Simplify installer (#5)

* Slim down installer and have it use a final schema instead of migrations

* Update README to detail new installation

* Update README.md

Co-authored-by: Nick Pezza <pezza@hey.com>

* Update README.md

Co-authored-by: Nick Pezza <pezza@hey.com>

* Update install_generator.rb

---------

Co-authored-by: Nick Pezza <pezza@hey.com>

README.md

@@ -20,19 +20,57 @@ Or install it yourself as:
 $ gem install solid_cable
 ```
 
-Now, you need to install the necessary migrations and configure Action Cable's adapter.
+Now, you need to run the installer:
 
 ```bash
 $ bin/rails generate solid_cable:install
 ```
 
-If you want to install to a different database you can pass an env variable.
-```bash
-$ DATABASE=cable bin/rails generate solid_cable:install
+This will create the `db/cable_schema.rb` file.
+
+You will then have to add the configuration for the database in `config/database.yml`. If you're using SQLite, it'll look something like this:
+
+```yaml
+production:
+  primary:
+    <<: *default
+    database: storage/production.sqlite3
+  cable:
+    <<: *default
+    database: storage/production_cable.sqlite3
+    migrations_paths: db/cable_migrate
+```
+
+...or if you're using MySQL/PostgreSQL/Trilogy:
+
+```yaml
+production:
+  primary: &primary_production
+    <<: *default
+    database: app_production
+    username: app
+    password: <%= ENV["APP_DATABASE_PASSWORD"] %>
+  cable:
+    <<: *primary_production
+    database: app_production_cable
+    migrations_paths: db/cable_migrate
 ```
 
-Update `config/cable.yml` to use the new adapter. connects_to is can be omitted
-if you want to use the primary database.
+> [!NOTE]
+> Calling `bin/rails generate solid_cable:install` will automatically setup `config/cable.yml`, so no additional configuration is needed there (although you must make sure that you use the `cable` name in `database.yml` for this to match!). But if you want to use Solid Cable in a different environment (like staging or even development), you'll have to manually add that `connects_to` block to the respective environment in the `config/cable.yml` file. And, as always, make sure that the name you're using for the database in `config/cable.yml` matches the name you define in `config/database.yml`.
+
+Then run `db:prepare` in production to ensure the database is created and the schema is loaded.
+
+## Usage
+
+By default messages are kept around forever. SolidCable ships with a job to
+prune messages. You can run `SolidCable::PruneJob.perform_later` which removes
+Messages that are older than what is specified in `keep_messages_around_for`
+setting.
+
+## Configuration
+
+All configuration is managed via the `config/cable.yml`file. To use Solid Cable, the `adapter` value *must be* `solid_cable`. When using Solid Cable, the other values you can set are: `connects_to`, `polling_interval`, `silence_polling`, and `keep_messages_around_for`. For example:
 
 ```yaml
 default: &default
@@ -56,16 +94,5 @@ production:
   polling_interval: 0.1.seconds
 ```
 
-Finally, you need to run the migrations:
-
-```bash
-$ bin/rails db:migrate
-```
-
-By default messages are kept around forever. SolidCable ships with a job to
-prune messages. You can run `SolidCable::PruneJob.perform_later` which removes
-Messages that are older than what is specified in `keep_messages_around_for`
-setting.
-
 ## License
 The gem is available as open source under the terms of the [MIT License](https://opensource.org/licenses/MIT).

lib/generators/solid_cable/install/install_generator.rb

@@ -3,21 +3,36 @@
 class SolidCable::InstallGenerator < Rails::Generators::Base
   source_root File.expand_path("templates", __dir__)
 
-  class_option :database,
-               type: :string, aliases: %i(--db),
-               desc: "The database for your migration. By default, the " \
-                     "current environment's primary database is used."
-  class_option :skip_migrations, type: :boolean, default: nil,
-                                 desc: "Skip migrations"
+  def add_solid_errors_db_schema
+    template "cable_schema.rb"
+  end
+
+  def configure_production_cable
+    gsub_file("config/cable.yml",
+              old_production_cable_config,
+              new_production_cable_config)
+  end
 
-  def create_migrations
-    return if options[:skip_migrations]
+  private
 
-    db_clause = "DATABASE=#{options[:database]}" if options[:database].present?
+  def old_production_cable_config
+    <<~YAML
+      production:
+        adapter: redis
+        url: <%%= ENV.fetch("REDIS_URL") { "redis://localhost:6379/1" } %>
+        channel_prefix: <%= app_name %>_production
+    YAML
+  end
 
-    rails_command(
-      "railties:install:migrations FROM=solid_cable #{db_clause}".strip,
-      inline: true
-    )
+  def new_production_cable_config
+    <<~YAML
+      production:
+        adapter: solid_cable
+        connects_to:
+          database:
+            writing: cable
+        polling_interval: 0.1.seconds
+        keep_messages_around_for: 1.day
+    YAML
   end
 end

lib/generators/solid_cable/install/templates/cable_schema.rb

@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+ActiveRecord::Schema[7.1].define(version: 1) do
+  create_table "solid_cable_messages", force: :cascade do |t|
+    t.text "channel"
+    t.text "payload"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["channel"], name: "index_solid_cable_messages_on_channel",
+                         length: 500
+    t.index ["created_at"], name: "index_solid_cable_messages_on_created_at"
+  end
+end