Add/Modify a field in `afterChange` collection Hook

loaialsharee

2 months ago

3

hooks: {
    afterChange: [
      async (data) => {

        data.doc.new_field = 'test'        // adding a new field => doesn't work
        data.doc.existing_field = 'test'   // works locally but value is not reflected in db 
        
        console.log(data);
      },
    ],
  },

• 

  notchr

  2 months ago

  @loaialsharee Does it have to be done in the afterChange hook?

  
  

  
  

  Also, I notice you're not returning the doc in the afterChange hook

• 

  loaialsharee

  2 months ago

  @notchr Thank you for your insight! It seems that I need to add the

  new_field

  to the collection fields first to be able to reflect on both db and API from the hooks. It appears that it doesn't create a field on the fly.

  
  
  

  For the existing fields (like the ones attached with the image upload field once linked with Media collection by default), I guess modifying them is not possible.

• 

  jarrod_not_jared

  Payload Team

  2 months ago

  - Adding fields on the fly is not possible. Payload is code first, so adding the field to your collection fields is the way to go

  
  

  - You can modify fields, but you are likely looking for a beforeChange hook, afterChange is too late, the data has already been saved in the DB