selectpicker directive

maybe someone can tell me why the `selectpicker` directive is not working with data from ajax?

I have set of data thats pulled from database via http, and load it to `select option`, but it seems it does not load it to the `select option` that has `selectpicker` in it, while i am pretty sure thats the data is there (removed the `selectpicker` directive and the data loaded to the `select option`). However by removing the directive, the `select option` does not has the style and the function such is live search, its just an usual `select option`

**Not Working**

```

```

**Working**

```

```