Big Json parsing in cypress, jsonPath usage

Question

I'm new to cypress and I face a problem when trying to work with json responses. I am getting json with units structure(tree structure) and I need to get all the names from it.

I tried to use jsonpath dependenc and parse json using jp.query, but it doesn't works:

 cy.request(*some request*).its('body').then((body) => {
                let units = jp.query(body, "$..[?(@.type=='PROJECT')].name");
           })

I'm getting obj needs to be an object Assertion error here

How to fix this or maybe there are any other ways to parse json in cypress?

JSON Sample:

[
{
    "id": 2,
    "name": "Solar",
    "children": [
        {
            "id": 3,
            "name": "Earth",
            "children": [
                {
                    "id": 4,
                    "name": "Moon",
                    "type": "STREAM",
                    "active": true
                }
            ],
            "type": "PROJECT",
            "active": true
        },
        {
            "id": 5,
            "name": "Jupiter",
            "children": [
                {
                    "id": 6,
                    "name": "Io",
                    "type": "STREAM",
                    "active": true
                },
                {
                    "id": 7,
                    "name": "Ganymede",
                    "type": "STREAM",
                    "active": true
                }
            ]},
    ],
    "type": "PROGRAM",
    "active": true
},
{
    "id": 9,
    "name": "Centaurus",
    "children": [
        {
            "id": 10,
            "name": "Alpha Centauri A",
            "children": [
                {
                    "id": 818,
                    "name": "Alpha Centauri Aa-2345",
                    "type": "STREAM",
                    "active": true
                }
            ],
            "type": "PROJECT",
            "active": true
        },
        {
            "id": 11,
            "name": "Alpha Centauri B",
            "children": [
                {
                    "id": 12,
                    "name": "Alpha Centauri Bb",
                    "type": "STREAM",
                    "active": true
                }
            ],
            "type": "PROJECT",
            "active": true
        },
    ],
    "type": "PROGRAM",
    "active": true
}

]

Answer 1

add below 2 lines before jp.query()

body = JSON.stringify(body);
body = JSON.parse(body);

Answer 2

Depending on how the request/response is configured, you may have one of the following issues

• response is a string
• body is a string
• there is no body

cy.request(*some request*)
  .then(response => response.json())
  .its('body')
  .then(body => {
    let units = jp.query(body, "$..[?(@.type=='PROJECT')].name");
  })

or

cy.request(*some request*)
  .its('body')
  .then(body => body.json())
  .then(body => {
    let units = jp.query(body, "$..[?(@.type=='PROJECT')].name");
  })

or

cy.request(*some request*)
  .then(response => response.json())
  .then(jsonObj => {
    let units = jp.query(jsonObj, "$..[?(@.type=='PROJECT')].name");
  })