Be careful and detect type invalid types

2018-05-28 17:36:58 +02:00
parent 34a2f3b32b
commit 8a1d5d3a48
1 changed files with 5 additions and 2 deletions
@@ -92,10 +92,13 @@ function columnSelector(columns) {
    if (!columns) {
        return '*';
    }
-    if (typeof(columns) === 'string') {
+    if (typeof columns === 'string') {
        return columns;
    }
-    return columns.map(name => `"${name}"`).join(', ');
+    if (Array.isArray(columns)) {
+        return columns.map(name => `"${name}"`).join(', ');
+    }
+    throw new TypeError(`Bad argument type for columns: ${typeof columns}`);
 }

 module.exports.getQuerySample = function(query, sampleProb, limit = null, randomSeed = 0.5, columns = null) {