How to get array object values by nodejs api call

Question

Trying to get value from nodejs api call but i am getting like [object Object] So How to get values from an array object?

product.component.ts:

 this.sendDatatoInsertDb(this.selectedProduct.replace(/\s/g,''),JSON.stringify(this.registerForm.value));

 sendDatatoInsertDb(collection,collectionData) { 
    this.adminService.insertDataintoDb(collection,collectionData).subscribe(
      res => {  },
      err => {  console.log(err); }
    ); 
  }

this.registerForm.value is like

{
        "p_id": "C5",
        "product_name": "name",
        "product_weight": "250gm"

}

admin.service.ts:

 insertDataintoDb(collection,insertData){
    return this.http.get(environment.apiBaseUrl + '/insertData?collection='+collection+'&collectionData='+insertData);
  }

product.controller.js:

module.exports.insertData = (req, res, next) => { 
    let collectionName = req.query.collection; 
    let collectionData = req.query.collectionData;
        console.log(collectionData); //Getting [object Object]
        console.log(collectionData.p_id); //Getting undefined
        console.log(collectionData.product_name); //Getting undefined
        console.log(collectionData.product_weight);  //Getting undefined
}

@SaadSohail : Getting error : TypeError: JSON.stringfy is not a function — Kavitha K
– Kavitha K, Commented May 16, 2020 at 9:58
let response = JSON.stringfy(collectionData) object is the response that you are getting from api — Engineer S. Saad
– Engineer S. Saad, Commented May 16, 2020 at 10:00

Nsoseka · Accepted Answer · 2020-05-16 15:59:13Z

1

You have to parse the string to get your object back using JSON.parse.

module.exports.insertData = (req, res, next) => { 
    let collectionName = req.query.collection; 
    let collectionData = req.query.collectionData;
    let collectionDataJSON = JSON.parse(collectionData);
    console.log(collectionDataJSON.p_id);

}

edited May 16, 2020 at 15:59

answered May 16, 2020 at 9:59

Nsoseka

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21 Comments

Kavitha K Over a year ago

Getting error :TypeError: collectionData.each is not a function

Nsoseka Over a year ago

I update the code to forEach. Forgot that each is not a javascript method. My bad lol @KavithaK

Kavitha K Over a year ago

Getting error: TypeError: collectionData.forEach is not a function

Nsoseka Over a year ago

I am suspecting that your array is return as a string. You might have to parse it first. Replace let collectionData = req.query.collectionData; with let collectionData = JSON.parse(req.query.collectionData);. To really help you i will need to know the type of collectionData but i think this will help

Kavitha K Over a year ago

Getting error: SyntaxError: Unexpected token o in JSON at position 1

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