I have a API REST that return a JSON:
My code is:
and my Visualforce is (Javascript):
How to get all data and print inside of the table en HTML(Visualforce page) ???
When a try to get all data i get a ERROR:
FATAL_ERROR System.TypeException: Invalid conversion from runtime type Map<String,ANY> to List<ANY>
I try to use information of :
- https://developer.salesforce.com/docs/atlas.en-us.apexref.meta/apexref/apex_class_System_Json.htm
- https://developer.salesforce.com/docs/atlas.en-us.apexref.meta/apexref/apex_class_System_Json.htm
but i don't have a good solution.
Can you explain me how to solve this error or problem ?
#Collaboration #Apex #Visualforce Pages #Data Management #Ask An Expert #Lightning
You can not deserialize your JSON object into a list<anything> because your JSON is not representing a list. If I don't mess things up a list is in the JSON notation marked with [ listContent ]. Your debug message shows curly brackets { which are used for an object. If you only get one instance of an object, do it that way:
Wrappers wrappers = (Wrappers) JSON.deserialize(res.getBody(), Wrappers.class);
And of course for the other way:
Start your JSON string with [ and end it with ]. Then parse it with:
List<Wrappers> wrappersList = (List<Wrappers>) JSON.deserialize(res.getBody(), List<Wrappers>.class);
Respect case sensitivity if you define an Apex class for JSON deserialization. (But I think you did that part ;))
The JSON Apex class is well documented: https://developer.salesforce.com/docs/atlas.en-us.apexref.meta/apexref/apex_class_System_Json.htm
And another crazy link, this time to w3schools about JSON notation :D https://www.w3schools.com/js/js_json_arrays.asp
(And a little side thought: Write Apex classes in PascalCase :D if there is no other naming convention in your company.) If you have any questions feel free to ask. Happy Coding ;)
