FIX: Include entire slug path in permalinks

This is a temporary fix since these URLs should contain the id as well.

app/models/category.rb

@@ -682,10 +682,9 @@ class Category < ActiveRecord::Base
   def url
     url = @@url_cache[self.id]
     unless url
-      url = +"#{Discourse.base_uri}/c"
-      url << "/#{parent_category.slug_for_url}" if parent_category_id
-      url << "/#{slug_for_url}"
-      @@url_cache[self.id] = -url
+      url = "#{Discourse.base_uri}/c/#{slug_path.join('/')}"
+
+      @@url_cache[self.id] = url
     end
 
     url
@@ -708,7 +707,7 @@ class Category < ActiveRecord::Base
   def create_category_permalink
     old_slug = saved_changes.transform_values(&:first)["slug"]
     url = +"#{Discourse.base_uri}/c"
-    url << "/#{parent_category.slug}" if parent_category_id
+    url << "/#{parent_category.slug_path.join('/')}" if parent_category_id
     url << "/#{old_slug}"
     url = Permalink.normalize_url(url)
 
@@ -720,11 +719,7 @@ class Category < ActiveRecord::Base
   end
 
   def delete_category_permalink
-    if self.parent_category
-      permalink = Permalink.find_by_url("c/#{self.parent_category.slug}/#{slug}")
-    else
-      permalink = Permalink.find_by_url("c/#{slug}")
-    end
+    permalink = Permalink.find_by_url("c/#{slug_path.join('/')}")
     permalink.destroy if permalink
   end
 

spec/models/category_spec.rb

@@ -661,36 +661,68 @@ describe Category do
   end
 
   describe "#url" do
-    it "builds a url for normal categories" do
-      category = Fabricate(:category_with_definition, name: "cats")
-      expect(category.url).to eq "/c/cats"
+    before_all do
+      SiteSetting.max_category_nesting = 3
+    end
+
+    fab!(:category) { Fabricate(:category, name: "root") }
+
+    fab!(:sub_category) do
+      Fabricate(
+        :category,
+        name: "child",
+        parent_category_id: category.id,
+      )
+    end
+
+    fab!(:sub_sub_category) do
+      Fabricate(
+        :category,
+        name: "child_of_child",
+        parent_category_id: sub_category.id,
+      )
+    end
+
+    describe "for normal categories" do
+      it "builds a url" do
+        expect(category.url).to eq("/c/root")
+      end
     end
 
     describe "for subcategories" do
-      it "includes the parent category" do
-        parent_category = Fabricate(:category_with_definition, name: "parent")
+      it "builds a url" do
+        expect(sub_category.url).to eq("/c/root/child")
+      end
+    end
 
-        subcategory =
-          Fabricate(
-            :category_with_definition,
-            name: "child",
-            parent_category_id: parent_category.id
-          )
-
-        expect(subcategory.url).to eq "/c/parent/child"
+    describe "for sub-sub-categories" do
+      it "builds a url" do
+        expect(sub_sub_category.url)
+          .to eq("/c/root/child/child-of-child")
       end
     end
   end
 
   describe "#url_with_id" do
-    fab!(:category) { Fabricate(:category_with_definition, name: 'cats') }
+    fab!(:category) do
+      Fabricate(
+        :category_with_definition,
+        name: 'cats',
+      )
+    end
 
     it "includes the id in the URL" do
       expect(category.url_with_id).to eq("/c/cats/#{category.id}")
     end
 
     context "child category" do
-      fab!(:child_category) { Fabricate(:category_with_definition, parent_category_id: category.id, name: 'dogs') }
+      fab!(:child_category) do
+        Fabricate(
+          :category,
+          parent_category_id: category.id,
+          name: 'dogs',
+        )
+      end
 
       it "includes the id in the URL" do
         expect(child_category.url_with_id).to eq("/c/cats/dogs/#{child_category.id}")