You cannot user Where filter with a different name vs column.

[bbrala]

When configuring a filter as follows:

Where::make('modified_since', 'updated_at')->using('>='),

The generator breaks, it tries to get example data from the name of the filter, ignoring the column.

[bbrala]

We could do something very ugly in the Where::filter

/** @var \Illuminate\Database\Eloquent\Builder $builder */
        $builder = $this->route->schema()::model()::query();
        $query = $builder->getQuery();
        $probableColumn = $builder->qualifyColumn($key);
        $this->filter->apply($builder, 'appliedWhere');

        foreach($builder->getQuery()->wheres as $where) {
          if ($where['value'] === 'appliedWhere' && $where['column'] !== $probableColumn) {
            $column = $where['column'];
          }
        }

But perhaps its just better to make sure there is no empty ecamples:

 $examples = collect($this->generator->resources()
          ->resources($this->route->schema()::model()))
          ->pluck($column)
          ->filter()
          ->map(function ($f) {
              // @todo Watch out for ids?
                 return Example::create($f)->value($f);
          })
          ->toArray();

This also applies to other filters with the following signature public static function make(string $name, string $column = null).

[bbrala]

The related pull request (laravel-json-api/eloquent#18) has been merged, the methods are now public and part of the trait "Conceirns\HasColum". This means we can sniff this out and ask for the column name, fixing this bug :)

[captnCC]

Very nice, gonna implement it in the next days!