rake db:migrate
== 20190928042042 CreatePosts: migrating ======================================
-- create_table(:posts)
-> 0.0422s
== 20190928042042 CreatePosts: migrated (0.0426s) =============================
== 20190928042817 CreateVotes: migrating ======================================
-- create_table(:votes)
`rake aborted!
StandardError: An error has occurred, this and all later migrations canceled:
PG::UndefinedTable: ERROR: relation "users" does not exist`
Solution:
run the single migration first
rake db:migrate:up VERSION=20090408054555
https://riptutorial.com/ruby-on-rails/example/3486/run-specific-migration
then run rake db:migrate
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