- You MUST NOT try and generate a Rails app from scratch on your own by generating each file. For a NEW app you MUST use
rails new
first to generate all of the boilerplate files necessary. - Create an app in the current directory with
rails new .
- Use Tailwind CSS for styling. Use
--css tailwind
as an option on therails new
call to do this automatically. - Use Ruby 3.2+ and Rails 8.0+ practices.
- Use the default Minitest approach for testing, do not use RSpec.
- Default to using SQLite in development.
rails new
will do this automatically but take care if you write any custom SQL that it is SQLite compatible. - An app can be built with a devcontainer such as
rails new myapp --devcontainer
but only do this if requested directly. - Rails apps have a lot of directories to consider, such as app, config, db, etc.
- Adhere to MVC conventions: singular model names (e.g., Product) map to plural tables (products); controllers are plural.
- Guard against incapable browsers accessing controllers with `allo
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// Update globs depending on your framework | |
--- | |
name: tailwind_v4 | |
description: Guide for using Tailwind CSS v4 instead of v3.x | |
globs: ["**/*.{js,ts,jsx,tsx,mdx,css}"] | |
tags: | |
- tailwind | |
- css | |
--- |
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class AttachedValidator < ActiveModel::EachValidator | |
# Active Storage validator to ensure that an attachment is attached. | |
# | |
# usage: | |
# validates :upload, attached: true | |
# | |
def validate_each(record, attribute, _value) | |
return if record.send(attribute).attached? | |
errors_options = {} |
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<%= form_with(model: product) do |form| %> | |
<div> | |
<%= form.label :name %> | |
<%= form.text_field :name, class: "input" %> | |
</div> | |
<div> | |
<%= form.label :categories %> | |
<%= form.collection_select :category_ids, Category.all, :id, :name, {}, {multiple: true, id: 'category-select', class: "dropdown"} %> | |
</div> |
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# ActiveJob natively captures constructor arguments in an `@arguments` instance variable | |
# which is also exposed as an `arguments` property on each job instance. | |
# | |
# Calls to `perform_now` and `perform_later` both forward arguments to the constructor. | |
# | |
# For example, all of these invocation styles work. | |
# | |
# result = DoStuffJob.new("foobar").perform # sync | |
# result = DoStuffJob.new.perform("foobar") # sync | |
# result = DoStuffJob.perform_now("foobar") # sync |
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<!DOCTYPE html> | |
<html> | |
<head> | |
<title>RefresherDemo</title> | |
<%= csrf_meta_tags %> | |
<%= csp_meta_tag %> | |
<%= stylesheet_link_tag "application", "data-turbo-track": "reload" %> | |
<%= javascript_include_tag "application", "data-turbo-track": "reload", defer: true %> | |
</head> |
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<cable-car href="/cc/cable_car" csrf-token="94IkWdvagUHWPGVkD+VeBFVjGoM0zXAf6tgm6BPU+kEpOj2BTtI6bXJQzEDXGAF+R6Dc1ek7oNouatTMrbUy"> | |
<button | |
onclick="this.closest('cable-car').post(this, {extra: 123})" | |
data-x="1" | |
output="#show-the-things" | |
> | |
Do a thing! | |
</button> | |
<section id="show-the-things"></section> |
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/* | |
ERB template chunk from The Feed's display of emails: | |
<section class="postings postings--feed-style" id="postings" | |
data-controller="pagination" data-pagination-root-margin-value="40px"> | |
<%= render partial: "postings/snippet", collection: @page.records, as: :posting, cached: true %> | |
<%= link_to(spinner_tag, url_for(page: @page.next_param), | |
class: "pagination-link", data: { pagination_target: "nextPageLink", preload: @page.first? }) unless @page.last? %> | |
</section> |
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import { navigator } from "@hotwired/turbo"; | |
import { Controller } from "stimulus"; | |
import { useMutation } from "stimulus-use"; | |
export default class extends Controller { | |
connect() { | |
useMutation(this, { attributes: true, childList: true, subtree: true }); | |
} | |
mutate(entries) { |
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