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Is it possible for me to create and use a database table that contains no :id column in ActiveRecord, Ruby on Rails.
I don't merely want to ignore the id column, but I wish it to be absolutely non-existent.
Table Example :key_column :value_column 0cc175b9c0f1b6a831c399e269772661 0cc175b9c0f1b6a831c399e269772661 4a8a08f09d37b73795649038408b5f33 0d61f8370cad1d412f80b84d143e1257 92eb5ffee6ae2fec3ad71c777531578f 9d5ed678fe57bcca610140957afab571 Any more info ( like an :id_column ) would break the whole feature.
How would I implement something like this in rails?
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When you already have users and uploads tables and wish to add a new relationship between them. Then, run the migration using rake db:migrate . This migration will take care of adding a new column named user_id to uploads table (referencing id column in users table), PLUS it will also add an index on the new column.
You don't need a Rails app directory or a SQLite database file; all you need is these two Ruby code files.
How do I remove a column from a table in Ruby on Rails? remove_column :table_name, :column_name, :type Removes column, also adds column back if migration is rollbacked. Note: If you skip the data_type, the migration will remove the column successfully but if you rollback the migration it will throw an error.
yup, looks like this:
create_table :my_table, id: false do |t| t.string :key_column t.string :value_column end just make sure to include the
id: false part.
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