SQLite3::ConstraintException：FOREIGN KEY 约束失败：DROP TABLE 用户

Question

如何在 DROP TABLE 之前禁用（我还不知道正确的术语）外键？或者

删除 table 的正确方法？

遵循提供的步骤here

Image link

再次遇到同样的错误SQLite3::ConstraintException: FOREIGN KEY constraint failed: DROP TABLE users.

(byebug) execute "PRAGMA foreign_keys = OFF"
-- execute("PRAGMA foreign_keys = OFF")
   -> 0.0009s
[]
(byebug) execute "DROP TABLE users"
-- execute("DROP TABLE users")
*** ActiveRecord::InvalidForeignKey Exception: SQLite3::ConstraintException: FOREIGN KEY constraint failed: DROP TABLE users

nil

Answer 1

假设您的用户与帖子相关联 table 然后创建迁移并删除

class RemoveForeignKey < ActiveRecord::Migration
  def change
    # remove the old foreign_key
    remove_foreign_key :posts, :users
  end
end

SQLite3::ConstraintException：FOREIGN KEY 约束失败：DROP TABLE 用户

SQLite3::ConstraintException: FOREIGN KEY constraint failed: DROP TABLE users

sqlite

ruby-on-rails

drop-table

sqlite3-ruby