Develop Reference

Fetch value based in that same JSON key value

I have the JSON like
var resultJSON = `{
"data": {
"total": 1,
"list_name": "title",
"title": {
"id": 53,
"name": "Sonu",
"mobileNo": "6543213456",
"address": "Greeny Pathway",
"city": "NewYork",
"mode": "Weekly",
"duration": "15",
"qty": null
},
"download": [{
"time": "16789042",
"date": "26 - 01 - 2020"
}]
}
}`;
I expect the output:
{
"total": "1",
"list_name": "title",
"name": "sonu",
"mobileno": "6543213456"
}
Here "list_name": "title" is dynamic, sometimes it will come "list_name": "book", based on that above mentioned response I want to get.

Something like this? I had to fix your invalid JSON
You can make it more clever if you study https://javascript.info/destructuring-assignment in depth
const resultJSON = `{
"data": {
"total": 1,
"list_name": "title",
"title": {
"id": 53,
"name": "Sonu",
"mobileNo": "6543213456",
"address": "Greeny Pathway",
"city": "NewYork",
"mode": "Weekly",
"duration": "15",
"qty": null
},
"download": [{
"time": "16789042",
"date": "26-01-2020"
}]
}
}`
const data = JSON.parse(resultJSON).data
const content = data[data.list_name];
let newObj = {}
newObj["total"] = data["total"];
newObj["list_name"] = data["list_name"];
newObj["name"] = content["name"];
newObj["mobileNo"] = content["mobileNo"];
console.log(newObj)

Knexnest query not returning data in array even though this is what is expected

I have this knexnest query:
const query = knex.select([
'notes.id AS _id',
'notes.note AS _note',
'notes.timestamp AS _timestamp',
'customers.id AS _customerId',
'users.name AS _name',
'products.id AS _productId',
'tags.id AS _tags_tagId',
'tags.title AS _tags_tagTitle',
'tags.type AS _tags_tagType',
]).from('notes')
.join('users', 'notes.user_id', 'users.id')
.join('customers', 'notes.customer_id', 'customers.id')
.leftJoin('products', 'notes.product_id', 'products.id')
.leftJoin('note_tags', 'notes.id', 'note_tags.note_id')
.leftJoin('tags', 'note_tags.tag_id', 'tags.id')
.where('customers.id', customerId);
return knexnest(query);
My response json looks like this:
{
"id": 47,
"note": "This is an updated1 note",
"timestamp": "2019-07-12T15:17:27.281Z",
"customerId": 111781,
"name": "Paul",
"productId": 1,
"tags": {
"tagId": 4,
"tagTitle": "price",
"tagType": "product"
}
}
The problem is that the database returns more than one tag, only one is displayed. I'm expecting a response like this:
{
"id": 47,
"note": "This is an updated1 note",
"timestamp": "2019-07-12T15:17:27.281Z",
"customerId": 111781,
"name": "Paul",
"productId": 1,
"tags": {[
{
"tagId": 4,
"tagTitle": "price",
"tagType": "product"
},
{
"tagId": 5,
"tagTitle": "quality",
"tagType": "product"
}
]}
}
Have I got something wrong in my query that is causing this?

Got it. I was missing double __ in the tags:
'tags.id AS _tags__tagId',
'tags.title AS _tags__tagTitle',
'tags.type AS _tags__tagType'

C# Serialize Dictionary JSON

I am trying to serialize a dictionary in C# using JSON.NET and then consume it in a web application. This is the format I am returned but am unable to use it as I do not think it is in the correct format. I have tried the following:
Dictionary Serialization:
[JsonExtensionData]
public static Dictionary<string, object> objectDictionary = new Dictionary<string, object>();
string parametersJSON = JsonConvert.SerializeObject(objectDictionary, Formatting.Indented);
var x = get.getData;
x.p11.Name
{
"p11": {
"Name": "Parameter 1",
"Value": "1.00",
"Unit": "m",
"MinValue": "0.00",
"MaxValue": "5.00",
"Number": 11,
"DefaultValue": "0.00"
},
"p546": {
"Name": "Parameter 2",
"Value": "0.0000",
"Unit": "Hz",
"MinValue": "-480.000",
"MaxValue": "480.000",
"Number": 546,
"DefaultValue": "0.0000"
},
"p7": {
"Name": "Parameter 3",
"Value": "0.00",
"Unit": "Amps",
"MinValue": "0.00",
"MaxValue": "44.00",
"Number": 7,
"DefaultValue": "0.00"
}}

Nothing is wrong with your data:
var x = JSON.parse(jsonstr);
var name = x["p11"].Name;
For more information:
A Dictionary is parsed into an associative array (http://www.w3schools.com/js/js_arrays.asp)

Using underscore.js to find values in deeply nested JSON

I'm pretty new to Javascript, and I just learned about underscore.js. I have a deeply nested JSON object, and I need to use underscore to find key/value pairs, which I will then use to populate various HTML tables. If the structure was more shallow, using something like _.pluck would be easy, but I just don't know how to traverse past the first couple of nesting levels (i.e. surveyGDB, table, tablenames). The JSON object comes from an XML that is comprised of multiple nesting structures (mashed up from different database tables).
var JSONData =
"surveyGDB": {
"filename": "..\\Topo\\SurveyGeoDatabase.gdb",
"table": {
"tablename": [
{
"#text": "SurveyInfo\n ",
"record": {
"OBJECTID": "1",
"SiteID": "CBW05583-345970",
"Watershed": "John Day",
"VisitType": "Initial visit",
"SurveyInstrument": "Total Station",
"ImportDate": "2015-07-22T09:08:42",
"StreamName": "Duncan Creek",
"InstrumentModel": "TopCon Magnet v2.5.1",
"FieldSeason": "2015"
}
},
{
"#text": "QaQcPoints\n ",
"record": [
{
"OBJECTID": "1",
"TIMESTAMP": "2015-07-22T09:18:43",
"Code": "tp",
"Count": "357"
},
{
"OBJECTID": "2",
"TIMESTAMP": "2015-07-22T09:18:43",
"Code": "tb",
"Count": "92"
},
{
"OBJECTID": "3",
"TIMESTAMP": "2015-07-22T09:18:43",
"Code": "to",
"Count": "8"
},
{
"OBJECTID": "4",
"TIMESTAMP": "2015-07-22T09:18:43",
"Code": "bl",
"Count": "279"
},
{
"OBJECTID": "5",
"TIMESTAMP": "2015-07-22T09:18:43",
"Code": "bf",
"Count": "18"
}
]
},
{
"#text": "QaQcPolygons\n ",
"record": [
{
"OBJECTID": "1",
"TIMESTAMP": "2015-07-22T09:43:08",
"SurveyExtentCount": "",
"WaterExtentCount": "",
"ChannelUnitsCount": "",
"ChannelUnitsUnique": ""
},
{
"OBJECTID": "2",
"TIMESTAMP": "2015-07-22T13:35:15",
"SurveyExtentCount": "1",
"WaterExtentCount": "1",
"ChannelUnitsCount": "21",
"ChannelUnitsUnique": "21"
}
]
}
]
}
}
}
For instance, I wanted all of the values for 'Code' in the 'QaQCPoints' table, so I tried:
var codes = _.flatten(_.pluck(JSONData.surveyGDB.table.tablename[1].record[0], "Code" ));
console.log(codes);
In the console, this returns an array with a length of 5, but with blank values.
What am I doing wrong?
I'd also rather search for the 'Code' values in the table based on something like the '#text' key value, instead of just using it's position in the object.

If I understood you correctly, you want to always search the record array within JSONData.surveyGDB.table.tablename array for some queries. This means you need to find the record based on some parameter and return something from the found record.
Do note that the record property is sometimes an array and sometimes an object (for table SurveyInfo) in your example so I'll assume you need to take this into account.
You can make a small function to extract data and handle both objects and arrays:
function extract(record, prop) {
if (Array.isArray(record)) {
return _.pluck(record, prop);
} else {
return record[prop];
}
}
Usage example:
I wanted all of the values for 'Code' in the 'QaQCPoints' table.
I'd also rather search for the 'Code' values in the table based on something like the '#text' key value, instead of just using it's position in the object.
To achieve this you first find a record using _.find, and then extract Code values from it using the method above:
var table = JSONData.surveyGDB.table.tablename;
// find an item that has `#text` property equal to `QaQcPoints`
var item = _.find(table, function(r) {
return r['#text'] === 'QaQcPoints';
});
// extract codes from the found item's record property
var code = extract(item.record, 'Code');
// output ["tp", "tb", "to", "bl", "bf"]
Running sample:
var JSONData = {
"surveyGDB": {
"filename": "..\\Topo\\SurveyGeoDatabase.gdb",
"table": {
"tablename": [{
"#text": "SurveyInfo",
"record": {
"OBJECTID": "1",
"SiteID": "CBW05583-345970",
"Watershed": "John Day",
"VisitType": "Initial visit",
"SurveyInstrument": "Total Station",
"ImportDate": "2015-07-22T09:08:42",
"StreamName": "Duncan Creek",
"InstrumentModel": "TopCon Magnet v2.5.1",
"FieldSeason": "2015"
}
}, {
"#text": "QaQcPoints",
"record": [{
"OBJECTID": "1",
"TIMESTAMP": "2015-07-22T09:18:43",
"Code": "tp",
"Count": "357"
}, {
"OBJECTID": "2",
"TIMESTAMP": "2015-07-22T09:18:43",
"Code": "tb",
"Count": "92"
}, {
"OBJECTID": "3",
"TIMESTAMP": "2015-07-22T09:18:43",
"Code": "to",
"Count": "8"
}, {
"OBJECTID": "4",
"TIMESTAMP": "2015-07-22T09:18:43",
"Code": "bl",
"Count": "279"
}, {
"OBJECTID": "5",
"TIMESTAMP": "2015-07-22T09:18:43",
"Code": "bf",
"Count": "18"
}]
}, {
"#text": "QaQcPolygons",
"record": [{
"OBJECTID": "1",
"TIMESTAMP": "2015-07-22T09:43:08",
"SurveyExtentCount": "",
"WaterExtentCount": "",
"ChannelUnitsCount": "",
"ChannelUnitsUnique": ""
}, {
"OBJECTID": "2",
"TIMESTAMP": "2015-07-22T13:35:15",
"SurveyExtentCount": "1",
"WaterExtentCount": "1",
"ChannelUnitsCount": "21",
"ChannelUnitsUnique": "21"
}]
}]
}
}
}
function extract(record, prop) {
if (Array.isArray(record)) {
return _.pluck(record, prop);
} else {
return record[prop];
}
}
var table = JSONData.surveyGDB.table.tablename;
var item = _.find(table, function(r) {
return r['#text'] === 'QaQcPoints';
});
console.dir(item);
var code = extract(item.record, 'Code');
console.log(code);
<script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js"></script>

You have a two stage problem. Stage one is figuring out which table is QaQcPoints. If that's always JSONData.surveyGDB.table.tablename[1], you're good.
The next stage is getting your data out. You can use native array manipulation most of the time (unless you're on really old browsers). So:
var table = JSONData.surveyGDB.table.tablename[1].record;
var codeArray = table.map(function(val) { return val.Code; });
Will do the trick.

Creating Complex JSON Object using JavaScript Code

I am bit new to JSON world. And I have to use JavaScript to create following type of JSON structure. Not sure how to achieve this. Tried with following code, but unable to add second element("12101") as well as people to JSON Structure is where I am struggling.
var chat = {};
chat = {"101":{}};
chat["101"].people= {};
chat["101"].people = {"L0b12leL-Ar9GYKoAAAC":{}};
chat["101"].people.L0b12leL-Ar9GYKoAAAC = {"name":"vikram#qech.com"};
chat["101"].room= {};
JSON structure to achieve
{
"101": {
"people": {
"L0b12leL-Ar9GYKoAAAC": {
"name": "vikram#qtech.com",
"inroom": "f787f316-6424-491b-b779-cfc396f0f8a1",
"owns": "f787f316-6424-491b-b779-cfc396f0f8a1",
"countrycode": "in",
"device": "desktop",
"roomname": "R1"
},
"qKCglYWI1hRhZUZCAAAD": {
"name": "Ishim",
"inroom": "2e52905d-951c-4990-b9b7-2f3fc0602922",
"owns": "2e52905d-951c-4990-b9b7-2f3fc0602922",
"roomname": "Ra"
}
},
"room": {
"f787f316-6424-491b-b779-cfc396f0f8a1": {
"name": "R1",
"id": "f787f316-6424-491b-b779-cfc396f0f8a1",
"owner": "L0b12leL-Ar9GYKoAAAC",
"people": [
"L0b12leL-Ar9GYKoAAAC"
],
"status": "available"
},
"2e52905d-951c-4990-b9b7-2f3fc0602922": {
"name": "Ra",
"id": "2e52905d-951c-4990-b9b7-2f3fc0602922",
"owner": "qKCglYWI1hRhZUZCAAAD",
"people": [
"qKCglYWI1hRhZUZCAAAD"
],
"status": "available"
}
}
},
"12101": {
"people": {
"K-Ar9GYKoAAAC": {
"name": "Rahul.com",
"inroom": "f787f316-6424-491b-b779-cfc396f0f8a1",
"owns": "f787f316-6424-491b-b779-cfc396f0f8a1",
"countrycode": "in",
"device": "desktop",
"roomname": "R1"
},
"I1hRhZUZCAAAD": {
"name": "Vipul",
"inroom": "2e52905d-951c-4990-b9b7-2f3fc0602922",
"owns": "2e52905d-951c-4990-b9b7-2f3fc0602922",
"roomname": "Ra"
}
},
"room": {
"b779-cfc396f0f8a1": {
"name": "Rahul-R1",
"id": "f787f316-6424-491b-b779-cfc396f0f8a1",
"owner": "L0b12leL-Ar9GYKoAAAC",
"people": [
"L0b12leL-Ar9GYKoAAAC"
],
"status": "available"
},
"b9b7-2f3fc0602922": {
"name": "Vipul-Room1",
"id": "2e52905d-951c-4990-b9b7-2f3fc0602922",
"owner": "qKCglYWI1hRhZUZCAAAD",
"people": [
"qKCglYWI1hRhZUZCAAAD"
],
"status": "available"
}
}
}
}

This is invalid because the property name contains dashes.
chat["101"].people.L0b12leL-Ar9GYKoAAAC = {"name":"vikram#qech.com"};
To access it correctly, put it in quotes
chat["101"].people["L0b12leL-Ar9GYKoAAAC"] = {"name":"vikram#qech.com"};

Use bracket notation as a property accessor like this:
chat["12101"].people = {};
chat["101"].people["L0b12leL-Ar9GYKoAAAC"] = {"name":"vikram#qech.com"};
With it, it’s just a routine piece of work. It probably didn’t work right away since dot notation property access requires a valid identifier name. With bracket notation, you can use any string like "L0b12leL-Ar9GYKoAAAC".
Also note that in JSON, anything works as a property name too, as long as it is put in quotes. {"L0b12leL-Ar9GYKoAC":true} is as valid as {"💖":true}.