Why can't I install a basic rails app for my online store?

Shopify Apps

Topic summary

Problem: Cannot get a basic Rails app working with Shopify using the shopify_app gem while trying to keep full control of a Rails site with a shopping cart.

What was tried:

  • Existing Rails app configured per instructions. Logs show POST /login to ShopifyApp::SessionsController#create with shop=timberlore.myshopify.com, repeated “[ShopifyApp | INFO | Shop Not Found] … deduced from user session,” then renders shopify_app/shared/redirect.html.erb and returns 200 OK.
  • Created a new Rails app from scratch and followed directions exactly, but still encounters an error.

Current blocker:

  • A permissions-related error during app install (shown in a screenshot). The author cannot find where to grant the necessary permissions in the Shopify Partners app/dashboard.

Context/terms:

  • shopify_app: Shopify’s Rails engine for OAuth and embedded app scaffolding.
  • Shopify Partners app: Dashboard where app settings and permissions/scopes are managed.

Status: Unresolved. The author is seeking specific guidance/links on how to grant the required permissions to complete installation. An image (screenshot) is central to understanding the exact error message.

Summarized with AI on January 10. AI used: gpt-5.
1

I want to fully control my rails site, but have a shop with a shopping cart. I am planning to use: https://github.com/Shopify/shopify_app

I couldn’t get my existing site to work after following all the instructions, I kept getting:
‘’’
Started POST “/login” for ::1 at 2023-12-14 07:22:17 -0600
Processing by ShopifyApp::SessionsController#create as HTML
Parameters: {“authenticity_token”=>“[FILTERED]”, “shop”=>“timberlore.myshopify.com”}
[ ShopifyApp | INFO | Shop Not Found ] Installed store - timberlore.myshopify.com deduced from user session
[ ShopifyApp | INFO | Shop Not Found ] Installed store - timberlore.myshopify.com deduced from user session
Rendering /home/tim/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/shopify_app-21.8.1/app/views/shopify_app/shared/redirect.html.erb
Rendered /home/tim/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/shopify_app-21.8.1/app/views/shopify_app/shared/redirect.html.erb (Duration: 575.0ms | Allocations: 107159)
Completed 200 OK in 653ms (Views: 576.3ms | ActiveRecord: 0.0ms | Allocations: 175405)
‘’’
so i created a new rails app from scratch and followed the directions exactly. however, I still have this error:

bonhoeffer_0-1702562269674.png
bonhoeffer_0-1702562269674.png1093×809 50.6 KB

I can’t find how to give permissions in the partners app. Getting this to work is only the first step in getting my real application to work.

I greatly appreciate any help getting past this and appreciate any specific links that help me solve my problem.

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