Deprecate implicit DOM ID on elements in element_view_for

Relying on the default DOM ID for your element is deprecated and will
be removed from Alchemy 6.1. If you do not need a DOM ID on your
elements you can just ignore this message. But if you NEED a DOM ID
on your elements, please pass the desired DOM ID as `id` option into
`element_view_for`.

app/helpers/alchemy/elements_block_helper.rb

@@ -125,13 +125,21 @@ def ingredient_by_role(role)
     # @option options :tags_formatter
     #   A lambda used for formatting the element's tags (see Alchemy::ElementsHelper::element_tags_attributes). Set to +false+ to not include tags in the wrapper element.
     #
-    def element_view_for(element, options = {})
+    def element_view_for(element, opts = {})
       options = {
         tag: :div,
         id: "#{element.name}_#{element.id}",
         class: element.name,
         tags_formatter: ->(tags) { tags.join(" ") },
-      }.merge(options)
+      }.merge(opts)
+
+      if opts[:id].nil?
+        Alchemy::Deprecation.warn(
+          "Relying on the default DOM ID for your '#{element.name}' element is deprecated and will be removed from Alchemy 6.1. " \
+          "If you do not need a DOM ID on your '#{element.name}' element you can just ignore this message. " \
+          "But if you NEED a DOM ID on your element, please pass the desired DOM ID as `id` option into `element_view_for`."
+        )
+      end
 
       # capture inner template block
       output = capture do

spec/helpers/alchemy/elements_block_helper_spec.rb

@@ -11,6 +11,12 @@ module Alchemy
     let(:expected_wrapper_tag) { "div.#{element.name}##{element.name}_#{element.id}" }
 
     describe "#element_view_for" do
+      around do |exmple|
+        Alchemy::Deprecation.silence do
+          exmple.run
+        end
+      end
+
       it "should yield an instance of ElementViewHelper" do
         expect { |b| element_view_for(element, &b) }.
           to yield_with_args(ElementsBlockHelper::ElementViewHelper)

spec/helpers/alchemy/elements_helper_spec.rb

@@ -13,6 +13,12 @@ module Alchemy
     end
 
     describe "#render_element" do
+      around do |example|
+        Alchemy::Deprecation.silence do
+          example.run
+        end
+      end
+
       subject { render_element(element) }
 
       context "with nil element" do
@@ -79,6 +85,12 @@ module Alchemy
     end
 
     describe "#render_elements" do
+      around do |example|
+        Alchemy::Deprecation.silence do
+          example.run
+        end
+      end
+
       subject { helper.render_elements(options) }
 
       let(:page) { create(:alchemy_page, :public) }