Allow file to be -pended

Gemfile

@@ -8,4 +8,4 @@ gem "drb" if Gem::Version.new(RUBY_VERSION) >= Gem::Version.new("3.4.0")
 gem "mutex_m" if Gem::Version.new(RUBY_VERSION) >= Gem::Version.new("3.4.0")
 gem "rails", BootstrapForm::REQUIRED_RAILS_VERSION
 gem "sprockets-rails", require: "sprockets/railtie"
-gem "sqlite3", "~> 1.4"
+gem "sqlite3", ">= 1.4"

demo/app/models/user.rb

@@ -10,12 +10,12 @@ class User < ApplicationRecord
   validates :status, presence: true, if: -> { age > 42 }
   validates :misc, presence: true, unless: -> { feet == 5 }
 
-  has_one :address
+  has_one :address, dependent: nil
   accepts_nested_attributes_for :address
 
   has_rich_text(:life_story)
 
-  def always
+  def always # rubocop:disable Naming/PredicateMethod
     true
   end
 

lib/bootstrap_form/inputs/collection_check_boxes.rb

@@ -34,11 +34,11 @@ def field_name(method, *methods, multiple: false, index: @options[:index])
           def field_name_shim(object_name, method_name, *method_names, multiple: false, index: nil)
             names = method_names.map! { |name| "[#{name}]" }.join
             if object_name.blank?
-              "#{method_name}#{names}#{multiple ? '[]' : ''}"
+              "#{method_name}#{names}#{'[]' if multiple}"
             elsif index
-              "#{object_name}[#{index}][#{method_name}]#{names}#{multiple ? '[]' : ''}"
+              "#{object_name}[#{index}][#{method_name}]#{names}#{'[]' if multiple}"
             else
-              "#{object_name}[#{method_name}]#{names}#{multiple ? '[]' : ''}"
+              "#{object_name}[#{method_name}]#{names}#{'[]' if multiple}"
             end
           end
         end

lib/bootstrap_form/inputs/file_field.rb

@@ -10,7 +10,7 @@ module FileField
         def file_field_with_bootstrap(name, options={})
           options = options.reverse_merge(control_class: "form-control")
           form_group_builder(name, options) do
-            input_with_error(name) do
+            prepend_and_append_input(name, options) do
               file_field_without_bootstrap(name, options)
             end
           end

test/bootstrap_form_group_test.rb

@@ -195,6 +195,51 @@ class BootstrapFormGroupTest < ActionView::TestCase
     assert_equivalent_html expected, bootstrap_form_for(@user) { |f| f.text_field :email, prepend: "$", append: ".00" }
   end
 
+  test "file field with prepend text" do
+    expected = <<~HTML
+      <div class="mb-3">
+        <label class="form-label" for="user_avatar">Avatar</label>
+        <div class="input-group">
+          <span class="input-group-text">before</span>
+          <input class="form-control" id="user_avatar" name="user[avatar]" type="file" />
+        </div>
+      </div>
+    HTML
+    assert_equivalent_html expected, @builder.file_field(:avatar, prepend: "before")
+  end
+
+  test "file field with append text" do
+    expected = <<~HTML
+      <div class="mb-3">
+        <label class="form-label" for="user_avatar">Avatar</label>
+        <div class="input-group">
+          <input class="form-control" id="user_avatar" name="user[avatar]" type="file" />
+          <span class="input-group-text">after</span>
+        </div>
+      </div>
+    HTML
+    assert_equivalent_html expected, @builder.file_field(:avatar, append: "after")
+  end
+
+  test "file field with append and prepend button" do
+    prefix = '<div class="mb-3"><label class="form-label" for="user_avatar">Avatar</label><div class="input-group">'
+    field = <<~HTML
+      <input class="form-control" id="user_avatar" name="user[avatar]" type="file" />
+    HTML
+    button_src = link_to("Click", "#", class: "btn btn-secondary")
+    button_prepend = button_src
+    button_append = button_src
+    suffix = "</div></div>"
+    after_button = prefix + field + button_append + suffix
+    before_button = prefix + button_prepend + field + suffix
+    both_button = prefix + button_prepend + field + button_append + suffix
+    multiple_button = prefix + button_prepend + button_prepend + field + button_append + button_append + suffix
+    assert_equivalent_html after_button, @builder.file_field(:avatar, append: button_src)
+    assert_equivalent_html before_button, @builder.file_field(:avatar, prepend: button_src)
+    assert_equivalent_html both_button, @builder.file_field(:avatar, append: button_src, prepend: button_src)
+    assert_equivalent_html multiple_button, @builder.file_field(:avatar, append: [button_src] * 2, prepend: [button_src] * 2)
+  end
+
   test "help messages for default forms" do
     expected = <<~HTML
       <div class="mb-3">