May 21, 2014. Update your migration to conditionally execute if the table does not already exist class MyMigration < ActiveRecord::Migration def change.
As always, huge thanks to the many contributors who helped with this release. Rails 4.2.9 has been released. Posted by rafaelfranca, June 26, 2017 @ 5:31 pm in.
Nov 29, 2014. You are deleting the migration, in rails. However the actual mysql table itself it not being touched (dropped) and then most of your problems are.
Ten Common Database Design Mistakes – Simple Talk – How many rows are there in this table? Well, there seem to be three, but are rows with PartIDs 1 and 2 actually the same row, duplicated? Or are they two different.
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Jul 18, 2013. The reason you are seeing that message is because the table already exists. rake db:migrate doesn't drop the table. Basically it runs the.
Oct 24, 2011. add drop_table :users right before create_table :users and run rake db:migrate. It will remove the users table before recreating it. You can.
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Jul 29, 2014. The table already exists. Either drop the table rails g migration DropSdkWizardSession. and enter the following code in the created migration