Fix 203 (#204)

* Handle case where no column headers are present.

As reported in #203, there are use cases where the CSV may not have
column headers for a particular set of data. In this case, the expected
output simply ignores these unnamed data values, but as of doc-path@2.0.0,
the output was an error indicating that no key path was provided. This
commit fixes #203 by capturing and handling that error from the doc-path
module.

Fixes #203

* chore(release): 3.14.2

Author: mrodrig

lib/csv2json.js

@@ -290,8 +290,13 @@ const Csv2Json = function(options) {
             // If there is a value at the key's index in the line, set the value; otherwise null
             let value = retrieveRecordValueFromLine(line, key);
 
-            // Otherwise add the key and value to the document
-            return path.setPath(document, key.value, value);
+            try {
+                // Otherwise add the key and value to the document
+                return path.setPath(document, key.value, value);
+            } catch (error) {
+                // Catch any errors where key paths are null or '' and continue
+                return document;
+            }
         }, {});
     }
 

package-lock.json

@@ -5,7 +5,7 @@
     },
     "name": "json-2-csv",
     "description": "A JSON to CSV and CSV to JSON converter that natively supports sub-documents and auto-generates the CSV heading.",
-    "version": "3.14.1",
+    "version": "3.14.2",
     "homepage": "https://mrodrig.github.io/json-2-csv",
     "repository": {
         "type": "git",

package.json

@@ -43,7 +43,8 @@ const fs = require('fs'),
         {key: 'nativeMapMethod', file: '../data/csv/nativeMapMethod.csv'},
         {key: 'nestedDotKeys', file: '../data/csv/nestedDotKeys.csv'},
         {key: 'nestedDotKeysWithArray', file: '../data/csv/nestedDotKeysWithArray.csv'},
-        {key: 'nestedDotKeysWithArrayExpandedUnwound', file: '../data/csv/nestedDotKeysWithArrayExpandedUnwound.csv'}
+        {key: 'nestedDotKeysWithArrayExpandedUnwound', file: '../data/csv/nestedDotKeysWithArrayExpandedUnwound.csv'},
+        {key: 'emptyColumns', file: '../data/csv/emptyColumns.csv'}
     ];
 
 function readCsvFile(filePath) {

test/config/testCsvFilesList.js

@@ -33,5 +33,6 @@ module.exports = {
     nativeMapMethod: require('../data/json/nativeMapMethod.json'),
     nestedDotKeys: require('../data/json/nestedDotKeys.json'),
     nestedDotKeysWithArray: require('../data/json/nestedDotKeysWithArray.json'),
-    nestedDotKeysWithArrayExpandedUnwound: require('../data/json/nestedDotKeysWithArrayExpandedUnwound.json')
+    nestedDotKeysWithArrayExpandedUnwound: require('../data/json/nestedDotKeysWithArrayExpandedUnwound.json'),
+    emptyColumns: require('../data/json/emptyColumns.json')
 };

test/config/testJsonFilesList.js

@@ -225,6 +225,14 @@ function runTests(jsonTestData, csvTestData) {
                     done();
                 });
             });
+
+            it('should drop any values with empty column headers', (done) => {
+                converter.csv2json(csvTestData.emptyColumns, (err, json) => {
+                    if (err) done(err);
+                    json.should.deepEqual(jsonTestData.emptyColumns);
+                    done();
+                });
+            });
         });
 
         describe('Error Handling', () => {

test/csv2json.js

@@ -0,0 +1,3 @@
+test,test2,,
+data1,data2,blah,blah
+data3,data4,blah2,blah2

test/data/csv/emptyColumns.csv

@@ -0,0 +1,4 @@
+[
+    { "test": "data1", "test2": "data2" },
+    { "test": "data3", "test2": "data4" }
+]