Develop Reference

add to my nested json doesn't work correctly

I am trying to "ADD" a new key "resource1" to my below JSON.
I tried jsonFile["entry"][2] = "resource1" . This worked.
Now i want to add an object with "resourceType", "code", "subject"...... like how it is displayed for "resource" in my json below. How do i achieve this???
Like this --> jsonFile["entry"][2]["resource1"] = {"resourceType" : "Observation"} ?????
Need help here
jsonFile:
{
"resourceType" : "Bundle",
"type" : "transaction",
"entry" : [
{
"fullUrl": "urn:uuid:patient",
"resource" : {
"resourceType" : "Patient",
"name" : [
{
"given": ["Lola"],
"family": "Tes"
}
]
},
"request" : {
"method" : "POST",
"url" : "Patient"
}
},
{
"resource" : {
"resourceType" : "Observation",
"code" : {
"coding" : [
{
"system": "http://loinc.org",
"code": "15074-8",
"display": "Glucose [Moles/volume] in Blood"
}
]
},
"subject": {
"type" : "Patient",
"reference" : "urn:uuid:patient"
},
"valueQuantity": {
"value": "5",
"unit": "mmol/l",
"system": "http://unitofmeasure.org",
"code": "mmol/L"
}
},
"request" : {
"method" : "POST"
}
}
]
}

Looks like you are trying to add the property to non existing object.
From your example.
jsonFile["entry"][2] = "resource1"
this worked because you are adding this to existing property(i.e. jsonFile has entry object which is array. So, it's just simply pushing this to array.
But when you are trying this,
jsonFile["entry"][2]["resource1"] = {"resourceType" : "Observation"}
it's trying to add property to non extsting object(i.e. jsonFile has entry, but entry has only 0 and 1 position objects in array. So, this will throw error.
To add property at 2nd position, you need to initialise object at that position and then you can add property.
You can do it in following ways,
jsonFile["entry"][2] = {}
jsonFile["entry"][2]["resource1"] = {"resourceType" : "Observation"}
Or
jsonFile["entry"][2] = {"resource1":{"resourceType" : "Observation"}}
You can add property to object if and only if that object is exists.

"Evaluate" Function that is stored in MongoDB Server

My collection looks like this:
> db.projects_columns.find()
{ "_id" : "5b28866a13311e44a82e4b8d", "checkbox" : true }
{ "_id" : "5b28866a13311e44a82e4b8e", "field" : "_id", "title" : "ID", "sortable" : true }
{ "_id" : "5b28866a13311e44a82e4b8f", "field" : "Project", "title" : "Project", "editable" : { "title" : "Project", "placeholder" : "Project" } }
{ "_id" : "5b28866a13311e44a82e4b90", "field" : "Owner", "title" : "Owner", "editable" : { "title" : "Owner", "placeholder" : "Owner" } }
{ "_id" : "5b28866a13311e44a82e4b91", "field" : "Name #1", "title" : "Name #1", "editable" : { "title" : "Name #1", "placeholder" : "Name #1" } }
{ "_id" : "5b28866a13311e44a82e4b92", "field" : "Name #2", "title" : "Name #2", "editable" : { "title" : "Name #2", "placeholder" : "Name #2" } }
{ "_id" : "5b28866a13311e44a82e4b93", "field" : "Status", "title" : "Status", "editable" : { "title" : "Status", "type" : "select", "source" : [ { "value" : "", "text" : "Not Selected" }, { "value" : "Not Started", "text" : "Not Started" }, { "value" : "WIP", "text" : "WIP" }, { "value" : "Completed", "text" : "Completed" } ], "display" : "function (value, sourceData) { var colors = { 0: 'Gray', 1: '#E67C73', 2: '#F6B86B', 3: '#57BB8A' }; var status_ele = $.grep(sourceData, function(ele){ return ele.value == value; }); $(this).text(status_ele[0].text).css('color', colors[value]); }", "showbuttons" : false } }
You can see that in the very last document that I have stored a function as text.Now the idea is that I will request this data and will be in an Javascript Array format.
But I want to be able to have my function without the quotes! You can see that simply evaluating it will not work because I need to have it still needs to be inside of the object ready to be executed when the array is used.
How can I achieve this?
Thanks for any help!

There are two possible solutions, but neither particularly safe and you should strongly consider why you need to store functions as strings in the first place. That being said, you could do two things.
The simplest is to use eval. To do so, you would have to first parse the object like normal, and then set the property that you want to the result of eval-ing the function string, like so:
// Pass in whatever JSON you want to parse
var myObject = JSON.parse(myJSONString);
// Converts the string to a function
myObject.display = eval("(" + myObject.display + ")");
// Call the function with whatever parameters you want
myObject.display(param1, param2);
The additional parentheses are to make sure that evaluation works correctly. Note, that this is not considered safe by Mozilla and there is an explicit recommendation not to use eval.
The second option is to use the Function constructor. To do so, you would need to restructure your data so that you store the parameters separately, so you could do something like this:
var myObject = JSON.parse(myJSONString);
// displayParam1 and displayParam2 are the stored names of your parameters for the function
myObject.display = Function(myObject.displayParam1, myObject.displayParam2, myObject.display)
This method definitely takes more modification, so if you want to use your existing structure, I recommend eval. However, again, make sure that this is absolutely necessary because both are considered unsafe since outside actors could basically inject code into your server.

Fetch all data from json and display it on the index page

I have the following json:
[
{
"countryId" : 0,
"countryImg" : "../img/france.jpg",
"countryName" : "France",
"countryInfo" : {
"headOfState" : "Francois Hollande",
"capital" : "Paris",
"population" : 66660000,
"area" : 643801,
"language" : "French"
},
"largestCities" : [
{"Paris" : "../img/paris.jpg"},
{"Marseille" : "../img/marseille.jpg"},
{"Lyon" : "../img/lyon.jpg"}
]
},
{
"countryId" : 1,
"countryImg" : "../img/germany.jpg",
"countryName" : "Germany",
"countryInfo" : {
"headOfState" : "Angela Merkel",
"capital" : "Berlin",
"population" : 81459000,
"area" : 357168,
"language" : "German"
},
"largestCities" : [
{"Berlin" : "../img/berlin.jpg"},
{"Munich" : "../img/munich.jpg"},
{"Hamburg" : "../img/hamburg.jpg"}
]
}
]
I need put it in my index.html, however I don't understand why I get only the second object? I need to put two objects in index. Maybe I need to use a loop? How do I do this properly?
I have the following javascript code:
$.ajax({
method: "POST",
url: "../data/data.json"
}).done(function (data) {
/*console.log(data);*/
localStorage.setItem('jsonData', JSON.stringify(data));
var dataFromLocStor = localStorage.getItem('jsonData');
var dataObject = JSON.parse(dataFromLocStor);
console.log(dataObject);
function Countries(){
this.getCountries = function () {
var ulListElem = document.getElementById("list-of-teams").children,
imgCountry = document.createElement('img');
for(country in dataObject){
/*console.log(dataObject[team]['teamName']);*/
imgCountry.setAttribute('src', dataObject[country]['countryImg']);
imgCountry.setAttribute("width", "400");
imgCountry.setAttribute("height", "300");
console.log(country);
ulListElem[0].innerHTML = dataObject[country]['countryId'];
ulListElem[1].innerHTML = dataObject[country]['countryName'];
ulListElem[2].appendChild(imgCountry);
ulListElem[3].innerHTML = dataObject[country]['countryInfo']['headOfState'];
ulListElem[4].innerHTML = dataObject[country]['countryInfo']['capital'];
ulListElem[5].innerHTML = dataObject[country]['countryInfo']['population'];
ulListElem[6].innerHTML = dataObject[country]['countryInfo']['area'];
ulListElem[7].innerHTML = dataObject[country]['countryInfo']['language'];
}
}
}
var countriesDate = new Countries();
countriesDate.getCountries();
});

You are setting the same UI elements (img and ul) twice inside a loop. When the loop runs first time, the values are set from the first array element. When the loop runs second time, the SAME elements are overwritten with the new values.
To properly display all elemts from the JSON array, you need two sets of UI elements in the index.html page e.g. two imgs, two uls etc.

simple ajax request to load external json file

I'm learning ajax.... I am trying to make a basic request from a json file, which is in the same folder as my index.html, but for some reason it says undefined :( I can see the error is on the variable people, but I can't catch why it's undefined....
html:
<div id="personName"></div>
javascript:
var xhr = new XMLHttpRequest(); //it holds the ajax request
xhr.onreadystatechange = function() { //callback
if(xhr.readyState === 4) {
var people = JSON.parse(xhr.responseText);//it takes the string from the response and it converts it in a javascript object
console.log(people);
for (var i=0; i<people.length; i += 1) {
var htmlCode = "<p>" + people[i].name + "</p>";
}
document.getElementById('personName').innerHTML = htmlCode;
} else {
console.log(xhr.readyState);
}
};
xhr.open('GET', 'addresses.json');
xhr.send();
addresses.json:
{
"people": [
{
"position" : "1",
"name" : "Familia Molina Fernandez",
"streetType" : "C/",
"streetName " : "Nuria",
"streetNumber" : "40",
"floor" : "",
"flat" : "",
"zipCode" : "08202",
"city" : "Sabadell",
"state" : "Barcelona",
"country" : "Spain"
},
{
"position" : "2",
"name" : "Familia Astals Fernandez",
"streetType" : "Avda/",
"streetName " : "Polinya",
"streetNumber" : "61",
"floor" : "1",
"flat" : "1",
"zipCode" : "08202",
"city" : "Sabadell",
"state" : "Barcelona",
"country" : "Spain"
}
]
}
Any ideas?
Cheers!!!!

Try console.log(people); and take a look at the object to which your variable refers. (Hint: it's not what you think it is!)
Your variable people refers to an object with only one attribute named "people". That attribute is an array. So with that JSON structure, your code could be written:
var data = JSON.parse(...)
var people = data.people;
(alternatively, I might redesign the JSON and remove the extra level of indirection: just encode the array itself without wrapping it in an object that contains nothing else)

Dojo - Dijit.Tree - Updating Tree

I created a simple tree based on a TreeStoreModel which is backed by ItemFileWriteStore.
I tried updating my tree by deleting and adding items to the store as below, but could not.
dojo.require("dojo.data.ItemFileWriteStore");
dojo.require("dijit.Tree");
dojo.addOnLoad(function () {
var tmpData = [{
"name" : "Dell",
"type" : "business",
"businessid" : "1",
"projectid" : "1",
"submenu" : [{
"name" : "OTP",
"type" : "product",
"productid" : "100"
}
]
}
];
var tmpData1 = [{
"name" : "Lenovo",
"type" : "business",
"businessid" : "1",
"projectid" : "1",
"submenu" : [{
"name" : "OTP",
"type" : "product",
"productid" : "100"
}
]
}
];
var store = new dojo.data.ItemFileWriteStore({
data : {
label : 'name',
items : tmpData
}
});
var treeModel = new dijit.tree.TreeStoreModel({
store : store,
query : {
type : 'business'
},
childrenAttrs : ["submenu"]
});
var divTestTree = dojo.create("div", null, dojo.body(), "first");
var mytree = new dijit.Tree({
model : treeModel
},
divTestTree);
/* Tree is created at this point */
/* Delete the item from the store, for some reason tempData is being reset*/
store.deleteItem(tmpData[0]);
/* save */
store.save();
/* Tree shows up no more at this point */
/* Try adding new item to the store */
store.newItem(tmpData1[0]);
/* save */
store.save();
/*nothing happens! */
});
I followed the lead from here, I must be missing something very trivial here. Please help.

Taken from that page
How do I refresh a Tree from the store?
This isn’t supported. The store needs to notify the tree of any changes to the data. Currently this is really only supported (out of the box) by dojo.data.ItemFileWriteStore, as setting up a client-server dojo.data source where the server notifies the client whenever the data has changed is quite complicated, and beyond the scope of dojo, which is a client-only solution.
The only way to update the tree is to re-draw it again :(

For anyone coming here looking for a solution the problem, 'I suspect there is a bug' is the only answer I got in the forum, so may be this is a bug - goo.gl/M7xg7