Question

目前我的关系船舶是：

      $table->integer('facility_id')->unsigned()->nullable();
      $table->foreign('facility_id')->references('id')->on('facility')->onDelete('cascade');

这是在设施表上，现在我想在新迁移中更改表，我要删除fk并在新表中添加fk

          $table->dropForeign(['facility_id']);
        $table->foreign('facility_id')->references('facility_locations_id')->on('facility_locations')->onDelete('cascade');

我只是更改表名，但显示为

              annot add or update a child row: a foreign key constraint 
    fails (`ovadaclinic_fd_dev`.`#sql-7d54_31`, CONSTRAINT 
   `user_facility_facility_id_fore  
      ign` FOREIGN KEY (`facility_id`) REFERENCES `facility_locations` 
     (`facility_locations_id`) ON DELETE CASCADE) (SQL: alter table 
    `user_facility` add constraint `user_facility_facility_id_foreign` fore  
    ign key (`facility_id`) references `facility_locations` 
 (`facility_locations_id`) on delete cascade)

我该如何解决这个问题？非常感谢您的帮助

如何在新迁移中更改外键关系-在Laravel中

0 个答案: