In this tutorial, we will discuss how to get a list of all tables in a Rails application that are currently connected to the database using the ActiveRecord code. Understanding the structure of the database is an important aspect of web development, especially when dealing with large and complex applications. The ActiveRecord::Base module provides an easy and efficient way to access the database and retrieve the list of tables.
ActiveRecord::Base.connection.tables
The code above, ActiveRecord::Base.connection.tables, is used to get a list of all tables in a Rails application that are currently connected to the database.
It uses the ActiveRecord::Base module which is the base class for all models in Rails, it provides an interface for connecting to the database.
The connection method is used to get the connection to the database. This returns an instance of the ActiveRecord::ConnectionAdapters::AbstractAdapter class.
The tables method is used to get an array of all tables in the connected database. This method is defined in the AbstractAdapter class and it is implemented by the specific adapter you are using (e.g. MySQL, PostgreSQL, etc.).
It returns an array of strings, representing the names of the tables in the connected database. This can be useful for programmatically inspecting the structure of the database or for building dynamic queries.
Note that this method does not return all tables in the database, it only returns the tables that are connected by the ActiveRecord models, if you have tables in your database that are not connected to any model, they will not be returned by this method.
Conclusion:
In conclusion, we have seen how to use the ActiveRecord::Base.connection.tables code to get a list of all tables in a Rails application that are currently connected to the database. This method uses the ActiveRecord::Base module, which provides an interface for connecting to the database, the connection method to get the connection to the database and the tables method to get an array of all tables in the connected database. This method can be useful for programmatically inspecting the structure of the database or
