Heroku crashing with Rails 5 rc1

问题

I have upgraded from rails 4 to 5. Great. Added Foundation 6 topbar, pushed to heroku. Nothing failed but website not loading. heroku run logs showed this:

<div class="title-bar" data-responsive-toggle="example-menu" data-hide-for="medium">
  <button class="menu-icon" type="button" data-toggle></button>
  <div class="title-bar-title">
    <%= image_tag("o-section/mascot.svg") %>
  </div>
</div>

The error was:

ActionView::Template::Error (Unexpected token punc «(», expected punc «:» (line: 23041, col: 10, pos: 685332) error

Is there an issue here?

回答1:

Let me close this. I can't explain why this works or used to work before adding a new image but...it works.

Looking back at the error, it was relating to a javascript function. I do not know what or where is line: 23041 but I guess that is from a compiled file. So for a long story short, all my js functions looked something like this:

foo() {
 ...
}

I then wondered, what if I changed all to a "vanilla js function".:

foo: function() {
 ...
}

So basically the clue was expected punc «:» in which it wanted foo: function(){...}

After that, I rake asset:precompile and all was well.

回答2:

Your error says it does not expect a ( and expects a : instead.

Try replacing:

<%= image_tag("o-section/mascot.svg") %>

with:

<%= image_tag: "o-section/mascot.svg" %>

来源：https://stackoverflow.com/questions/37230740/heroku-crashing-with-rails-5-rc1