[RUBY] PG :: DatatypeMismatch error when doing heroku run rails db: migrate

error contents

PG::DatatypeMismatch: ERROR: default for column "complete" cannot be cast automatically to type integer

I was told that the complete column cannot be automatically converted to an integer.

The cause is

 def up
    change_column :habits, :complete, :integer, using: 'complete :: integer'
  end

  def down
    change_column :habits, :complete, :boolean, default: false, null: false
  end
end

I changed from boolean to integer type in change_column, but an error occurred because I tried to change to integer while default was false in the complte column.

So delete the false data in the complte column and rails db: migrate: reset

This is a safe solution