Utilities for Seneca entities.

• rtag: random revision tags generated per save; provides support for complex object caching.
• archive: archival of deleted entities.
• when: injection of created and modified time stamps
• duration: injection of entity action duration times in results as meta data

$ npm install seneca-entity-util seneca-promisify

• rtag : object
• when : object
• duration : object
• archive : object
• derive : object
• errors : object
• init$ : boolean

• role:cache,resolve:rtag
• role:cache,stats:rtag
• sys:entity,cmd:list
• sys:entity,cmd:load
• sys:entity,cmd:remove
• sys:entity,cmd:save
• sys:entity,derive:add
• sys:entity,derive:list

Use rtag to load cached version of expensive result.

• space : string " "
• key : string " "
• rtag : string " "
• resolver : function " "

Get rtag cache usage statistics.

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Override sys:entity,cmd:save to apply utilities.

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