1--- 2stage: Plan 3group: Project Management 4info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments 5--- 6# Issuable-like Rails models utilities 7 8GitLab Rails codebase contains several models that hold common functionality and behave similarly to 9[Issues](../user/project/issues/index.md). Other examples of "issuables" 10are [Merge Requests](../user/project/merge_requests/index.md) and 11[Epics](../user/group/epics/index.md). 12 13This guide accumulates guidelines on working with such Rails models. 14 15## Important text fields 16 17There are maximum length constraints for the most important text fields for issuables: 18 19- `title`: 255 characters 20- `title_html`: 800 characters 21- `description`: 1 megabyte 22- `description_html`: 5 megabytes 23