How to Access Custom Data in Goroutines with Type Interface {}?

Accessing Custom Data in Goroutine with Type Interface {}

In some scenarios, you may encounter a situation where you need to access data passed as an anonymous struct to a goroutine running a scheduled job using gojob. However, accessing its fields directly results in the error "type interface {} is interface with no methods."

To resolve this issue, you must explicitly typecast the interface{} custom data to the correct type before accessing its fields. Here's how you can modify your code:

<code class="go">func NewJob(t string, name string, c func(), v interface{}) {
    ...
    jobs = append(jobs, job)
}</code>

<code class="go">func Custom(name string) interface{} {
    ...
    return jobs[i].custom
}</code>

Now, within the scheduled goroutine, you can access the anonymous struct's field by typecasting it:

<code class="go">id := v.(struct{Id int}).Id</code>

This explicit type assertion ensures that you can access the Id field without encountering the "undefined" error.

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