mongoose | Embedded Web Server | Websocket library
kandi X-RAY | mongoose Summary
kandi X-RAY | mongoose Summary
Mongoose is a networking library for C/C++. It implements event-driven non-blocking APIs for TCP, UDP, HTTP, WebSocket, MQTT. It is designed for connecting devices and bringing them online. On the market since 2004, used by vast number of open source and commercial products - it even runs on the International Space Station! Mongoose makes embedded network programming fast, robust, and easy. Features include:.
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QUESTION
I have const language array. i want all languages to be used as key of my schema object. i have dumbed my language array in constant and loop through it to get the value of each language and export it, now I am importing it to my schema and using it as key variable but I am getting above error
language constant
ANSWER
Answered 2021-Jun-15 at 10:13Why it is an error : You are passing a function as key.
Instead of using your function there :
- export languages
- import them in your file and loop through them.
- add keys dynamically to the schemaObject.
Example :
QUESTION
I would like to display all my traces like in the examples from the moleculer-jaeger package:
But what i get is something like this: All spans you can see in this picture should be within the main trace (gateway).
Here is my moleculer.config:
...ANSWER
Answered 2021-Jun-14 at 21:33- This version already has a built-in jager tracer, see the documentation.
- In order for the events to be nested, it is necessary to transfer the context inside the actions, use
ctx.call
calls instead ofbroker.call
, so they will be nested. - To quickly receive support for the moleculer, join us in discord!
QUESTION
I had a problem.
When i create map in MongoDB Example Shop
...ANSWER
Answered 2021-Jun-14 at 18:31The problem is MongoDB uses BSON format for storing documents. And it does not support Map objects now. There is an open issue to to add functionality close to what you're looking for. But as for now it's not implemented.
You may write your own deserializer to restore your Map object. After getting the document from the DB you'll have to transfrom certain properties into corresponding entities. Map in your case. Something like:
QUESTION
I have a react application (Node back end) running on Heroku (free option) connecting to a MongoDB running on Atlas (also free option). When I connect the application from my local machine to the Atlas DB all is fine and data retrieved (all 108 K records) in about 10 seconds, smaller amounts (4-500 records) of data in much less time. The same request from the application running on Heroku to the Atlas DB fails. The application running on Heroku can retrieve a small number of records (1-10) from the same collection of (108 K records), in less than a second. As soon as I try to retrieve a couple of hundred records the system fails. Below are the logs. I included the section of the logs that show a successful retrieval of 1 record and then failing on the request for about 450 records.
I have three questions:
- What is the cause of the issue?
- Is there a work around in the free option of Heroku?
- If there is no work around in the free option, what Heroku pay level will I need to get to and what steps will I need to take to get this working? I will probably upgrade in the future but want to prove all is working before going in that direction.
Logs:
...ANSWER
Answered 2021-Jun-14 at 18:09You're running out of heap memory in your node server. It might be because there's some statement that uses a lot of memory. You can try to find that or you can try to increase node memory like this.
QUESTION
i want to increment a variable located in a subobjcetc of a mongodb database.
This is my code:
...ANSWER
Answered 2021-Jun-14 at 17:52You can create a new object and put that in MongoDB query, For example:
QUESTION
I'm learning nestjs with mongodb (mongoose) and I'm trying to get a single user from the database.
users.service.ts ...ANSWER
Answered 2021-Jun-14 at 17:11Your @Get(':username')
route handler defines that it should have a username
parameter passed to it, but doesn't tell Nest how to pass it. You can do one of two things here:
use
@Param('username')
to pull the username directly fromreq.params['username']
. Quick and easyuse
@Param() { username }
to deconstructreq.params
to pull out justusername
(it should be the only value anyways). The benefit of this approach is being able to use theValidationPipe
with a DTO class to represent thereq.params
object. With the second approach, your@Get(':username')
method would look like this:
QUESTION
I am getting Request Failed error when I am tying to logging in through frontend:
But, I am able to, when I am entering emailID and password through thunder client:
I am entering correct ID and password here is my request:
but what I am getting in return is:
Here is my source code:
FRONTENDuserAction.js
...ANSWER
Answered 2021-Jun-14 at 13:28Did you ensure, back-end side, you were receiving the email and password properly before even trying to match passwords?
I think the problem lies here:
QUESTION
how can i send a file/image in reactjs uploaded through an to the backend, using axios? the simple input form is this :
...ANSWER
Answered 2021-Jun-14 at 13:28Since Postman worked, your backend is setup properly. Now on to your frontend.
Axios handles multipart form data if your data is an instance of FormData.
- In your component you can set a state variable to hold the selected file
QUESTION
This is my problem : I have a document ( let's call it root) containing an array of another documents (stick), that contain another array of another documents (leaf).
Or simply said : root{ stickChain[leaveschain1[ leaf1, leaf2],leaveschain2[ leaf1, leaf2] ]}
I have access to root _id, stick _id, or whatever it is needed to identify each document.
Basically, the best result I've come so far is, when creating my leaves documents, is to store then at the same level tha sticks, or in another word I've come to create an array of leaves in root.
I'm working in javascript and using mongoose
This is the line I've used:
...ANSWER
Answered 2021-Jun-14 at 09:31I've splitted my dument like this :
- root[stickChain _id]
- stick[leavesChain[leaf]]
Thanks to Andrey Popov for his explications
QUESTION
I have interest in one problem like this:
Initially we have document in database. for example:
ANSWER
Answered 2021-Jun-13 at 20:27Make a simple query and do the rest of the operations in JS.
- You will have to query the entire collection sorted by your 'name' field.
- You will have to get your specific range.
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