Apex Developer Guide

Apex Developer Guide
Getting Started with Apex
Writing Apex
Running Apex
Invoking Apex
Apex Transactions and Governor Limits
Using Salesforce Features with Apex
Actions
Approval Processing
Authentication
Chatter Answers and Ideas
Chatter in Apex
Chatter in Apex Examples
Get Feed Elements From a Feed
Get Feed Elements From Another User’s Feed
Get Community-Specific Feed Elements from a Feed
Post a Feed Element
Post a Feed Element with a Mention
Post a Feed Element with Existing Content
Post a Rich-Text Feed Element with Inline Image
Post a Rich-Text Feed Element with a Code Block
Post a Feed Element with a New File (Binary) Attachment
Post a Batch of Feed Elements
Post a Batch of Feed Elements with New (Binary) Files
Define an Action Link and Post with a Feed Element
Define an Action Link in a Template and Post with a Feed Element
Edit a Feed Element
Edit a Question Title and Post
Like a Feed Element
Bookmark a Feed Element
Share a Feed Element (prior to Version 39.0)
Share a Feed Element (in Version 39.0 and Later)
Post a Comment
Post a Comment with a Mention
Post a Comment with an Existing File
Post a Comment with a New File
Post a Rich-Text Comment with Inline Image
Post a Rich-Text Feed Comment with a Code Block
Edit a Comment
Follow a Record
Unfollow a Record
Get a Repository
Get Repositories
Get Allowed Item Types
Get Previews
Get a File Preview
Get Repository Folder Items
Get a Repository Folder
Get a Repository File Without Permissions Information
Get a Repository File with Permissions Information
Create a Repository File Without Content (Metadata Only)
Create a Repository File with Content
Update a Repository File Without Content (Metadata Only)
Update a Repository File with Content
Chatter in Apex Features
Using ConnectApi Input and Output Classes
Understanding Limits for ConnectApi Classes
Serializing and Deserializing ConnectApi Objects
ConnectApi Versioning and Equality Checking
Casting ConnectApi Objects
Wildcards
Testing ConnectApi Code
Differences Between ConnectApi Classes and Other Apex Classes
Moderate Chatter Private Messages with Triggers
Moderate Feed Items with Triggers
Communities
Email
Metadata
Platform Cache
Salesforce Knowledge
Salesforce Connect
Salesforce Reports and Dashboards API via Apex
Force.com Sites
Support Classes
Territory Management 2.0
Visual Workflow
Integration and Apex Utilities
Debugging, Testing, and Deploying Apex
Apex Language Reference
Appendices
Glossary
PDF

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Follow a Record

This example calls follow(communityId, userId, subjectId) to follow a record.
1ChatterUsers.ConnectApi.Subscription subscriptionToRecord = ConnectApi.ChatterUsers.follow(null, 'me', '001RR000002G4Y0');