I am trying to create a new table where 2 foreign key will be set
public function up() { Schema::create('role_permissions_link', function (Blueprint $table) { $table->id(); $table->integer('permissions_id')->unsigned(); $table->integer('users_role_id')->unsigned(); $table->timestamps(); $table->index(['permissions_id', 'users_role_id']); }); Schema::table('role_permissions_link', function (Blueprint $table) { $table->foreign('permissions_id')->references('id')->on('permissions'); $table->foreign('users_role_id')->references('id')->on('users_role'); }); }
I keep getting an error saying
SQLSTATE[HY000]: General error: 1005 Can't create table `homestead`.`ja_role_permissions_link` (errno: 150 "Foreign key constraint is incorrectly formed") (SQL: alter table `ja_role_permissions_link` add constraint `ja_role_permissions_link_permissions_id_foreign` foreign key (`permissions_id`) references `ja_permissions` (`id`)) at vendor/laravel/framework/src/Illuminate/Database/Connection.php:669 665| // If an exception occurs when attempting to run a query, we'll format the error 666| // message to include the bindings with SQL, which will make this exception a 667| // lot more helpful to the developer instead of just the database's errors. 668| catch (Exception $e) { > 669| throw new QueryException( 670| $query, $this->prepareBindings($bindings), $e 671| ); 672| } 673| +9 vendor frames 10 database/migrations/2020_04_06_144324_create_role_permissions_link_table.php:27 IlluminateSupportFacadesFacade::__callStatic() +34 vendor frames 45 artisan:37 IlluminateFoundationConsoleKernel::handle()
I have tried moving the code around and some online solutions but keep getting the same error.
permission migration file
public function up() { Schema::create('permissions', function (Blueprint $table) { $table->id(); $table->string('name'); $table->timestamps(); $table->index(['id']); }); }
users_role migration file
public function up() { Schema::create('users_role', function (Blueprint $table) { $table->id(); $table->string('name'); $table->timestamps(); $table->index(['id']); }); }
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Answer
Solution 1 – Data Types ~(Not this time!)~~
Something to check would be that the datatypes of your columns and keys match.
It is not uncommon to see this error if the foreign key (i.e. $table->integer('permissions_id')->unsigned();
) on one table does not match the id on the other table ($table->bigIncrements('id');
)
Solution 2 – Migration Order (Correct)
permissions
should be before role_permissions
. You may need to rename the migrations slightly as they will run in date order based off of their names.