[WIP] Sorting on globalized attributes of associations breaks when joining translations (#1614)

* Initial plan

* Changes before error encountered

Co-authored-by: scarroll32 <11340230+scarroll32@users.noreply.github.com>

* Improve sorted translations docs

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: scarroll32 <11340230+scarroll32@users.noreply.github.com>

Author: Copilot

docs/docs/getting-started/sorting.md

@@ -69,3 +69,41 @@ class PostsController < ActionController::Base
   end
 end
 ```
+
+## Sorting on Association Attributes
+
+You can sort on attributes of associated models by using the association name followed by the attribute name:
+
+```ruby
+# Sort by the name of the associated category
+@q = Post.ransack(s: 'category_name asc')
+@posts = @q.result
+
+# Sort by attributes of nested associations
+@q = Post.ransack(s: 'category_section_title desc')
+@posts = @q.result
+```
+
+### Sorting on Globalized/Translated Attributes
+
+When working with internationalized models (like those using the Globalize gem), special care is needed when sorting on translated attributes of associations. The simplest approach is to use the `sort_link` helper directly with the translation attribute:
+
+```erb
+<!-- This works perfectly for sorting on translated attributes -->
+<%= sort_link @q, :translations_name %>
+<%= sort_link @q, :category_translations_name %>
+```
+
+For programmatic sorting, let Ransack handle the joins first:
+
+```ruby
+# Let Ransack establish the necessary joins for sorting
+@q = Book.ransack(s: 'category_translations_name asc')
+@books = @q.result.joins(:translations)
+
+# For complex scenarios with multiple translations
+@q = Book.ransack(s: 'category_translations_name asc')
+@books = @q.result.includes(:translations, category: :translations)
+```
+
+This ensures that Ransack properly handles the join dependencies between your main model's translations and the associated model's translations.

docs/docs/going-further/i18n.md

@@ -51,3 +51,46 @@ en:
       namespace_article:
         title: Old Ransack Namespaced Title
 ```
+
+## Working with Globalized Attributes
+
+If you're using the [Globalize gem](https://github.com/globalize/globalize) for internationalized model attributes, you may encounter issues when sorting on translated attributes of associations while also joining the main model's translations.
+
+For example, if you have a `Book` model with translated `title` and a `Category` model with translated `name`, sorting on the category's translated name while joining the book's translations may not work as expected:
+
+```ruby
+# This may not work correctly:
+Book.joins(:translations).ransack({ s: ['category_translations_name asc'] }).result
+```
+
+### Workaround for Globalized Attributes Sorting
+
+When working with globalized attributes and you need to sort on translated fields of associations, the simplest and most effective approach is to use the `sort_link` helper with the translation attribute directly:
+
+```erb
+<!-- This works perfectly for sorting on translated attributes -->
+<%= sort_link @search, :translations_name %>
+<%= sort_link @search, :category_translations_name %>
+```
+
+For programmatic sorting, let Ransack handle the joins first:
+
+```ruby
+# Instead of joining translations first, let Ransack handle the joins:
+search = Book.ransack({ s: ['category_translations_name asc'] })
+results = search.result.joins(:translations)
+
+# Or use the includes method to ensure all necessary translations are loaded:
+search = Book.ransack({ s: ['category_translations_name asc'] })
+results = search.result.includes(:translations, category: :translations)
+
+# For more complex scenarios, you can manually specify the joins:
+search = Book.ransack({ s: ['category_translations_name asc'] })
+results = search.result
+  .joins(:translations)
+  .joins(category: :translations)
+```
+
+The key is to let Ransack establish the necessary joins for sorting first, then add any additional joins you need for the query.
+
+This approach ensures that Ransack properly handles the complex join dependencies between your main model's translations and the associated model's translations.

docs/docs/going-further/other-notes.md

@@ -116,6 +116,39 @@ def index
 end
 ```
 
+### Problem with Globalized Attributes and Sorting
+
+When using internationalization gems like [Globalize](https://github.com/globalize/globalize), you may encounter issues when trying to sort on translated attributes of associations while also having pre-existing joins to translation tables.
+
+**Problem scenario:**
+```ruby
+# This may fail to generate proper joins:
+Book.joins(:translations).ransack({ s: ['category_translations_name asc'] }).result
+```
+
+**Solution:**
+The simplest and most effective approach is to use the `sort_link` helper directly with the translation attribute:
+
+```erb
+<!-- This works perfectly for sorting on translated attributes -->
+<%= sort_link @search, :translations_name %>
+<%= sort_link @search, :category_translations_name %>
+```
+
+For programmatic sorting, let Ransack establish the sorting joins first, then add your additional joins:
+
+```ruby
+# Let Ransack handle the sorting joins first
+search = Book.ransack({ s: ['category_translations_name asc'] })
+results = search.result.joins(:translations)
+
+# Or use includes for complex scenarios
+search = Book.ransack({ s: ['category_translations_name asc'] })
+results = search.result.includes(:translations, category: :translations)
+```
+
+This ensures that Ransack properly handles the join dependencies between your main model's translations and the associated model's translations.
+
 #### `PG::UndefinedFunction: ERROR: could not identify an equality operator for type json`
 
 If you get the above error while using `distinct: true` that means that