2019-10-07 06:06:10 +00:00
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# Issuable-like Rails models utilities
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2019-11-21 15:06:17 +00:00
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GitLab Rails codebase contains several models that hold common functionality and behave similarly to
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2020-02-25 09:09:10 +00:00
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[Issues](../user/project/issues/index.md). Other examples of "issuables"
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are [Merge Requests](../user/project/merge_requests/index.md) and
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[Epics](../user/group/epics/index.md).
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2019-10-07 06:06:10 +00:00
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This guide accumulates guidelines on working with such Rails models.
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## Important text fields
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There are max length constraints for the most important text fields for `Issuable`s:
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- `title`: 255 chars
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- `title_html`: 800 chars
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- `description`: 1 megabyte
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- `description_html`: 5 megabytes
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