MIGRATION: Add tables and models for Examples::Post

Author: rossta

app/models/examples.rb

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+module Examples
+  def self.table_name_prefix
+    "examples_"
+  end
+end

app/models/examples/post.rb

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+class Examples::Post < ApplicationRecord
+  delegated_type :postable, types: %w[
+    Examples::Posts::Markdown
+    Examples::Posts::Link
+    Examples::Posts::Image
+  ]
+end

app/models/examples/posts.rb

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+module Examples::Posts
+  def self.table_name_prefix
+    "examples_posts_"
+  end
+end

app/models/examples/posts/image.rb

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+class Examples::Posts::Image < ApplicationRecord
+end

app/models/examples/posts/link.rb

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+class Examples::Posts::Link < ApplicationRecord
+end

app/models/examples/posts/markdown.rb

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+class Examples::Posts::Markdown < ApplicationRecord
+end

db/migrate/20240721210055_create_examples_posts.rb

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+class CreateExamplesPosts < ActiveRecord::Migration[7.1]
+  def change
+    create_table :examples_posts do |t|
+      t.string :title, null: false
+      t.references :postable, polymorphic: true, null: false
+
+      t.timestamps
+    end
+  end
+end

db/migrate/20240721210214_create_examples_posts_markdowns.rb

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+class CreateExamplesPostsMarkdowns < ActiveRecord::Migration[7.1]
+  def change
+    create_table :examples_posts_markdowns do |t|
+      t.text :body, null: false
+
+      t.timestamps
+    end
+  end
+end

db/migrate/20240721210228_create_examples_posts_links.rb

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+class CreateExamplesPostsLinks < ActiveRecord::Migration[7.1]
+  def change
+    create_table :examples_posts_links do |t|
+      t.string :url, null: false
+
+      t.timestamps
+    end
+  end
+end

db/migrate/20240721210414_create_examples_posts_images.rb

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+class CreateExamplesPostsImages < ActiveRecord::Migration[7.1]
+  def change
+    create_table :examples_posts_images do |t|
+      t.string :url, null: false
+
+      t.timestamps
+    end
+  end
+end