Nested query fails. Issue with Mapping?

[thitami]

I am quite new to ES and am using the sleimanx2/plastic package to integrate it with my app.

I have got the following models:

Record and Contributor

In Record model:

/**
     * @return \Illuminate\Database\Eloquent\Relations\BelongsToMany
     */
    public function contributors()
    {
        return $this->belongsToMany(Contributor::class, 'contributor_record', 'record_id', 'contributor_id');
    }

In Contributor model I have got the following relationship:

 /**
     * @return \Illuminate\Database\Eloquent\Relations\BelongsToMany
     */
    public function records()
    {
        return $this->belongsToMany(Record::class, 'contributor_record', 'contributor_id', 'record_id');
    }

Issue is that when I am trying to search against the contributor's name property I am getting the exception:

{"error":{"root_cause":[{"type":"query_shard_exception","reason":"failed to create query: {\n \"nested\" : {\n \"query\" : {\n \"match\" : {\n \"contributors.name\" : {\n \"query\" : \" * Int * \",\n \"operator\" : \"OR\",\n \"prefix_length\" : 0,\n \"max_expansions\" : 50,\n \"fuzzy_transpositions\" : true,\n \"lenient\" : false,\n \"zero_terms_query\" : \"NONE\",\n 

The code I am using to query the contributor's name is:

return $this->record->search()->nested('contributors', function (SearchBuilder $builder) use ($searchTerm) {
            $builder->match('contributors.name', ' * '.$searchTerm.' * ');
        })->size(500)->get()->hits();

Would you consider this a Mapping issue?