![]() Would love to hear your thoughts on other types of projects that Sequel is a good fit for. Building small web app or API outside of Rails.Using a database other than the Rails standard of PostreSQL or Mysql.macOS users can use ddev sequelace to launch the free Sequel Ace database. Start with the basics and learn about advanced features of PostgreSQL as you go along. It includes the entire state of the db server, so in. Just connect to a database and begin working with tables and views. ![]() Postico will look familiar to anyone who has used a Mac before. (( recordrdoc.html)īased on my experience with Sequel so far I've come up with some heuristics for the types of projects on which I would consider using Sequel instead of ActiveRecord. Postico provides an easy to use interface, making Postgres more accessible for newcomers and specialists alike.Multiple layers of abstraction for querying by using Datasets and Models.Extensive documentation with great examples of Sequel.We can also use the schema_caching plugin to ensure Sequel only needs to do one describe of the database tables for each shard. Using the with_server method that Sequel provides, we can create our own method that takes a block and within that block use the correct shard connection for all queries in that block. This example addresses the concerns with our ActiveRecord spike and provides a simple interface to set the shard connection. synchronize end end end CustomerShardManager. shard_name ( customer_id )) do CUSTOMER_DB. use_customer ( customer_id ) CUSTOMER_DB. I then wrote a class to handle creating the proper child classes which would inherit from the proper abstract class based on the customer_id and database table.Ĭlass Post < Sequel :: Model ( CUSTOMER_DB ) one_to_many :comments def excerpt text end end class Comment < Sequel :: Model ( CUSTOMER_DB ) many_to_one :post end class CustomerShardManager #. My initial strategy was using ActiveRecord to create a new abstract class to connect to each shard. Below is a diagram of the database setup. Some of these shards were unique to a customer in order to provide siloing of a customer's data, and some shards contained multiple smaller customers. Each customer's data, however, was stored in one of dozens of customer database shards. The sharding setup for this Oracle database was a central "Main" database that held basic information like user logins and global customer information. On one such project I needed to build a Ruby API over a legacy Oracle database with a custom sharding setup. In some of my more recent Ruby projects I've had the chance to use the Sequel gem instead of the traditional choice of ActiveRecord and have been very impressed.
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