質問編集履歴
2
修正
test
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File without changes
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test
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@@ -14,9 +14,11 @@
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1回目にrake db:migrateをした時のエラー
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```terminal
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-
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$ rake db:migrate
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== 20200721090023 CreateRelationships: migrating ==============================
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@@ -66,6 +68,60 @@
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terminalでrails sをした時に、'bin/rake db:migrate RAILS_ENV=development'が表示され、打ち込むとこのエラーが表示されました。
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72
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73
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```terminal
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$ bin/rake db:migrate RAILS_ENV=development
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Running via Spring preloader in process 61687
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== 20200721090023 CreateRelationships: migrating ==============================
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-- create_table(:relationships)
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rake aborted!
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StandardError: An error has occurred, all later migrations canceled:
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Mysql2::Error: Table 'relationships' already exists: CREATE TABLE `relationships` (`id` int(11) auto_increment PRIMARY KEY, `user_id` int(11), `follow_id` int(11), `created_at` datetime NOT NULL, `updated_at` datetime NOT NULL) ENGINE=InnoDB
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/Users/hiroshi/wa/db/migrate/20200721090023_create_relationships.rb:3:in `change'
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-e:1:in `<main>'
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Caused by:
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ActiveRecord::StatementInvalid: Mysql2::Error: Table 'relationships' already exists: CREATE TABLE `relationships` (`id` int(11) auto_increment PRIMARY KEY, `user_id` int(11), `follow_id` int(11), `created_at` datetime NOT NULL, `updated_at` datetime NOT NULL) ENGINE=InnoDB
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/Users/hiroshi/wa/db/migrate/20200721090023_create_relationships.rb:3:in `change'
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-e:1:in `<main>'
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Caused by:
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Mysql2::Error: Table 'relationships' already exists
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/Users/hiroshi/wa/db/migrate/20200721090023_create_relationships.rb:3:in `change'
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-e:1:in `<main>'
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Tasks: TOP => db:migrate
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(See full trace by running task with --trace)
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```
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```db
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class CreateRelationships < ActiveRecord::Migration
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1
修正
test
CHANGED
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File without changes
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test
CHANGED
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@@ -14,7 +14,55 @@
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```terminal
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ishiwatshinoAir:wa hiroshi$ rake db:migrate
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== 20200721090023 CreateRelationships: migrating ==============================
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-- create_table(:relationships)
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rake aborted!
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StandardError: An error has occurred, all later migrations canceled:
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Mysql2::Error: Cannot add foreign key constraint: ALTER TABLE `relationships` ADD CONSTRAINT `fk_rails_be1f05b3d7`
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FOREIGN KEY (`follow_id`)
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REFERENCES `follows` (`id`)
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/Users/hiroshi/wa/db/migrate/20200721090023_create_relationships.rb:3:in `change'
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Caused by:
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ActiveRecord::StatementInvalid: Mysql2::Error: Cannot add foreign key constraint: ALTER TABLE `relationships` ADD CONSTRAINT `fk_rails_be1f05b3d7`
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FOREIGN KEY (`follow_id`)
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REFERENCES `follows` (`id`)
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/Users/hiroshi/wa/db/migrate/20200721090023_create_relationships.rb:3:in `change'
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Caused by:
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Mysql2::Error: Cannot add foreign key constraint
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/Users/hiroshi/wa/db/migrate/20200721090023_create_relationships.rb:3:in `change'
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Tasks: TOP => db:migrate
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(See full trace by running task with --trace)
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```
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