相关疑难解决方法(0)

当我运行rake db:migrate时,我得到以下输出:

== 20141219011612 CreatePost:迁移======================================= - create_table("帖子")耙子流产!StandardError:发生错误,此以及所有后续迁移都已取消:== 20141219011612 Postposts:migration ============================== ========= - create_table("posts")rake aborted!StandardError:发生错误,此以及所有后续迁移都已取消:

PG :: DuplicateTable:错误:关系"posts"已经存在:CREATE TABLE"posts"("id"串行主键,"post"文本,"release_date"时间戳,"created_at"时间戳,"updated_at"时间戳)/ home/admin/.rvm/gems/ruby​​-2.1.5/gems/activerecord-4.1.8/lib/active_record/connection_adapters/postgresql/database_statements.rb:128:async_exec' /home/admin/.rvm/gems/ruby-2.1.5/gems/activerecord-4.1.8/lib/active_record/connection_adapters/postgresql/database_statements.rb:128:in 在执行'/home/admin/.rvm/gems/ 中的 块中ruby-2.1.5/gems/activerecord-4.1.8/lib/active_record/connection_adapters/abstract_adapter.rb:373:in block in log' /home/admin/.rvm/gems/ruby-2.1.5/gems/activesupport-4.1.8/lib/active_support/notifications/instrumenter.rb:20:in instrument' /home/admin/.rvm/gems/ruby-2.1.5/gems/activerecord-4.1 .8/lib/active_record/connection_adapters/abstract_adapter.rb:367:log' /home/admin/.rvm/gems/ruby-2.1.5/gems/activerecord-4.1.8/lib/active_record/connection_adapters/postgresql/database_statements.rb:127:in 执行'/home/admin/.rvm/gems/ruby-2.1.5/gems/activerecord-4.1.8/lib/active_record/connection_adapters/abstract/ schema_statements.rb:205:在create_table' /home/admin/.rvm/gems/ruby-2.1.5/gems/activerecord-4.1.8/lib/active_record/migration.rb:649:in method_missing block in say_with_time' /home/admin/.rvm/gems/ruby-2.1.5/gems/activerecord-4.1.8/lib/active_record/migration.rb:621:in '/home/admin/.rvm/gems/ruby-2.1.5/gems/activerecord-4.1.8/lib/active_record/ migration.rb:621:in say_with_time'/ home 中的 块中 /admin/.rvm/gems/ruby-2.1.5/gems/activerecord-4.1.8/lib/active_record/migration.rb:641:in method_missing' /home/admin/Desktop/postr/db/migrate/20141219011612_post_posts.rb:3:in up'/ home/admin/.rvm/gem s/ruby​​-2.1.5/gems/activerecord-4.1.8/lib/active_record/migration.rb:598:在迁移中的exec_migration' /home/admin/.rvm/gems/ruby-2.1.5/gems/activerecord-4.1.8/lib/active_record/migration.rb:579:in 块(2级)' /home/admin/.rvm/gems/ruby-2.1.5 /gems/activerecord-4.1.8/lib/active_record/migration.rb:578:in block in migrate' /home/admin/.rvm/gems/ruby-2.1.5/gems/activerecord-4.1.8/lib/active_record/connection_adapters/abstract/connection_pool.rb:294:in with_connection'/ home/ admin/ .rvm/ gems/ ruby- 2.1.5/ gems/ activerecord- 4.1.8/ lib/active_record/ migration.rb:577:在ddl_transaction'/ home 中 migrate' /home/admin/.rvm/gems/ruby-2.1.5/gems/activerecord-4.1.8/lib/active_record/migration.rb:752:in 迁移'/home/admin/.rvm/gems/ruby-2.1.5/gems/activerecord-4.1.8/lib/active_record/migration.rb:991:in …