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For MySQL, foreign keys are dependent on index.

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This commit is contained in:
Andreas Brandl 2018-03-01 17:25:05 +01:00
parent 43b74afd86
commit 8a7cd25d08
2 changed files with 6 additions and 3 deletions
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3
db/migrate/20180223120443_create_user_interacted_projects_table.rb
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@ -10,9 +10,6 @@ class CreateUserInteractedProjectsTable < ActiveRecord::Migration
t.references :user, null: false
t.references :project, null: false
end
add_concurrent_foreign_key :user_interacted_projects, :users, column: :user_id, on_delete: :cascade
add_concurrent_foreign_key :user_interacted_projects, :projects, column: :project_id, on_delete: :cascade
end
def down

6
db/post_migrate/20180223124427_build_user_interacted_projects_table.rb
View file

@ -14,11 +14,17 @@ class BuildUserInteractedProjectsTable < ActiveRecord::Migration
end.up
add_concurrent_index :user_interacted_projects, [:project_id, :user_id], unique: true
add_concurrent_foreign_key :user_interacted_projects, :users, column: :user_id, on_delete: :cascade
add_concurrent_foreign_key :user_interacted_projects, :projects, column: :project_id, on_delete: :cascade
end
def down
execute "TRUNCATE user_interacted_projects"
remove_foreign_key :user_interacted_projects, :users
remove_foreign_key :user_interacted_projects, :projects
remove_concurrent_index_by_name :user_interacted_projects, 'index_user_interacted_projects_on_project_id_and_user_id'
end