Delete field like how firestore allows it using deleteField

[faizanabidnaqvi]

Hi there!

I have this requirement to completely delete some fields from a doc, rather than setting them to null. Firestore provides a 'deleteField()' sentinel that we set on a field which then gets deleted.

In v1, I used this frequently across custom fields and in callbacks where I would mutate the particular field in values using: value["field"] = deleteField()

This way worked to delete the field in v1. In v2, however, this way doesn't work anymore and it instead results in adding another field under that field like: field._methodName: "deleteField"

I understand this could be due to how Firecms handles the values before updating. Is there a way to completely delete a field in firecms or any workaround? If not, is there a plan to add such a functionality?

For now, I am thinking of directly calling Firestore in the callbacks to delete the fields I don't want.

[faizanabidnaqvi]

Looking into the code for firestore data source, seems like setting a field to 'undefined' deletes it so I will do that!

[muhamed-didovic]

@faizanabidnaqvi , thanks for the heads up, I have an array of objects, and deleting property in objects gives me this error: FirebaseError: Function setDoc() called with invalid data. deleteField() is not currently supported inside arrays

Any workaround for this also does it still work in your case when deleting fields?

[faizanabidnaqvi]

Hi @muhamed-didovic Firebase doesn't allow calling deleteField() in arrays and firecms replaces 'undefined' fields with deleteField(); so I guess the only possible solution is to replace the entire array which can be done through firecms anyway (using the array field).

Even if we were directly using firebase sdk directly, array fields are supposed to be replaced entirely if we wish to change any element in the array.