {type: String, required: true, max: 100}, //book id in the book collection
book: { type: Schema.ObjectId, ref: 'clc_books', required: true }, // Reference to the associated book.
num_of_days: {type: Number, required: true, min: 1},
borrower_addr: {type: String, required: true, max: 100},
// status: {type: String, enum: ['available', 'Created', 'Locked', 'Inactive'], default:'Created'},
blk_data: [{
tx_addr: {type: String, max: 100}, // to do: change to a list
block_number: {type: String, max: 100}, // to do: change to a list
}]
}
);
- 在MongoDB中为集合创建一条记录。请参阅blk_data。
// Post submit a smart contract proposal to borrowing a specific book.
exports.ctr_contract_propose_post = [
// Validate fields
body('book_id', 'book_id must not be empty.').isLength({ min: 1 }).trim(),
body('req_addr', 'req_addr must not be empty.').isLength({ min: 1 }).trim(),
body('new_contract_addr', 'contract_addr must not be empty.').isLength({ min: 1 }).trim(),
body('tx_addr', 'tx_addr must not be empty.').isLength({ min: 1 }).trim(),
body('block_number', 'block_number must not be empty.').isLength({ min: 1 }).trim(),
body('num_of_days', 'num_of_days must not be empty.').isLength({ min: 1 }).trim(),
// Sanitize fields.
sanitizeBody('*').escape(),
// Process request after validation and sanitization.
(req, res, next) => {
// Extract the validation errors from a request.
const errors = validationResult(req);
if (!errors.isEmpty()) {
// There are errors. Render form again with sanitized values/error messages.
res.status(400).send({ errors: errors.array() });
return;
}
// Create a Book object with escaped/trimmed data and old id.
var book_fields =
{
_id: req.body.book_id, // This is required, or a new ID will be assigned!
cur_contract: req.body.new_contract_addr,
status: 'await_approval'
};
async.parallel({
//call the function get book model
books: function(callback) {
Book.findByIdAndUpdate(req.body.book_id, book_fields, {}).exec(callback);
},
}, function(error, results) {
if (error) {
res.status(400).send({ errors: errors.array() });
return;
}
if (results.books.isNew) {
// res.render('pg_error', {
// title: 'Proposing a smart contract to borrow the book',
// c: errors.array()
// });
res.status(400).send({ errors: errors.array() });
return;
}
var contract = new Contract(
{
address: req.body.new_contract_addr,
book: req.body.book_id,
num_of_days: req.body.num_of_days,
borrower_addr: req.body.req_addr
});
var blk_data = {
tx_addr: req.body.tx_addr,
block_number: req.body.block_number
};
contract.blk_data.push(blk_data);
// Data from form is valid. Save book.
contract.save(function (err) {
if (err) { return next(err); }
// Successful - redirect to new book record.
resObj = {
"res": contract.url
};
res.status(200).send(JSON.stringify(resObj));
// res.redirect();
});
});
},
];
- 更新记录。请参阅blk_data。
// Post lender accept borrow proposal.
exports.ctr_contract_propose_accept_post = [
// Validate fields
body('book_id', 'book_id must not be empty.').isLength({ min: 1 }).trim(),
body('contract_id', 'book_id must not be empty.').isLength({ min: 1 }).trim(),
body('tx_addr', 'tx_addr must not be empty.').isLength({ min: 1 }).trim(),
body('block_number', 'block_number must not be empty.').isLength({ min: 1 }).trim(),
// Sanitize fields.
sanitizeBody('*').escape(),
// Process request after validation and sanitization.
(req, res, next) => {
// Extract the validation errors from a request.
const errors = validationResult(req);
if (!errors.isEmpty()) {
// There are errors. Render form again with sanitized values/error messages.
res.status(400).send({ errors: errors.array() });
return;
}
// Create a Book object with escaped/trimmed data
var book_fields =
{
_id: req.body.book_id, // This is required, or a new ID will be assigned!
status: 'on_loan'
};
// Create a contract object with escaped/trimmed data
var contract_fields = {
$push: {
blk_data: {
tx_addr: req.body.tx_addr,
block_number: req.body.block_number
}
}
};
async.parallel({
//call the function get book model
book: function(callback) {
Book.findByIdAndUpdate(req.body.book_id, book_fields, {}).exec(callback);
},
contract: function(callback) {
Contract.findByIdAndUpdate(req.body.contract_id, contract_fields, {}).exec(callback);
},
}, function(error, results) {
if (error) {
res.status(400).send({ errors: errors.array() });
return;
}
if ((results.book.isNew) || (results.contract.isNew)) {
res.status(400).send({ errors: errors.array() });
return;
}
var resObj = {
"res": results.contract.url
};
res.status(200).send(JSON.stringify(resObj));
});
},
];
答案 4 :(得分:0)
为了在模式中创建数组,我们必须将另一个模式创建为 monetizationSchema
,用于一次存储一个数据,另一个模式为 blogSchema
,我们有 monetization
字段包含 { {1}} 在方括号中作为数组。
monetizationSchema
用于一次存储一个数据。
Schema
以 const monetizationSchema = new Schema({
amazonUrl: {
type: String,
required: true,
}
});
作为数组的架构。
monetization