Java script how to construct an object using variables

I'm working on express.js framework and sequlize.js orm.

I get the region and the type from the back-end.

Using those two variables I want to construct an object to pass to the sequlize orm.

let region_id = req.swagger.params.region_id.value;
let type = req.swagger.params.type.value;

console.log("REGION", region_id) // will output 4,5,6,... etc
console.log("TYPE", type) // will output is_lunch,is_dinner,... etc

That was my variables.

This is my object

const prepared_query =
where:
,
attributes: ['price'],
include: [
model: db.restaurants,
attributes: ['region_id'],
where:
region_id: ''

]


prepared_query.include[0].where.region_id = region_id;
prepared_query.where[type] = true;

prepared_query.include[0].where.region_id = region_id;


successfully replaced the region_id as 4. but

prepared_query.where[type] = true;


is not gives me is_lunch:true' instead it gives me Cannot set property 'is_lunch' of undefined

is_lunch:true'

Cannot set property 'is_lunch' of undefined

HOW DO I ACHIEVE THIS USING JAVA SCRIPT?

prepared_query[type] = true;

2 Answers
2

you can do this.

prepared_query.include[0].where.region_id = region_id;
prepared_query[type] = true;

object.property = value;

//static
"property": value;

object[property] = value;

//dynamic
[property]: value;



read this page: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Property_Accessors

await - async

I didn't set anything to the prepared_query.where was the problem here.

prepared_query.where

prepared_query.where = ;
prepared_query.where[type] = true


Gives me the correct output.

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