Preface: When adding or modifying fields, you can configure the "Backend Addition Information Processing Function," "Backend Modification Information Processing Function," "Frontend Addition Information Processing Function," or "Frontend Modification Information Processing Function." These allow you to specify separate functions for processing field content; this approach is commonly used for models that have special requirements regarding the storage format of field content. Below is a brief explanation of the basic steps for creating and configuring these processing functions: 1. Write the processing function; 2. Copy the function to e/c...