Final answer:
Ana can use a version control system to commit only her work by working in a separate branch, committing her changes there, and then integrating them into the main codebase through a pull request or merge request. She should also sync with the main branch before committing to avoid conflicts.
Step-by-step explanation:
If Ana and Dave are working on the same object, and Ana wants to ensure that only her work is committed, consisting of 5 fields and 2 validation rules, she will likely need to use a version control system (VCS) like Git. Working in this manner suggests a collaborative environment, and to avoid overwriting each other's work, both Ana and Dave should work in separate branches or feature branches. Once Ana completes her work, she can commit her changes to her branch and then create a pull request or merge request for her specific additions to be integrated into the main codebase. This process allows for review and minimizes the chances of conflict between the contributions made by Ana and Dave.
Before committing her changes, Ana should perform a fetch and rebase or merge from the main branch to her feature branch to ensure she has the latest changes and to resolve any potential merge conflicts locally. Assuming no direct conflicts with Dave's work, Ana can proceed with committing her changes and resolving any conflicts that arise when she integrates her work with the main codebase, ensuring that only her 5 fields and 2 validation rules are added.