chunk fails if there's query scope

[zoul0813]

chunk calls getAll in a loop, which is currently calling applyScopes. Since chunk does not create a new query with each loop, the previous scope functions are appended to the current query. With a basic model that has a single scope attached, chunk fails on the 301st call as FilterExpression has a limit of 300 expressions.

A "quick fix" for this is to add an additional parameter to getAll that determines whether or not to call applyScopes.

    protected function getAll($columns = [], $limit = -1, $use_iterator = true, $apply_scopes = true)
    {
        if($apply_scopes) $this->applyScopes();
        // ... trimmed
    }

Then modify chunk

    public function chunk($chunk_size, callable $callback)
    {
        $this->applyScopes();
        while (true) {
            $results = $this->getAll([], $chunk_size, false, false);

            call_user_func($callback, $results);

            if (empty($this->lastEvaluatedKey)) {
                break;
            }
        }
    }

[baopham]

Could you update the title to: chunk fails if there's query scope