I have to construct a JSON payload that looks like this, can someone help me? I am able to get the straight forward one but unable to build a nested payload. How do I go about adding more nested keys, one inside the other. Also some of the keys and values are dynamic and have to replaced with variables.
{
"format_version": "0.2.19",
"alliances": {
"xyz": {
"environments": {
"prd": {
"teams": {
"abc": {
"action": "edit",
"team": "abc",
"projects": {
"prjabc": {
"project": "prjabc",
"cost_center": "0",
"custom_iam_policies": [],
"iam": {
"view_group_email_name": "abc#email.com",
"sre_admin_group_email_name": "xyz#email.com"
},
"allowed_apis": [
"api1",
"api2"
],
"networks": {
"network1": {
"flags": [
"VM"
],
"region": "sample-region",
"preferred-suffix": "routable"
}
}
}
}
}
}
}
}
}
}
}
Let say you have an object as such
items = {
foo: "bar",
something: "useful"
}
and if you wanted to add other properties or add nested object you can do so like this
subitems = { name: "Johnson" };
items['subitem'] = subitems;
After you've added and finalized the object, you can just use JSON.stringify(items) to convert your object into "payload"
Related
I need help for simple question, to convert this:
{
"data": [{
"data_1": {
"name": "name1",
"value": "value1"
},
"data_2": {
"name": "name2",
"value": "value2"
}
}]
}
To this:
I need help for simple question, to convert this:
{
"data": {
"data_1": {
"name": "name1",
"value": "value1"
},
"data_2": {
"name": "name2",
"value": "value2"
}
}
}
Need to remove '[]'.
Thanks a lot!
If I understand you correctly, it's easy enough. You just need to return 0 element from data array.
Here is an example in JavaScript:
const original = {
data: [{
data_1: {
name: "name1",
value: "value1"
},
data_2: {
name: "name2",
value: "value2"
}
}]
};
const converted = {
data: original.data[0]
};
Ideally you want to make a deep copy of those inner objects, and create a new object with them. There are many ways to do this but one of the easiest methods is to stringify them (ie the first element of the array), and then parse that string. That way new references are built, and changes to the original data won't have an effect on the new data.
const data={data:[{data_1:{name:"name1",value:"value1"},data_2:{name:"name2",value:"value2"}}]};
// Stringify, and then parse the string
const copy = (o) => JSON.parse(JSON.stringify(o));
// Assemble the new object by copying the part
// for reuse
const out = { data: copy(data.data[0]) };
// Check that changes made to the original object
// are not reflected in the new object
data.data[0].data_1.name = 'bob';
console.log(out);
I have been having a bit of trouble appending new dynamic data to a JSON file. To sum up my project, I take in the projectName from an input form at the /new page.
My API is then using the node.js's fs module to create a new JSON file with which I can then append the new dynamic data upon subsequential requests to my form. The variables are 1) projectName (is taken in from my form), 2) activeUser (which is programmed in through an environmental variable), 3) is the date of the request which I am acquiring through a timestamp variable with this function:
const timestamp = (JSON.parse(JSON.stringify(new Date())));
All three of these variables seem to print correctly for 2 subsequent requests and then on the third form submission there seems to be no new data appending to the JSON file. However i am relatively new to node.js and I can't seem to figure out where I am messing this up.
This is my API
pages/api/demos/index.js
import dbConnect from '../../../lib/dbConnect';
import Demo from '../../../models/Demo';
import fs from 'fs';
export default async function handler(req, res) {
const {
query: { id },
method,
} = req
await dbConnect()
switch (method) {
case 'POST':
try {
//check if file exist
if (!fs.existsSync('projects.json')) {
//create new file if not exist
fs.closeSync(fs.openSync('projects.json', 'w'));
}
// read file
const timestamp = (JSON.parse(JSON.stringify(new Date())));
const newFileName = req.body.projectName;
const activeUser = process.env.ACTIVE_USERNAME;
const file = fs.readFileSync('projects.json')
const data = {
"projects": [
{
"username": activeUser,
"pages": [
{
"display": "routes",
"subpages": [
{
"date": timestamp,
"route": newFileName,
"display": newFileName
}
]
}
]
}
]
}
//check if file is empty
if (file.length == 0) {
//add data to json file
fs.writeFileSync("projects.json", JSON.stringify([data]))
} else {
//append data to jso file
const json = JSON.parse(file.toString())
//add json element to json object
json.push(data);
fs.appendFileSync("projects.json", JSON.stringify(data))
}
const demo = await Demo.create(
req.body
)
res.status(201).json({ success: true, data: demo })
} catch (error) {
res.status(400).json({ success: false })
}
break
default:
res.status(400).json({ success: false })
break
}
}
After the first form submission my JSON file projects.json looks like
[
{
"projects": [
{
"username": "projectmikey",
"pages": [
{
"display": "routes",
"subpages": [
{
"date": "2022-09-12T19:03:09.547Z",
"route": "1",
"display": "1"
}
]
}
]
}
]
}
]
and then after the 2nd form submission
[
{
"projects": [
{
"username": "projectmikey",
"pages": [
{
"display": "routes",
"subpages": [
{
"date": "2022-09-12T19:03:09.547Z",
"route": "1",
"display": "1"
}
]
}
]
}
]
}
]{
"projects": [
{
"username": "projectmikey",
"pages": [
{
"display": "routes",
"subpages": [
{
"date": "2022-09-12T19:03:24.466Z",
"route": "2",
"display": "2"
}
]
}
]
}
]
}
Oddly it seems to work for two form submissions and then the data stops appending to my file. This is after the third attempt, (no change to the file)
[
{
"projects": [
{
"username": "projectmikey",
"pages": [
{
"display": "routes",
"subpages": [
{
"date": "2022-09-12T19:03:09.547Z",
"route": "1",
"display": "1"
}
]
}
]
}
]
}
]{
"projects": [
{
"username": "projectmikey",
"pages": [
{
"display": "routes",
"subpages": [
{
"date": "2022-09-12T19:03:24.466Z",
"route": "2",
"display": "2"
}
]
}
]
}
]
}
It seems to stop working at all when I remove the pair of brackets around the initial JSON object. The line I am refering to is fs.writeFileSync("projects.json", JSON.stringify([data]))
I could really use another pair of eyes on this so I can see where I am messing this up! lol Thanks in advance for your time...
Although it feels like you are "appending" to the file, you are actually doing something more complicated.
e.g. before state:
[ "one", "two" ]
desired after-state:
[ "one", "two", "three" ]
Notice that you can't just append text to the before-state JSON because there's already that pesky ] terminating the whole object.
Some failed attempts might look like:
failed attempt to append another entire array
[ "one", "two" ][ "three" ]
This is invalid because there are two root objects.
failed attempt to append just the rest of the array
[ "one", "two" ], "three" ]
That's no good either. The ] at the end of the original file needs to be overwritten or removed, so there's no way to just append. I suppose technically you could seek to the position of the final ] and then continue writing an incomplete object from there. But this is very awkward to remove the final ] from the source and to remove the initial [ from the chunk you're trying to append. It's just a difficult approach.
What you actually want to do is:
read the entire JSON file
parse the JSON into a JavaScript object (or create an empty object if the file didn't exist)
Modify the JavaScript object as necessary (e.g. push into the array to add another element)
stringify the JavaScript object into new JSON
overwrite the entire file with the new JSON.
/* In Node.js:
const fs = require('fs');
try {
initialJSON = fs.readFileSync('example.json');
} catch (ignore) {
initialJSON = '[]';
}
*/
/* Mocked for this example: */
initialJSON = '["one","two"]';
// Common
obj = JSON.parse(initialJSON);
obj.push("three");
finalJSON = JSON.stringify(obj);
/* In Node.js:
fs.writeFileSync('example.json', finalJSON);
*/
/* Mocked for this example: */
console.log(finalJSON);
I am trying to iterate through the array of objects but somehow not getting it right. Can somone please let me know where i am going wrong.
Here is the data
const response = {
"pass": 1,
"fail": 2,
"projects_all": [
{
"projects": [
{
"name": "Project1",
"current": null,
"previous": {
"environment": "qa4nc",
"status": "UNKNOWN",
}
}
]
},
{
"projects": [
{
"name": "Project2",
"current": null,
"previous": {
"environment": "qa4nc",
"status": "FAIL",
}
},
{
"name": "Project3",
"status": "LIVE",
"current": null,
"previous": {
"environment": "qa4nc",
"status": "UNKNOWN",
}
}
]
}
]
}
And here is the code i tried
if(response) {
response?.projects_all?.forEach((projects) => {
projects.forEach(project) => {
if(project.previous !== null) {
//do something here
}
});
});
}
I am trying to iterate through this array of objects but it says projects not iterable. Any help is appreciated to make me understand where i am going wrong.
You were missing iterating over an array properly. A good idea is to format the JSON object that you plan to iterate over. So that you can see what are the arrays and objects, and at what hierarchy.
if (response) {
response?.projects_all?.forEach((project) => {
project?.projects?.forEach((project) => {
console.log(project?.name);
});
}
);
}
response?.projects_all?.forEach((projects) => {
This is the exact correct way to start the code. The problem that happens next is you apparently misunderstand what projects means in the following context
You do projects.forEach(project) as if you think projects is as array. projects is not an array at this point, it is an object that looks like this:
{
"projects": [
{
"name": "Project1",
"current": null,
"previous": {
"environment": "qa4nc",
"status": "UNKNOWN",
}
}
]
}
So I would actually want to do projects.projects.forEach(project => { ... }), or you could change the variable name from projects so it makes more sense to read.
First, determine what shape your response object currently has.
By using the ?. operator your essentially muting JS built in error reporting.
From the context, I assume your response actually looks like this:
console.log(response);
{
data: {
projects_all: [ ... ]
}
}
Therefore your existing code using response?.projects_all doesn't actually hit the projects_all property inside your response.
Can you try the following:
response.data.projects_all.forEach((project) => {
console.info("Project: ", project);
project.projects.forEach((project) => {
console.log(project, project?.name);
});
});
Alternatively, if you don't have a data key inside your response object, you can omit it in the loop:
response.data.projects_all.forEach((project) => {
console.info("Project: ", project);
project.projects.forEach((project) => {
console.log(project, project?.name);
});
});
I'm using Typescript with TypeORM. Using CreateQueryBuilder, I want to receive a nested object. Instead I'm receiving a single flat object as represented in block number two. How can I fix this?
const x = await getConnection()
.createQueryBuilder()
.select(['reportHead', 'order', 'workOrder'])
.from('report_head', 'reportHead')
.innerJoin('reportHead.workOrder', 'workOrder')
.innerJoin('workOrder.order', 'order')
.where(`order.customer.id = :customerId`, { customerId: req.user.customer.id })
.execute();
How can I avoid the data looking like this:
{
"reportHead_id": "asd",
"reportHead_number": "123",
"workOrder_id": "dsa",
"workOrder_status: "OK",
"order_id": "sda",
"order_whatev": "ks"
}
but rather have a neste object like this:
{
"reportHead": {
"id": ...
},
"workOrder": {
"id": ...
},
"order": {
"id": ...
}
}
The solution was to not use .execute(), but rather .getMany().
I wrote the following JavaScript function (part of a larger "class") to help ensure anybody using the object stores attribute values in the "values" property.
function _updateAttributes(attribute, value) {
_attributes[attribute] = { values: { value: value }};
}
It works fine for a flat structure, but falls apart when I start trying to use it for sub-properties.
After running the following code:
myEntity.updateAttribute('name', 'Frankenstein');
myEntity.updateAttribute('name.source', 'John Doe');
I'd like the following structure:
{
"attributes": {
"name": {
"values": {
"value": "Frankenstein"
},
"source": {
"values": {
"value": "JohnDoe"
}
}
}
}
}
Instead, it's coming out like this:
{
"attributes": {
"name": {
"values": {
"value": "Frankenstein"
}
},
"name.source": {
"values": {
"value": "JohnDoe"
}
}
}
}
Is there any clean way to write this JavaScript or will I be faced with splitting out the strings and manually building the structure?
NOTE: I realize even the preferred structure is a little odd, but there's a Java object I'm mapping to that expects this format, so I don't have any options here.
You'll have to parse the string (parse is a bit strong, just a single split('.') with a loop).
But frankly, the cleaner way would simply be:
myEntity.name = {values: 'Frankenstein'};
myEntity.name.source = {values: 'John Doe'};