Global Filters

purity validates allowed filters in the following order of priority:

• Filters specified in the filters configuration in the configs/purity.php file.

// configs/purity.php
'filters' => [
  EqualFilter::class,
  InFilter::class,
],

• Filters declared in the $filters variable in the model.

note that $filters will overwrite config filters.

// App\Models\Post

private array $filters = [
  '$eq',
  '$in',
];
    
// or
    
private array $filters = [
  EqualFilter::class,
  InFilter::class,
];

• Filters passed as an array to the filterBy() function.

note that, filterBy will overwrite all other defined filters.

Post::filterBy('$eq', '$in')->filter()->get();
// or
Post::filterBy(EqualFilter::class, InFilter::class)->filter()->get();

Restrict by Field

There are three available Methods for your convenience. They take priority respectively.

• Method 1: Define restricted filters inside $filterFields property, as shown below

$filterFields = [
  'title' => ['$eq'],  // title will be limited to the eq operator
  'title' => '$eq',    // works only for one restricted operator
  'title:$eq',         // same as above
  'title',             // this won't be restricted to any operator
];

The drawback here is that you have to define all the allowed fields, regardless of any restriction fields.

• Method 2: Define them inside $restrictedFilters property

$restrictedFields = [
  'title' => ['$eq', '$eq'],  // title will be limited to the eq operator
  'title:$eq,$in'             // same as above
  'title'                     // this won't be restricted to any operator
];

• Method 3: Finally, you can set it on the Eloquent builder, which takes the highest priority (overwrite all the above options)

Post::restrictedFilters(['title' => ['$eq']])->filter()->get();

WARNING

All field-restricted filter operations are respected to filters defined in $filter in the model. This means you are not allowed to restrict a field operation not permitted in restricted fields.

$filters = ['$eq'];
$restrictedFilters = ['title' => ['$eqc']] // This won't work