Laravel Legends Eloquent Filter

A useful library to make filters for Eloquent.

This library is useful to create search filters in your Rest API using the Eloquent.

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Description

The Eloquent Filter library can be used to create patterns for search criterias on models in your Laravel Project. The idea is aggregate filters simply passing the values in your request payload.

Instalation

For instalation, you should be use Composer. Run the follow command:

composer require laravellegends/eloquent-filter

Usage guide

The LaravelLegends\EloquentFilter\Concerns\HasFilter trait can be used in models that will be apply the search filters.

use LaravelLegends\EloquentFilter\Concerns\HasFilter;

class User extends Model
{
    use HasFilter;
}

The HasFilter trait provides the filter and withFilter methods.

A simple way to use this library in your Laravel application is calling the filter method before get results of your model.

Example:

class UsersController extends Controller 
{
    use App\Models\User;
    
    public function index()
    {
        return User::filter()->paginate();
    }

    // or

    public function index()
    {
        return User::latest('id')->filter()->paginate();
    }

    // or

    public function index(Request $request)
    {
        return User::filter($request)->paginate();
    }
}

You can show the results when call /api/users?exact[id]=1. The sql query "select * from users where (id = 1)" will be applied.

Note: Show the rules session to more information.

Another way, is using the specific filter for a model. You can inherit the ModelFilter class to create a custom filter for a model.

For create this class, you should be use the command php artisan make:filter, as follow example:

$ php artisan make:filter UserFilter

The above command will be generate the follow class:

namespace App\Filters;

use LaravelLegends\EloquentFilter\Filters\ModelFilter;

class UserFilter extends ModelFilter 
{
    public function getFilterables(): array
    {
        return [
            'role_id' => 'not_equal', // or ['not_equal']
            'name'    => ['contains', 'starts_with'],
        ];
    }
}

In Controller

use App\Models\User;
use Illuminate\Http\Request;
use LaravelLegends\EloquentFilter\Filter;

class UsersController extends Controller
{
    // api/users?starts_with[name]=Wallace&not_equal[role_id]=2

    public function index(Request $request)
    {
        return User::withFilter(new UserFilter, $request)
                    ->orderBy('name')
                    ->get();
    }
}

The above code internally will be called as follow example:

User::where(function ($query) {
    $query->where('name', 'LIKE', 'Wallace%');
    $query->where('role_id', '<>', '2');
})
->orderBy('name')
->get();

---

What does it do?

This library internally apply filters based on query string parameters with special keyworks names.

See all paramaters follow:

max

The maximum value of a column. The url api/users?max[field]=100 is like a User::where('field', '<=', 100).

---

min

The minimum value of a column. The url api/users?min[age]=33 is like a User::where('age', '>=', 33).

---

contains

A search term contained in a column. The url api/users?contains[name]=wallace is like a User::where('name', 'LIKE', '%wallace%').

---

ends_with

Search a value according to end content of string. Is similar to a LIKE with %$value value.

---

starts_with

Filter the field when the value starts with a certain value. A url api/users?starts_with[name]=brcontainer Sounds like a User::where('name', 'LIKE', 'brcontainer%').

---

exact

Search by a exact value of the field· A url api/users?exact[email]=teste@teste.com Sounds like a User::where('name', '=', 'teste@teste.com').

---

has

Filter by relationship. You can use the 0 or 1 value.

Example:

The url api/users?has[posts]=1 is like a User::has('posts')

The url api/users?has[posts]=0 is like a User::doesntHave('posts')

---

is_null

Apply WHERE IS NULL or WHERE IS NOT NULL to a query.

Example:

The url api/users?is_null[cpf]=1 is like a User::whereNull('cpf')

The url api/users?is_null[age]=0 is like a User::whereNotNull('age')

---

not_in

Searchs when a column NOT HAS the passed values.

Example:

A url api/users?not_in[role][]=1&not_in[role][]=2 é equivalente à User::whereNotIn('role', [1, 2])

Note: When the not_in[my_field] is a empty array, no action will be taken.

---

in

Searchs when a column HAS the passed values.

Example:

The url api/users?in[role][]=10&in[role][]=20 sounds like a User::whereIn('role', [10, 20])

NOTE: When the in[my_field] is a empty array, no action will be taken.

---

date_max

Search by a maximium value of a date field.

A url api/users?date_max[created_at]=2021-01-01 sounds like a User::whereDate('created_at', '<=', '2021-01-01')

---

date_min

Search by a minimun value of a date field.

Example:

A url api/users?date_min[created_at]=2021-01-01 sounds like a User::whereDate('created_at', '>=', '2021-01-01')

---

not_equal

Search by not equal value passed. If you use in related field, the whereDoesntHave will be applied applied.

Example:

The url api/users?not_equal[profile_id]=3 sounds like a

User::where('profile_id', '<>', '3');

The url api/users?not_equal[roles.id]=1 sounds like a

User::whereDoesntHave('roles', fn ($query) => $query->where('id', '=', 3));

---

year_max

The url api/users?year_max[created_at]=2000 sounds like a

User::whereYear('created_at', '<=', 2000);

---

year_min

The url api/users?year_min[created_at]=1998 sounds like a

User::whereYear('created_at', '>=', 1998);

---

year_exact

The url api/users?year_exact[created_at]=1998 sounds like a

User::whereYear('created_at', '=', 1998);

---

Filtering relationship fields

You can apply the search filters in the relatioship methods defined in your model.

For example:

Model:

class User extends Model
{
    use HasFilter;

    public function phones()
    {
        return $this->hasMany(Phone::class, 'user_id');
    }
}

Filters:

class UserFilter extends ModelFilter
{
    public function getFilterables(): array
    {
        return [
            'id'            => ['exact', 'not_equal'],
            'created_at'    => ['year_exact', 'date_max', 'date_min'],
            'phones.number' => ['contains'],
            // or
            'phones'        => new PhoneFilter,
        ];
    }
}

class PhoneFilter extends ModelFilter
{

    public function getFilterables(): array
    {
        return [
            'number' => 'contains'
        ];
    }
}

class UserController extends Controller
{
    public function index()
    {
        // api/users?not_in[role_id][]=1&not_in[role_id][]=3
        
        // select * from users where (role_id NOT IN (1, 3))

        return User::withFilter(new UserFilter)->paginate();
    }

    // Or, apply filter as nested query

    public function index() 
    {

        // api/users?exact[role_id]=1
        
        // select * from users where (role_id = 1)

        return User::where(UserFilter::toClosure())->paginate();
    }

    // Or apply in your query as base condition

    public function index()
    {
        
        // api/users?exact[role_id]=1
        
        // select * from users where role_id = 1

        return User::tap(UserFilter::toClosure())->paginate();
    }
}

In the following example, the user will be filtered for the related phone containing the value 55.

The api/users?exact[phones.number]=55 is like to:

User::where(function ($query) {
    $query->whereHas('phones', function ($query) {
        $query->where('number', '=', '55');
    });
})->paginate();

Axios examples

If you use axios library, you can use the params options to include the above filters.

Example:

const api = axios.create({
    baseURL: 'http://localhost:8000/api'
});

api.get('users', {
    params: { 
        'in[role]' : [1, 2, 3],
        'contains[name]' : 'Maxters',
        'is_null[name]' : 0
    }
})