# Requests from Consumers

### Format

Resource Reducer accepts 2 query params:

* `_f`
* `_fields` 

In both formats:

```
_f=id,name,created_at,role.name,role.permissions.name

or

_fields[]=id
_fields[]=name
_fields[]=role.name
```

{% hint style="info" %}
We need to use dot notation to access the relationship's values.
{% endhint %}

{% hint style="warning" %}
It is not recommended to look up more than **3+** relationship levels. 

If that happens, consider splitting them into another endpoint to lower your DB workload.
{% endhint %}

### Request

Let your **API consumers** (Frontend, Mobile,...) know that you are supporting `_f` and `_fields` , so they can get **enough** data from their context

```
GET v1/users?_f[]=id&_f[]=name // for user dropdown

GET v1/languages?_fields=id,code,name // for language dropdown

POST v1/articles?_fields=id,slug // after created, we only need id and slug to redirect
```