Custom error messages not displayed in Lightning Experience when uploading files
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Known Issues · In Review

Custom error messages not displayed in Lightning Experience when uploading files

Apex , Content and Files , Summer 17

Last updated 8 days ago ·Reference W-4807698 ·Reported By 145 users

In Review

Summary
Server error messages (added via addError() for instance) are not displayed in various scenarios (e.g. file upload) in Lightning Experience. They are displayed as expected in Classic.

Repro
1) Create an Apex trigger named 'AttachmentTriggerForInsert' on ContentDocumentLink object as following:
---
trigger AttachmentTriggerForInsert on ContentDocumentLink (after Insert) {
for(ContentDocumentLink obj : Trigger.new){
obj.addError('Test message! You can not upload the file!!!');
}
}
---

2) Switch to Lightnig Experience if necessary
3) Go to "Files" tab
4) Click "Upload Files" button and choose any file to attach.

You will see "Can't upload [Your uploaded file name]." error message instead of seeing 'Test message! You can not upload the file!!!' set in 'AttachmentTriggerForInsert' Apex Trigger. Note this message is below the uploader progress bar.

In Classic, the custom error message is expected.

Workaround
If the org has some record types on ContentVersion, errors will be displayed in the "Add File Details" panel, where the user will see "Enter details on next page", instead of "Can't upload file".

Updates
Multiple file uploads were introduced in Summer '17 (https://releasenotes.docs.salesforce.com/en-us/summer17/release-notes/rn_files_related_list_drag.htm). This functionality is available in the following scenarios:

1. [Desktop only] Files home
2. [Desktop only] Files/Notes and Attachments related list
3. [Desktop and Mobile] lightning:fileUploader component

In these places, the component returns a hard coded error message (i.e. "Can't upload") instead of a custom error message set for instance via addError().

Reported By (145)

Feizhou Li divya choksey Huijin Jo Phil Hirons Eddie Wong Andres cruz Shruti Nagrale Ekta Gupta Małgorzata Witkowska Roman Skrzynski Muhammad Tounsi Christine Miller Mauro Santiago Coronado Vela Rohit Tripathi Sumant Pandey Sweta sweta William Garcia Aswinkumar Pasupathi Jeff Kranz Nadina D. Lisbon Bhawani Sharma Kranthikumar Polimera Adrian Castellanos Gutierrez Mahmood Ashraf Taras Buchynskyi Dariusz Saflik Ryan Petersen Oleg Grishan Jana Lena Deufel Sridhar S Jake Richter Kristopher Veraces Logesh Rengarajan Davis Handler Christine Gelb Samy Saied David Zheng Jayant Meshram Angelina Muddamalle Luis Guilherme Marques Lino Bill Anderson Anil Kumar Devunoori Rob Craven Roman Dovbush Palak Patel Nikita Lakhotia Duygu Alan Christian Perseke Meena Kumar Khrisna Elumba Kelvin Wu Konstantinos Mantos jegadeesh gr Salesforce Admin Everis Admin eadmin Bala Gangadhar Vadlamuri Jon Astemborski Kim Williams Alissa Nuttall Amol Bhalerao Nitheesh Kurapati Shaun Vallejo Anil Malneni Manali Joshi Ann Kristin Olsen Bee Vang Ramadevi Pesala Amanda Story Robinson Subhani Pothakamuri Tony White Jai Jordan Kranthi Nirmala Bob Hatcher John Hughes Michael Harris Jenny Frazier Bob Hatcher Jesse Kovach Michael Olson Aslam Iqbal Anuvit Vilaskhamphir Jack Holt Fernando Glingani Ben Gersbach Roman Trofimuk Bruno Martín López Alfredo Escobedo Shiva Koushik Rachapudi Jean-Philippe Hallot Maria Sesé Fei Zhang Jacopo Flore 雄 陳 Kunal Singh Gusain Ondřej Kolenatý Vojtech Franek Tom Kortan Pavel Krusina Sindhu V Spencer Kubat Swapna Konduru Scott Divish Luis Ferreira Karin Wilbricht Surjit Singh Starrdata Admin Mark Hempen vikas patel Julian Azzam Krupananda Reddy Maneri Alessandro Lapucci Caleb Grundmeier Nehal Jain Gajendra Kumar Rathish Rajendran Amitabh Misro Christopher Larson German Mejias Kevin Johnson Glenn Coppens Amit Kumar Qazi Sarmad Dave Ries Anastasiya Alekseeva Sridhar Mediga Cándido Parejo Casado D Modrzejewska Vivek Kumar Holly KURT Raja Bhandari Floris Jan Galesloot Astha Bhola Eleonore Fournier Nisha Bhat Elene Sampt Randy Straka Phani Rayavarapu Daniel Ozawa rakesh kumar.saini Abhishek Rawat Ahmed Aberkane Satveer Bhantoo Andrea Borsani Alberto Minardi Admin AT

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