In the following JSON how to access id and name
console.log($scope.mylist)
{"data":"{\"projects\":[{\"id\":\"3\",\"title\":\"MYCLOUD\",\"desc\":\"DESC\"}]}"}
I tried the following
console.log($scope.mylist.data) //undefined
console.log($scope.mylist["data"])//undefined
console.log($scope.mylist.projects)//undefined
console.log($scope.mylist["projects"]) //undefined
Your data property contains JSON, so you need to JSON.parse that too.
$scope.mylist.data.projects = JSON.parse($scope.mylist.data);
Then you should be able to access it with
$scope.mylist.data.projects[0].id //etc
Though there's an underlying problem of how you're getting/sending that JSON.
Related
Im using the following loop to get data from a table which is working fine:
database.once("value", function(snapshot){
snapshot.forEach(snap => {
log.console(snap.val().about_me)
})
Its displaying the data to logs as expected, But i can't seem to get the object id?
I need to get the value 49GRZb8B31MUfpBN3zvHKOHCMOa2
I have tried:
snap.val().key;
This returns undefined
And have tried snap.val()[0];
which returns me everything in the object
snap is a DataSnapshot type object. You can see that it has a property called key. So, you need to reference that property directly on the DataSnapshot like this:
snap.key // correct
But not via the raw data object like this:
snap.val().key // incorrect, you have no child named 'key' in your data
I have a JSON object in my database that contains html inside it. I pass the object as part of a model to my view. I need to access the object and read it in the javascript files for the page. However when i try and assign the object to a global variable in my html file i cannot access it in my javascript file.
I tried reading the object as a string it returns decoded html (
"page-1":) which i cant do anything with. If i call #Html.Raw(#Model.CourseContent.ExpectedResult) it created the JSON object as expected. However in my javascript file it is listed as undefined. I have no idea how to solve this.
#model DataTransferObjects.Models.UserCourseAndContent
<script>
var totalPages = '#Model.CourseContent.TotalPages';
var expectedResults = #HTML.Raw(#Model.CourseContent.ExpectedResult)
</script>
The json object that comes out when i use the above code looks like
var expectedResults = {
"page-1": "<head></head><body></body>",
"page-3": "<head></head><body><h1>My Cool News Article</h1><p>Welcome
to my news article, you’ll find some cool news here.</p>
<Our most recent
news</<p>Below you’ll find my most recent news!</p></body>"
};
I expected it to be an actual json string but instead ive got an object (?) i am confused as to how to decode the html out of it then turn the resulting json obejct into a json string to be read in the javascript file.
Any help would be great!
var expectedResults = {
"page-1": "<head></head><body></body>",
"page-3": "<head></head><body><h1>My Cool News Article</h1><p>Welcome
to my news article, you’ll find some cool news here.</p>
<Our most recent
news</<p>Below you’ll find my most recent news!</p></body>"
};
// Parse JSON
const parsedJSON = JSON.parse(JSON.stringify(expectedResults));
// Access to properties
const page-1 = parsedJSON['page-1'];
const page-3 = parsedJSON['page-3'];
I'm trying some basic API Connect tutorials on IBM's platform (running locally using loopback) and have got completely stuck at an early point.
I've built a basic API service with some in-memory data and setter / getter functions. I've then built a separate API which takes two GET parameters and uses one of my getter functions to perform a search based on two criteria. When I run it, I successfully get a response with the following JSON object:
[{"itemId":1,"charge":9,"itemSize":2,"id":2}]
I've then tried to add a piece of server logic that modifies the response data - at this point, I'm just trying to add an extra field. I've added a Javascript component in the Assemble view and included the following code (taken from a tutorial), which I thought should modify the message body returned by the API while still passing it through:
//APIC: get the payload
var json = apim.getvariable('message.body');
//console.error("json %s", JSON.stringify(json));
//same: code to inject new attribute
json.platform = 'Powered by IBM API Connect';
//APIC: set the payload
//message.body = json;
apim.setvariable('message.body', json);
Instead of getting an extra JSON parameter ("platform"), all I get is a 500 error when I call the service. I'm guessing that I'm doing something fundamentally wrong, but all the docs suggest these are the right variable names to use.
You can't access json.platform but at that point json variable is json type. Are you sure that you can add a property to a json type variable if your json object lacks of that property? I mean: What if you first parse the json variable of json type to a normal object, then add new property, and finally stringify to json type again for body assigning purposes?
var json = JSON.parse(apim.getvariable('message.body')); //convert to normal object
json.platform = 'Powered by IBM API Connect'; //add new property
apim.setvariable('message.body', JSON.stringify(json)); //convert to json again before setting as body value
You need to get the context in some determined format, and in this function do your logic. For example if your message is in json you need to do:
apim.readInputAsJSON(function (error, json) {
if (error)
{
// handle error
apim.error('MyError', 500, 'Internal Error', 'Some error message');
}
else
{
//APIC: get the payload
var json = apim.getvariable('message.body');
//console.error("json %s", JSON.stringify(json));
if(json){
//same: code to inject new attribute
json.platform = 'Powered by IBM API Connect';
//APIC: set the payload
//message.body = json;
apim.setvariable('message.body', json);
}
}
});
Reference:
IBM Reference
You have the message.body empty, put a invoke/proxy policy before your gateway/javascript policy for example.
I've been trying to display some data from a web service with no luck
I tried this
ngOnInit(){
//console.log(this._productoService.getDeudas());
this._productoService.getDeudas().subscribe(
result =>{
console.log(result.Cuotas);
}
);
}
}
and i got this error
Property 'Cuotas' does not exist on type 'Response'.
this is the data i got in the console
any ideas? thanks in advance
Response is an object and therefore you can use...
result => { result ['Cuotas']; }
... the [result ['Cuotas']] field access stands out because you use bracket notation to access the results field. If you tried to write [result.Cuotas], TypeScript would correctly complain that the Object coming back from HTTP does not have a results property. That's because while HttpClient parsed the JSON response into an Object, it doesn't know what shape that object is.
https://angular.io/guide/http
I am using postgres row_to_json function to get the data that were stored through JSON.stringify(). However, when I retrieve it and do JSON.parse(), it gave me "unexpected token ," error message.
My original data from frontend:
{
"company":[
{"name":"test company"},
{"ceo":"John"}
]
}
I do JSON.stringify(myData.company) and store it to postgres.
When I retrieve it, I have row_to_json function to get the data.
and the console.log(myRetrieveData) become
{"{\"name\":\"test company\"}","{\"ceo\":\"John\"}"}
I used JSON.parse(myRetrieveData) and got 'unpexted token ,' error.
I understand row_to_json turn it into json and can't be used on JSON.parse but the function is needed for my other data.
I am not sure how to fix this. Can anyone help me about it?
Thanks a lot!
Looks like the JSON that you retrieved from the query is not of the proper format for it to be parsed. Inorder to avoid this please make sure that the JSON being stored into the DB is of proper JSON format, so that it parsed.If this is not achievable the response obtained from the db has to be modified to proper JSON. With the above data it can be done as follows.
var improperJson = '{"{\"name\":\"test company\"}","{\"ceo\":\"John\"}"}';
var properJson = improperJson.replace(/","/g, ",").replace(/^{"/, "[").replace(/"}$/, "]");
console.log(JSON.parse(properJson));//should give you the parsed JSON