FIX: Form template limit validation (#28791)

spec/models/form_template_spec.rb

@@ -11,6 +11,48 @@ RSpec.describe FormTemplate, type: :model do
     expect(described_class.count).to eq(1)
   end
 
+  context "when length validations set in SiteSetting" do
+    before do
+      SiteSetting.max_form_template_content_length = 50
+      SiteSetting.max_form_template_title_length = 5
+    end
+
+    it "can't exceed max title length" do
+      t = Fabricate.build(:form_template, name: "Bug Report", template: "- type: input\n  id: name")
+      expect(t.save).to eq(false)
+      expect(t.errors.full_messages.first).to include(
+        "Name #{I18n.t("errors.messages.too_long", count: SiteSetting.max_form_template_title_length)}",
+      )
+    end
+
+    it "can't exceed max content length" do
+      t =
+        Fabricate.build(
+          :form_template,
+          name: "Bug",
+          template: "- type: input\n  id: name-that-is-really-long-to-make-the-template-longer",
+        )
+      expect(t.save).to eq(false)
+      expect(t.errors.full_messages.first).to include(
+        "Template #{I18n.t("errors.messages.too_long", count: SiteSetting.max_form_template_content_length)}",
+      )
+    end
+
+    it "should update validation limits when the site setting has been changed" do
+      SiteSetting.max_form_template_content_length = 100
+      SiteSetting.max_form_template_title_length = 100
+
+      t =
+        Fabricate.build(
+          :form_template,
+          name: "Bug Report",
+          template: "- type: input\n  id: name-that-is-really-long-to-make-the-template-longer",
+        )
+
+      expect(t.save).to eq(true)
+    end
+  end
+
   it "can't have an invalid yaml template" do
     template = "- type: checkbox\nattributes; bad"
     t = Fabricate.build(:form_template, name: "Feature Request", template: template)