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javascriptnode.jsmodelloopbackjs

Automatically insert createdAt and updatedAt properties for a model in loopback

I have a persisted model in my loopback app and I want to automatically add createdAt and updatedAt attributes for this model instances accordingly. What is the easy way to achieve this?

Solution

  • In loopback 3 I have figured a great way to insert createdAt and updatedAt for a model using a mixin. The mixin name is loopback-ds-timestamp-mixin and you can install its module using the command

     npm i loopback-ds-timestamp-mixin --save

    Then you can add the mixin in the mixins property found in server/model-config.json as the following

    "mixins": [
  "loopback/common/mixins",
  "../node_modules/loopback-ds-timestamp-mixin",
  "../common/mixins"
]

    Finally, you can insert createdAt and updatedAt for a model by specifying

    "Timestamp": true

    in the mixins property of the model json file.

    You can also get more details about this mixin here.