Migrate Kentico EMS to Kentico Kontent - Part 1: Taxonomy

Introduction

I have recently been working on a project with the goal to migrate all the content from Kentico EMS to Kentico Kontent. In this post I will share code examples on how to migrate the Kentico EMS categories to Kentico Kontent taxonomies.

Note: at the moment of writing this post, the Kentico Kontent Content Management SDK does not target the v2 API. Therefor the code will be based on executing a HttpWebRequest and posting the json data.

Enable the Content Management API

We will need to the enable the Content Management API in Kentico Kontent and setup the Project ID and API Key:

var apikey = "YOUR_API_KEY";
var projectid = "YOUR_PROJECT_ID";

Create the HttpWebRequest

Using a HttpWebRequest we will pass in the necessary authorization headers:

var url = $"https://manage.kenticocloud.com/v2/projects/{projectid}/taxonomies";

var httpWebRequest = (HttpWebRequest)WebRequest.Create(url);
httpWebRequest.ContentType = "application/json";
httpWebRequest.Headers.Add("Authorization", $"Bearer {apikey}");
httpWebRequest.Method = "POST";

Get the JSON

I am a big fan of SQL and it's is quite easy to return the CMS Categories from Kentico EMS in a JSON format that matches the data definition that the Taxonomy endpoint requires. By adding FOR JSON AUTO to the end of your query will automagically transform the output to JSON. 👍

var query = @"SELECT [CategoryDisplayName] AS [name], 
                     'tax-term-' + cast([CategoryID] as varchar(10)) AS [external_id],
                     '[]' AS [terms]
              FROM 
                     [CMS_Category]
              ORDER BY
                     [CategoryDisplayName]
              FOR JSON AUTO";

Note: the provided example code only supports 1 level of categories. You will have to write some additional code to support the hierarchy of categories by passing in nested terms.

What I really like about the Kentico Kontent Content Management API is that you can use external ID's to make a reference to your original data. This allows you to apply updates to your content without having to do the whole migration process over again. 👍

Execute the SQL query

Execute the SQL query and get the JSON result back. A simple example can be found below:

var taxonomy = new StringBuilder();

using (var conn = new SqlConnection("YOUR_CONNECTION_STRING"))
{
   conn.Open();
   SqlCommand command = new SqlCommand(query, conn);

   using (SqlDataReader reader = command.ExecuteReader())
   {
      if (reader.HasRows)
      {
         while (reader.Read())
         {
            taxonomy.Append(Convert.ToString(reader[0]));
         }
      }
   }
}

Finalize the JSON

The JSON returned from SQL contains all the categories (a.k.a. terms) that we will pass to Kentico Kontent as a new Taxonomy. To finalize the JSON data we will have to add the Taxonomy Group that will contain the Taxonomy terms:

var finaljson = @"{'name': 'Name of Taxonomy Group',
                   'external_id': 'tax-term-001',
                   'terms': " + json + @"}";

Post the JSON data via the HttpWebRequest

The last step consists out of posting the JSON data using the HttpWebRequest that we created earlier on in this post:

using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
{  
   streamWriter.Write(finaljson );
}

var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
{
   var result = streamReader.ReadToEnd();
}

And that is all! Hope this helps 😄