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Stuck at (erno: 150 "Foreign key constraint is incorrectly formed,")

Discussão em 'Outras Linguagens' iniciado por Lynelle, Outubro 1, 2024 às 06:52.

  1. Lynelle

    Lynelle Guest

    I'm new to learning Laravel 11, and I'm stuck with the (erno: 150 "Foreign key constraint is incorrectly formed,") and despite trying various suggestions I’ve seen, I still can't resolve it. Could you please help me identify where I went wrong and how to fix it?

    This is the expenses table

    public function up(): void
    {
    Schema::create('expenses', function (Blueprint $table) {

    $table->id();
    $table->increments('category_id');
    $table->foreign('category_id')->references('id')
    ->on(table:'categories')->onDelete('cascade')->onUpdate(action:'cascade');
    $table->decimal('amount',8, 2);
    $table->date('entry_date');
    $table->timestamps();
    $table->engine = 'InnoDB';

    });
    }


    This is the categories table

    public function up(): void
    {
    Schema::create('categories', function (Blueprint $table) {

    $table->increments('id');
    $table->string('category_name');
    $table->string('description')->nullable();
    $table->timestamps();
    });
    }


    I need the foreign key category_id in the expenses table to be connected to the categories table. When I update a category, I want the category_id in the expenses table to also update, and the same goes for deletion. If a specific category_name is deleted, I want the corresponding records in the expenses table to be removed as well.

    Continue reading...

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