500 internal server error trying to install Shopify app

Question

This is my app: https://dialective-shopify.herokuapp.com

It gets installed with no problems in development mode.

It gets installed in production mode BUT ONLY if I read a few products from the development shop:

@products = ShopifyAPI::Product.find(:all, :params => {:limit => 10})

If I try to read 50 products:

    @products = ShopifyAPI::Product.find(:all, :params => {:limit => 50})

and reinstall the app from scratch in the dev shop, then I get a 500 server error:

A static HTML page can contain a simple dependency free script to set the top bar to a 500 server error. This page can be found in 'public/500.html'.

in the following GET request:

with header:

This happens after giving the authorization for installing the app as well as for the TEST payment.

If I refresh the page pressing F5 several times, eventually the installation process successfully finishes and the app gets loaded!

I don't even know where to start looking since the error is on the server side (presumably on Shopify's servers) and I can't reproduce it in development mode.

Any ideas?

Answer 1

A 500 error is your problem, not Shopify's. You need to examine your logs in heroku where you'll probably find your problem very quickly in the stack trace provided.