How to update Picklist field value set using metadata api or tooling api in apex which is to be called using trigger?

Question

Hi Members,

I have a picklist field containing Names of User as values in custom object A , i want to update the value set of that picklist field according to active users name, if any user is activated , deactivated or first name or last name is changed , so i need to know the solution using both metadata api and tooling api.

Ex- A - PicklistField__c , containing values , User1, User2, User 3 ,User 4

=> Then User1 is deactivated so PicklistField__c should be automatically updated with User1 deactivated from picklist value set and final value set would be User2, User3 , User 4

Thanks.

PE Admin · Answer

When doing it with metadata api , we need to have access to MetadataService cls , I am able to get one way which is through a git file containing metadataservice cls which is 'https://github.com/financialforcedev/apex-mdapi/blob/master/apex-mdapi/src/classes/MetadataService.cls'. I want to know whether it's the way provided by salesforce too or not.

Is this standard one which salesforce has provided and if not then what is the standard approach saleforce provide to access Metadata Service?

Note*- We are lookin for a standard approach for accessing metadata and specifically using metadataservice class.

How to update Picklist field value set using metadata api or tooling api in apex which is to be called using trigger?

Apex

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