Custom field implementation

[thangchung]

Just like

• https://getcockpit.com/documentation/modules/collections
• https://www.advancedcustomfields.com/resources/creating-a-field-group/
• https://www.slideshare.net/leocaseiro/wordpress-advanced-custom-fields-101

We have a demo at http://demo.fatfreecrm.com/admin/fields

[thangchung]

The basic idea that works https://developer.atlassian.com/jiradev/jira-platform/jira-architecture/database-schema/database-custom-fields
https://metabox.io/optimizing-database-custom-fields/