http://musicbrainz.org/ws/2/release/?query=release:fred&fmt=json
i am working with this api.
i have fetched it successfully.
how can i access the value of those keys which have - between them, for ex- status-id track-count
In JavaScript, you can access a property in 2 ways: value.innervalue or value["innervalue"]. You can access the properties using the 2nd way, as it works with dashes in the name.
Consider having a look at the following answer for better understanding if required
Access JSON or JS property using string
Related
I'm making a website that gets its info from a RESTapi I've written and hosted myself, have had no data problems thus far.
Now I'm trying a simple retrieve of a json object and I get all the info correctly as shown here in the API. (Visualized & tested in Swagger)
As you can clearly see, it retrieves it the complete object and underlying objects correctly (blurred sensitive info).
Pay attention to the property "AmountOfEggs" though.
Now when i call this api endpoint (exactly the same way) in my site and console.log the result.data, this is the feedback.
Now for some reason I can't recieve AmountOfEggs in my frontend.
I've recreated the entire object, wrote different names, passed different props (Id, NumberBus, etc are passed in this situation with no problem, which are also int (number) types).
I have no idea why this property gets "dropped" in the transfer and filled with/defaults to an empty string.
Any help would be greatly appreciated.
I found where it went wrong and it's due to different factors.
To start, I am making this site using the Vue framework, which has reactive components, which means, data gets adjusted and you get live updated components on your views/pages.
In the page that contained the call, I also wanted to add dynamic styling. The code I used for this is the following:
v-for="seller in retrievedSellers"
:key="seller.Id"
:class="[
'sellerStyle'
, (seller.AmountOfEggs = 0 ? 'grey-out-seller' : ''),
]"
Now two things to note, first of all this might look like backend coding but this is Vue logic on the .vue file which handles the dynamic options that Vue provides so I never thought to look here for the error.
The error of couse is the 'seller.AmountOfEggs = 0' part, using one equal sign (assignment) instead of two (comparison).
So I learned,
Vue doesn't throw errors on assignments in code that is used to generate frontend (where you should NEVER alter your data).
My console.log was the moment the response of the API came in, where apparently it was already assigned a new value (due to my code above) before hitting the console.log.
It still greatly surprises me that Vue handles ^this^ first to make sure your reactive components are up to date before finishing the api call itself.
However, I still don't understand how it said "" instead of 0.
I'm using typescript (javascript strongly-typed) so it definitely wants to contain a number and not an empty string. Even in the declaration of my DTO the property is defined as (and expects) a number.
When we use core-localstorage
<core-localstorage name="my-app-storage" value="{{value}}"></core-localstorage>
where it actually store the data? In some file on the HDD? What is the path?
LocalStorage is one of some ways you can store data in the client end in the Hard-drive, different browsers use different locations to save this file.
LocalStraoge makes use of JSON to store information worth up to 10MB(Might differ from browsers).
Usually, storing and retrieving from Local-storage is done through JavaScript but Polymer team has made a custom element you can use to make this process more Declarative.
Using the core-localstorage element:
<core-localstorage name="HOW YOU ACCESS THIS DATA" value="{{THE ACTUAL DATA YOU WANT TO STORE}}"></core-localstorage>
name attribute is how you access this data, every peice of data you store has to have a name with which you can set or get it's value through.
value attribute is the actual data you want to store, it can be an array, object, number or a string.
More documentations about core-localstorage and localstorage can be found at:
https://www.polymer-project.org/0.5/docs/elements/core-localstorage.html
http://diveintohtml5.info/storage.html
I want to have a single schema file with many definitions.
I then want to validate messages against different definitions within that schema.
Is there a way of doing this with a JSON Schema?
I'm trying two NodeJS validators to see which works best:
https://github.com/geraintluff/tv4
and https://github.com/tdegrunt/jsonschema
Apologies if this is not logically possible - I'm new to JSON Schema.
Cross-posted to https://github.com/geraintluff/tv4/issues/170 and https://github.com/tdegrunt/jsonschema/issues/94
I found what I needed in the API section.
tv4.addSchema() and tv4.getSchema(...#subschema_id')
I'm getting confused on a few things in regards to wcf rest.
If you call a login method, should I use a POST or GET? After implementing a POST, I started to find various articles saying you should only use post to update data, and get for retrieving data. Which is the most appropriate method?
If I had to change the Login method from a Post to a Get, how would I call this?
http://....myservice.svc/login/{username}/{passpord} or is there another way to call this?
Note that in my post method, I'm passing and returning data in json format.
I need to create a search function that requires to pass various parameters i.e. list, string, list, etc... I assume in this instance I would have to define GET method, but again how to I pass these list of objects? Convert them to json first and pass them as parameters?
A brief url sample would be great.
Ok, I guess I'll answer my own question based on further finding when researching it and remember that my answer is based on using JSON as parameters. I'm not sure how it would behave if xml was used as I did not try it.
It appears to make more sense to use POST when logging in as you do not want to display the information you are posting via a url. You could encrypt the data and pass it in the url using a GET method... Again I could be wrong, but that's how I interpreted the various articles I read.
Again, in this instance, it appears POST is the best solution if a) you require a large amount of data to be passed to your url and b) if you do not want to show this data to the user. If your query only requires simple parameters (i.e. userid, type, etc...) and you don't mind showing this info, you can use the GET method.
If you require to pass multiple parameters to a function, you should instead pass a single parameter. This parameter should be a single object. This object should be made of all the parameters you wanted to use in the first place, this way, when using the POST method, this object can easily be converted to JSON and it will handle passing multiple parameters through a single object and it will handle numeric, string, list<>, array<>, etc... very nicely.
I am using Sencha GXT3 app for a html interface. Data is retrieved in json format from a REST service. How exactly do I fill a store with a single object for reading and later manipulating and saving?
This is not about lists of objects, but really a specific single json map which I want to load into a store.
Any help would be highly appreciated.
For Stores you have basically two choices list or tree. Right? GXT 3 store api
You say it's not a list so did you see the src of their json tree example
Personally for a single object, I use a list. I mean it's a list of size 1. json list example
Of those two examples, json tree example is easier to understand since it's not using a grid I think. There are tree grid examples too but none I immediately see with json.
This is for version 3. I see no reason why you'd want to start with 2 since 3 is much more similar to native gwt and you can mix 2 and three code (see their tutorial) until you get everything ported to the newer version. Just saying ...