Dashboard graph has broken y-axis range

[tomasinchoo]

Y-axis on dashboard graph always shows range 0 to 100 in steps of 10. That means quantity and amounts do not match actual value in graph.

Preconditions

1. Any working setup for Magento 2
2. Tested on 2.1.1, but it probably doesn't work in any other

Steps to reproduce

1. Make few orders and look at the graph in admin dashboard

Expected result

1. Values shown should be matched with y-axis value

Actual result

1. It always show range 10 to 100 in steps of 10 and values (qty and amounts) doesn't make sense with that values

Fortunately, that issue is easy to fix:
This code (exists in M1, not in M2) needs to be inserted on line 424 in vendor/magento/module-backend/Block/Dashboard/Graph.php (thanks to @ivanweiler)

                } else if ($idx == 'y') {
                    $valueBuffer[] = $indexid . ":|" . implode('|', $yLabels);   

[bardkalbakk]

What's the status on this bug? Still an issue in 2.1.5 believe.

[sennin32]

2.1.6 still has the same issue.

[veloraven]

Internal ticket was created - MAGETWO-69966

[Silarn]

Here's a plugin solution for this issue until the official fix:

    public function __construct(
        \Magento\Backend\Helper\Dashboard\Data $dashboardData,
        \Magento\Framework\UrlInterface $url
    )
    {
        $this->_dashboardData = $dashboardData;
        $this->_urlBuilder = $url;
    }
    public function aroundGetChartUrl(\Magento\Backend\Block\Dashboard\Graph $graph, \Closure $proceed, $directUrl = true)
    {
        $query = $proceed();
        $series = $graph->getAllSeries();
        $localmaxvalue = [0];
        $localminvalue = [0];
        foreach ($series as $index => $serie) {
            $localmaxvalue[$index] = max($serie);
            $localminvalue[$index] = min($serie);
        }
        $maxvalue = max($localmaxvalue);
        $minvalue = min($localminvalue);
        $miny = 0;
        $maxy = 0;
        if ($minvalue >= 0 && $maxvalue >= 0) {
            if ($maxvalue > 10) {
                $p = pow(10, $this->_getPow($maxvalue));
                $maxy = ceil($maxvalue / $p) * $p;
            } else {
                $maxy = ceil($maxvalue + 1);
            }
        }
        $params = array('chxr' => "1,$miny,$maxy");
        // return the encoded data
        if ($directUrl) {
            return $query.'&chxr='.$params['chxr'];
        } else {
            $parts = parse_url($query);
            parse_str($parts['query'], $parsedParams);
            $params = array_merge($params, $parsedParams);
            $gaData = urlencode(base64_encode(json_encode($params)));
            $gaHash = $this->_dashboardData->getChartDataHash($gaData);
            $params = ['ga' => $gaData, 'h' => $gaHash];
            return $this->_urlBuilder->getUrl('adminhtml/*/tunnel', ['_query' => $params]);
        }
    }
    protected function _getPow($number)
    {
        $pow = 0;
        while ($number >= 10) {
            $number = $number / 10;
            $pow++;
        }
        return $pow;
    }

(Also thanks in part to @thaisatservermonkey)

[magento-engcom-team]

@tomasinchoo, thank you for your report.
We've created internal ticket(s) MAGETWO-69966 to track progress on the issue.