Ensure check box and radio button labels have the correct for attribute when using a custom id

lib/trestle/form/fields/check_box.rb

@@ -22,11 +22,23 @@ def field
           tag.div(class: wrapper_class) do
             safe_join([
               builder.raw_check_box(name, options.merge(class: input_class), checked_value, unchecked_value),
-              builder.label(name, options[:label] || admin.human_attribute_name(name), class: label_class, value: (checked_value if options[:multiple]))
+              builder.label(name, label, label_options)
             ])
           end
         end
 
+        def label
+          options[:label] || admin.human_attribute_name(name)
+        end
+
+        def label_options
+          {
+            class: label_class,
+            value: (checked_value if options[:multiple]),
+            for: options[:id]
+          }.compact
+        end
+
         def extract_wrapper_options!
           # Intentional no-op
         end

lib/trestle/form/fields/radio_button.rb

@@ -23,11 +23,23 @@ def field
           tag.div(class: wrapper_class) do
             safe_join([
               builder.raw_radio_button(name, tag_value, options.merge(class: input_class)),
-              builder.label(name, options[:label] || tag_value.to_s.humanize, value: tag_value, class: label_class)
+              builder.label(name, label, label_options)
             ])
           end
         end
 
+        def label
+          options[:label] || tag_value.to_s.humanize
+        end
+
+        def label_options
+          {
+            class: label_class,
+            value: tag_value,
+            for: options[:id]
+          }.compact
+        end
+
         def extract_wrapper_options!
           # Intentional no-op
         end

spec/trestle/form/fields/check_box_spec.rb

@@ -39,6 +39,18 @@
     end
   end
 
+  context "when options[:id] is specified" do
+    let(:options) { { id: "custom-id" } }
+
+    it "overrides the id attribute on the input element" do
+      expect(subject).to have_tag("input.form-check-input", with: { id: "custom-id" })
+    end
+
+    it "overrides the for attribute on the label element" do
+      expect(subject).to have_tag("label", with: { for: "custom-id" })
+    end
+  end
+
   context "when options[:label] is specified" do
     let(:options) { { label: "Custom Label" } }
 

spec/trestle/form/fields/radio_button_spec.rb

@@ -25,6 +25,18 @@
     end
   end
 
+  context "when options[:id] is specified" do
+    let(:options) { { id: "custom-id" } }
+
+    it "overrides the id attribute on the input element" do
+      expect(subject).to have_tag("input.form-check-input", with: { id: "custom-id" })
+    end
+
+    it "overrides the for attribute on the label element" do
+      expect(subject).to have_tag("label", with: { for: "custom-id" })
+    end
+  end
+
   context "when options[:label] is specified" do
     let(:options) { { label: "Custom Label" } }