How do field types convert from json and SF object

Question

I am working on a lwc. I am passing a array of json objects into a apex method. The parameter for the apex method is a List<Work_Items> where work items is a SF object. At run time apex converts the json to a list of work items but how to the sobjects field types convert. I have a flag field and need to check it. Will the json value for the field be converted to a bool on the sobject or will it be a string?

Answer 1

The types are all pretty much what you'd expect from JSON. Boolean values will be true/false (not String values). What follow is, I believe, what each type will be converted to, based on my experience. I haven't tested all of these, though, so a few may be incorrect; please feel free to let me know if any of these are wrong.

Apex Schema.DisplayType	JavaScript
address	Object of Fields e.g. { street: String, city: String, ... }
any	String
base64	String
Boolean	Boolean true or false
Combobox	String
Currency	Number
DataCategoryGroupReference	String
Date	String
DateTime	String
Double	Number
Email	String
EncryptedString	String
ID	String
Integer	Number
Location	Object of fields { lat: Number, long: Number, ... }
Long	Number
MultiPicklist	String, semi-colon separated
Percent	Number
Phone	String
Picklist	String
Reference	Id or Object of fields e.g. { name: String, ... }
String	String
TextArea	String
Time	String
URL	String