Set the default value of a slice to a null pointer

[1067088037]

User {
    Links []string `json:"links,default="`
}

This is a API file. How to set the default value of this slice to a null pointer? I tried setting it to nil but it didn't work.

[POABOB]

If you want to set the field value to null when there are no links in the JSON payload.

Please try to use a pointer as shown below:

User {
    Links *[]string `json:"links,optional"`
}

reference: https://go-zero.dev/en/docs/tutorials/api/parameter

[1067088037]

I tried it but got an error. Error: user.api line 84:22 mismatched input '[' expecting ID

It's valid to write it this way.

User {
    Links []string `json:"links,optional"`
}

[POABOB]

Sorry, it seems that api file doesn't support pointer type of slice data. Why you want a null pointer value not a empty slice?