Merge pull request #4866 from JaredReisinger/admin-user-pagination

Add pagination to /admin/users/list API

lib/admin_user_index_query.rb

@@ -25,7 +25,11 @@ class AdminUserIndexQuery
   }
 
   def find_users(limit=100)
-    find_users_query.limit(limit)
+    page = params[:page].to_i - 1
+    if page < 0
+        page = 0
+    end
+    find_users_query.limit(limit).offset(page * limit)
   end
 
   def count_users

spec/components/admin_user_index_query_spec.rb

@@ -43,6 +43,28 @@ describe AdminUserIndexQuery do
     end
   end
 
+  describe "pagination" do
+    it "defaults to the first page" do
+      query = ::AdminUserIndexQuery.new({})
+      expect(query.find_users.to_sql).to match("OFFSET 0")
+    end
+
+    it "offsets by 100 by default for page 2" do
+      query = ::AdminUserIndexQuery.new({ page: "2"})
+      expect(query.find_users.to_sql).to match("OFFSET 100")
+    end
+
+    it "offsets by limit for page 2" do
+      query = ::AdminUserIndexQuery.new({ page: "2"})
+      expect(query.find_users(10).to_sql).to match("OFFSET 10")
+    end
+
+    it "ignores negative pages" do
+      query = ::AdminUserIndexQuery.new({ page: "-2" })
+      expect(query.find_users.to_sql).to match("OFFSET 0")
+    end
+  end
+
   describe "no users with trust level" do
 
     TrustLevel.levels.each do |key, value|