'Why does Rails fails to boot with "Expected to find a manifest file in `app/assets/config/manifest.js` (Sprockets::Railtie::ManifestNeededError)"?
After bundle update my Rails app fails to boot with:
Expected to find a manifest file in `app/assets/config/manifest.js` (Sprockets::Railtie::ManifestNeededError)
Solution 1:[1]
A new major version of sprockets was recently released which is not compatible with the previous version.
Either perform the steps needed to upgrade or pin to version 3.x in Gemfile
gem 'sprockets', '~>3.0'
Solution 2:[2]
Based on the answer here you may be able to solve this with:
mkdir -p app/assets/config && echo '{}' > app/assets/config/manifest.js
And if you need more details, the answer in this thread helpfully points to the Guide to upgrading from Sprockets 3.x to 4.x
Solution 3:[3]
As suggested by link http://www.redmine.org/boards/2/topics/58169, it is a known issue. See #32223 and sprockets 4.0.0 breaks Redmine 3.4.11 with Ruby <2.5.0.
I just reproduced this issue with redmine 3.4.4, but found everything is ok with Redmine 3.4.12.
Sources
This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.
Source: Stack Overflow
| Solution | Source |
|---|---|
| Solution 1 | Jason Aller |
| Solution 2 | mayatron |
| Solution 3 | Henry Li |