I have this GraphQL query:
{
timeline(limit:10){
eventType
level: eventSeverity
},
}
I would like to set the 'eventSeverity' alias name using a variable, rather than the fixed name 'level'. Something like this:
query($name:String!)
{
timeline(limit:10){
eventType
$name: eventSeverity
},
}
But running the above yields this error:
Syntax Error GraphQL request (5:5) Expected Name, found $
Is it possible to use a variable value as an alias name at all?
You cannot use dynamic field name in GraphQL, but what you can do is create a field that accepts a name argument, example
query($name: String!) {
timeline(limit: 10) {
eventType
eventSeverity(name: $name) // Write a resolve function that returns timeline[name]
}
}
Related
I'm using mikro-orm for db related opeartions. My db entity has a number field:
#Property({ defaultRaw: 'srNumber', type: 'number' })
srNumber!: number;
and corresponding db column (Postgresql) is:
srNumber(int8)
The query input for where param in mikro-orm EntityRepository's findAndCount(where, option) is:
repository.findAndCount({"srNumber":{"$like":"%1000%"}}, options)
It translates to:
select * from table1 where srNumber like '%1000%'
The problem here is since srNumber column is not a string, there is a type-mismatch and query fails. Casting it like CAST(srNumber AS TEXT) like '%1000%' should work in db.
Is there any way to somehow specify the field casting here?
You can use custom SQL fragments in the query. To get around strictly typed FilterQuery, you can use expr which is just an identity function (returns its parameter), so have effect only for TS checks.
Something like this should work:
import { expr } from '#mikro-orm/core';
const res = await repo.findAndCount({
[expr('cast(srNumber as text)')]: { $like: '%1000%' },
}, options);
https://mikro-orm.io/docs/entity-manager/#using-custom-sql-fragments
I have a json with several keys being a number instead of a fixed string. Is there any way I could bypass them in order to access the nested values?
{
"55568509":{
"registers":{
"001":{
"isPlausible":false,
"deviceNumber":"55501223",
"register":"001",
"readingValue":"5295",
"readingDate":"2021-02-25T00:00:00.000Z"
}
}
}
}
My expected output here would be 5295, but since 59668509 can vary from json to json, JSON_QUERY(data, '$."59668509".registers."001".readingValue) would not be an option. I'm not able to use regexp here because this is only a part of the original json, which contains more than this.
UPDATE: full json with multiple occurrences:
This is how my whole json looks like. I would like all the readingValue in brackets, in the example below, my expected output would be [32641, 00964].
WITH test_table ( data ) AS (
SELECT
'{
"session":{
"sessionStartDate":"2021-02-26T12:03:34+0000",
"interactionDate":"2021-02-26T12:04:19+0000",
"sapGuid":"369F01DFXXXXXXXXXX8553F40CE282B3",
"agentId":"USER001",
"channel":"XXX",
"bpNumber":"5551231234",
"contractAccountNumber":"55512312345",
"contactDirection":"",
"contactMethod":"Z08",
"interactionId":"5550848784",
"isResponsibleForPayingBill":"Yes"
},
"payload":{
"agentId":"USER001",
"contractAccountNumber":"55512312345",
"error":{
"55549271":{
"registers":{
"001":{
"isPlausible":false,
"deviceNumber":"55501223",
"register":"001",
"readingValue":"32641",
"readingDate":"2021-02-26T00:00:00.000Z"
}
},
"errors":[
{
"contractNumber":"55501231",
"language":"EN",
"errorCode":"62",
"errorText":"Error Text1",
"isHardError":false
},
{
"contractNumber":"55501232",
"language":"EN",
"errorCode":"62",
"errorText":"Error Text2",
"isHardError":false
}
],
"bpNumber":"5557273667"
},
"55583693":{
"registers":{
"001":{
"isPlausible":false,
"deviceNumber":"555121212",
"register":"001",
"readingValue":"00964",
"readingDate":"2021-02-26T00:00:00.000Z"
}
},
"errors":[
],
"bpNumber":"555123123"
}
}
}
}'
FROM
dual
)
SELECT
JSON_QUERY(data, '$.payload.error.*.registers.*[*].readingValue') AS reading_value
FROM
test_table;
UPDATE 2:
Solved, this would do the trick, upvoting the first comment.
JSON_QUERY(data, '$.payload.error.*.registers.*.readingValue' WITH WRAPPER) AS read_value
As I explained in the comment to your question, if you are getting that result from the JSON you posted, you are not using JSON_QUERY(); you must be using JSON_VALUE(). Either that, or there's something else you didn't share with us.
In any case, let's say you are using JSON_VALUE() with the arguments you showed. You are asking, how can you modify the path so that the top-level attribute name is not hard-coded. That is trivial: use asterisk (*) instead of the hard-coded name. (This would work the same with JSON_QUERY() - it's about JSON paths, not the specific function that uses them.)
with test_table (data) as (
select
'{
"59668509":{
"registers":{
"001":{
"isPlausible":false,
"deviceNumber":"40157471",
"register":"001",
"readingValue":"5295",
"readingDate":"2021-02-25T00:00:00.000Z"
}
}
}
}' from dual
)
select json_value (data, '$.*."registers"."001"."readingValue"'
returning number) as reading_value
from test_table
;
READING_VALUE
-------------
5295
As an aside that is not related to your question in any way: In your JSON you have an object with a single attribute named "registers", whose value is another object with a single attribute "001", and in turn, this object has an attribute named "register" with value "001". Does that make sense to you? It doesn't to me.
var mongoose = require("mongoose");
// schema setup
var productSchema = new mongoose.Schema({
type:{
type:String,
required:[true,'a product must have a type']
},
sId:String,
image:String,
products:[{
name:String,
image:String,
price:Number
}]
});
module.exports = mongoose.model("Product",productSchema);
I have made my mongoose schema like this. Now I just want to access a particular object from the array of objects named 'products' using a mongoose query.
Can anyone please tell me how can i do this?? I'll be soo grateful.
You need something like this:
db.collection.find({
"products.name": "name"
},
{
"products.$": 1
})
With this query you will find the product object whose name field is 'name'. Afther that, with the positional operator $ only the matching is returning.
Mongo playground example here
Edit: Note that this query will return multiple subdocuments if exists multiple documents with the array object matching. To filter for a unique element you have to indicate another unique field like this:
db.collection.find({
"sId": "1",
"products.name": "name"
},
{
"products.$": 1
})
Edit to explain how to use find using mongoose.
You can use find or findOne, but the query itself will be the same.
This is pretty simple. You need to use your model described in the question, so the code is somthing like this:
var objectFound = await YourModel.findOne({
"products.name": "name"
},
{
"products.$": 1
})
Where YourModel is the schema defined.
I started using vue.js and i would like to know if there is any best way (clean) to declare my data variables:
for example i have :
profileInfos: {
name:null,
email: null,
mobile: null
},
when i do :
profileInfos: {name, email, mobile},
i get an error message : email not defined
can i declare profileInfos without the keys name, email, mobile and use v-text in my html tags ?
You can simply do:
declare
profileInfos: {}
then you can straightforwardly set undeclared property up to 1 level of the object like:
this.profileInfos.name = 'my Name'
So, I have an Express server running Sequelize ORM. Client will answer some questions with radio button options, and the answers is passed as query parameters to the URL, so I can make a GET request to server.
The thing is: my req.query values are supposed to be the column names for my database table. I want to know if it's possible to get the response from the database using Sequelize, and passing the parameters as the column name of the table.
async indexAbrigo(req, res) {
try {
let abrigos = null
let type = req.query.type // type = 'periodoTEMPORARIO'
let reason = req.query.reason // reason = 'motivoRUA'
abrigos = await Abrigos.findAll({
attributes: ['idABRIGOS'],
where: {
//I want type and reason to be the parameters that I got from client
type: 'S',
reason: 'S'
}
})
}
res.send(abrigos)
}
This is not working, the result of the query is something like
(SELECT `idABRIGOS` FROM Abrigos WHERE `type` = `S` AND `reason` = `S`)
Instead, I need that type and reason get translated to their values, and these values will be passed to the SQL. Is it possible to do with Sequelize? Or is it even possible with any ORM for Node/Express?
Thanks.
Yes, you can do it with computed property names. It would look like this:
where: {
[type]: 'S',
[reason]: 'S'
}
Your node.js version must be compatible with ES6.
Thank you - I am passing parameters right from req.body and this worked perfectly for me so I am posting it in the event that it may save someone time.
app.post('/doFind', (req, res) => {
Abrigos.findAll(
{[req.body.field]: req.body.newVal},
{returning: true, where: {id: req.body.id}}
)
.then( () => {
res.status(200).end()
})
.catch(err => {
console.log("Err: " + err)
res.status(404).send('Error attempting to update database').end()
})
})