Laravel migration can't create foreign key

问题

I'm trying to create a foreign key, artisan does not show me any errors, just does not create my foreign key, it's probably my code:

1° table:

Schema::create('cooperados', function (Blueprint $table) {
        $table->bigIncrements('id');
        $table->timestamps();
        $table->string('nameCoop', 255);
        $table->integer('numCoop');
        $table->string('cpfCoop', 11);
        $table->date('dtCad');
        $table->date('dtDem')->nullable();
        $table->text('description')->nullable();
        $table->decimal('subscritas', 6, 2);
        $table->decimal('integralizadas', 6,2)->nullable();
        $table->decimal('aintegralizar', 6,2)->nullable();
        $table->enum('status', ['ativo','inativo'])->default('ativo');
    });

the foreign key table

public function up()
    {
        Schema::create('mov', function (Blueprint $table) {
            $table->bigIncrements('idMov');
            $table->timestamps();
            $table->integer('id_coop')->unsigned;
            $table->foreign('id_coop')->references('id')->on('cooperados');
            $table->decimal('valor', 6, 2);
        });
    }

回答1:

Change your code from

$table->integer('id_coop')->unsigned;
$table->foreign('id_coop')->references('id')->on('cooperados');

To:

$table->unsignedBigInteger('id_coop')->index();
$table->foreign('id_coop')->references('id')->on('cooperados')->onDelete('cascade');

Or you can also use below code

 $table->integer('id_coop')->unsigned()->index();
 $table->foreign('id_coop')->references('id')->on('cooperados')->onDelete('cascade');

Or also you can use below

$table->bigInteger('id_coop')->unsigned()->index();
$table->foreign('id_coop')->references('id')->on('cooperados')->onDelete('cascade');

来源：https://stackoverflow.com/questions/56395229/laravel-migration-cant-create-foreign-key

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php

mysql

sql

laravel

artisan