fix boolean false value to empty string

index.js

@@ -26,12 +26,12 @@ module.exports = function *(options) {
       var tmpField = field.split('.');
       var tmpValue = '';
       if (tmpField.length === 1) {
-        tmpValue = item[field] || '';
+        tmpValue = item[field] === undefined || item[field] === null ? '' : item[field];
       } else {
         tmpValue = item;
         var n = 0;
         while (n < tmpField.length) {
-          tmpValue = tmpValue[tmpField[n]] || '';
+          tmpValue = tmpValue[tmpField[n]] === undefined || tmpValue[tmpField[n]] === null ? '' : tmpValue[tmpField[n]];
           if (!tmpValue) {
             break;
           }

test.js

@@ -78,5 +78,46 @@ describe('json to csv test with incorrect input', function () {
     var csv = yield json2csv(options);
     csv.should.to.have.string(',,,\n');
   });
+});
+
+describe('validate boolean inpunt', function () {
+  it('mix boolean value', function * () {
+    var data = [{
+      hello: true,
+      world: false
+    }];
+    var options = {
+      data: data,
+      fields: ['hello', 'world']
+    };
+    var csv = yield json2csv(options);
+    csv.should.to.have.string('true,false');
+  });
+
+  it('all true boolean value', function * () {
+    var data = [{
+      hello: true,
+      world: true
+    }];
+    var options = {
+      data: data,
+      fields: ['hello', 'world']
+    };
+    var csv = yield json2csv(options);
+    csv.should.to.have.string('true,true');
+  });
+
+  it('all false boolean value', function * () {
+    var data = [{
+      hello: false,
+      world: false
+    }];
+    var options = {
+      data: data,
+      fields: ['hello', 'world']
+    };
+    var csv = yield json2csv(options);
+    csv.should.to.have.string('false,false');
+  });
 
 });