Print Tool: BuildSpecModel.getStylingRules - Uncaught TypeError: t.reduce is not a function

sollte styleAttr mit dem Wert "styleId" gesetzt werden, so kommt es im Anschluss beim Aufruf der reduce() Methoden zum Fehler, da styleAttr kein Array ist. https://bitbucket.org/geowerkstatt-hamburg/masterportal/src/dev/src/modules/tools/print/utils/buildSpec.js

masterportal.js:185 Uncaught TypeError: t.reduce is not a function at t.getStylingRules (masterportal.js:185:350386) at masterportal.js:185:344132

getStylingRules: function (layer, feature, styleAttributes, style) {
        const layerModel = Radio.request("ModelList", "getModelByAttributes", {id: layer.get("id")}),
            styleAttr = feature.get("styleId") ? "styleId" : styleAttributes;

Reproduziert werden kann dies auffälligerweise Wenn Zeichnungen gedruckt werden sollen.

  /**
     * Returns the rules for styling of a feature
     *
     * @param {ol.Feature} layer -
     * @param {ol.Feature} feature -
     * @param {String[]} styleAttributes The attribute by whose value the feature is styled.
     * @param {ol.style.Style} style style
     * @returns {string} an ECQL Expression
     */
    getStylingRules: function (layer, feature, styleAttributes, style) {
        const layerModel = Radio.request("ModelList", "getModelByAttributes", {id: layer.get("id")}),
            styleAttr = feature.get("styleId") ? ["styleId"] : styleAttributes;
        let styleModel,
            labelField,
            labelValue;

        console.log(styleAttr);

        if (styleAttr.length === 1 && styleAttr[0] === "") {
            if (feature.get("features") && feature.get("features").length === 1) {
                const singleFeature = new Feature({
                    properties: feature.get("features")[0].getProperties(),
                    geometry: feature.get("features")[0].getGeometry()
                });

                feature.get("features")[0] = singleFeature;
                if (style.getImage().getSrc().indexOf("data:image/svg+xml;charset=utf-8") === 0) {
                    singleFeature.setId("first_svg_" + singleFeature.ol_uid);
                }
                else {
                    singleFeature.setId("second_png_" + singleFeature.ol_uid);
                }
                singleFeature.set(singleFeature.getId(), String(feature.get("features").length));
                return "[" + singleFeature.getId() + "='" + String(feature.get("features").length) + "']";

            }
            if (feature.get("features") !== undefined) {
                if (style !== undefined && style.getText().getText() !== undefined) {
                    feature.set("sensorClusterStyle", feature.get("features")[0].ol_uid + "_" + String(style.getText().getText()));
                    return "[sensorClusterStyle='" + feature.get("features")[0].ol_uid + "_" + String(style.getText().getText()) + "']";
                }
            }

            return "*";
        }
        // cluster feature with geometry style
        if (feature.get("features") !== undefined) {
            if ((style !== undefined && style.getText().getText() !== undefined) || feature.get("features").length > 1) {
                const value = feature.get("features")[0].get(styleAttr[0])
                    + "_"
                    + style !== undefined && style.getText().getText() !== undefined ? style.getText().getText() : "cluster";

                feature.set(styleAttr[0], value);
                return `[${styleAttr[0]}='${value}']`;

            }

            // Current feature is not clustered but a single feature in a clustered layer
            return styleAttr.reduce((acc, curr) => {
                const value = feature.get("features")[0].get(curr);

                feature.set(curr, value);
                return acc + `${curr}='${value}',`;
            }, "[").slice(0, -1) + "]";
        }
        // feature with geometry style and label style
        if (layerModel !== undefined && Radio.request("StyleList", "returnModelById", layerModel.get("styleId")) !== undefined) {
            styleModel = Radio.request("StyleList", "returnModelById", layerModel.get("styleId"));

            if (styleModel !== undefined && styleModel.get("labelField") && styleModel.get("labelField").length > 0) {
                labelField = styleModel.get("labelField");
                labelValue = feature.get(labelField);
                return styleAttr.reduce((acc, curr) => acc + `${curr}='${feature.get(curr)}' AND ${labelField}='${labelValue}',`, "[").slice(0, -1)
                    + "]";
            }
        }
        // feature with geometry style
        return styleAttr.reduce((acc, curr) => acc + `${curr}='${feature.get(curr)}',`, "[").slice(0, -1)
            + "]";
    },

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