public void Automatically_migrate_to_new_Schema()
{
var repository = new BlogRepository(this._redisClient);
// Populate the DataStore with the old schema from the 'BlogPostBestPractice'
BlogPostBestPractice.InsertTestData(repository);
// Create a typed-client based on the new schema
var redisBlogPosts = this._redisClient.As <New.BlogPost>();
// Automatically retrieve blog posts
var allBlogPosts = redisBlogPosts.GetAll();
// Print out the data in the list of 'New.BlogPost' populated from old 'BlogPost' type
// Note: renamed fields are lost
Console.WriteLine(allBlogPosts.ToJson());
}
public void Manually_migrate_to_new_Schema_using_a_custom_tranlation()
{
var repository = new BlogRepository(this._redisClient);
// Populate the DataStore with the old schema from the 'BlogPostBestPractice'
BlogPostBestPractice.InsertTestData(repository);
// Create a typed-client based on the new schema
var redisBlogPosts = this._redisClient.As <BlogPost>();
var redisNewBlogPosts = this._redisClient.As <New.BlogPost>();
// Automatically retrieve blog posts
var oldBlogPosts = redisBlogPosts.GetAll();
// Write a custom translation layer to migrate to the new schema
var migratedBlogPosts = oldBlogPosts.Select(old => new New.BlogPost {
Id = old.Id,
BlogId = old.BlogId,
Title = old.Title,
Content = old.Content,
Labels = old.Categories, // populate with data from renamed field
PostType = BlogPostType.Article, // select non-default enum value
Tags = new HashSet <string>(old.Tags),
Comments = old.Comments.ConvertAll(x =>
new Dictionary <string, string> {
{ "Content", x.Content },
{ "CreatedDate", x.CreatedDate.ToString() }
}),
NoOfComments = old.Comments.Count // populate using logic from old data
}).ToList();
// Persist the new migrated blog posts
redisNewBlogPosts.StoreAll(migratedBlogPosts);
// Read out the newly stored blog posts
var refreshedNewBlogPosts = redisNewBlogPosts.GetAll();
// Note: data renamed fields are successfully migrated to the new schema
Console.WriteLine(refreshedNewBlogPosts.ToJson());
}
