dongwu8653 2018-09-26 08:25
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在Laravel上我得到错误错误:150“外键约束不正确”

I'm new to Laravel, and I'm having issues with Migrations.

The table name spellings are accurate but I still get the error.

The error states

SQLSTATE[HY000]: General error: 1005 Can't create table first_db.#sql-41c_2f (errno: 150 "Foreign key constraint is incorrectly formed") (SQL: alter table fees add constraint fees_academic_id_foreign foreign key (academic_id) references academics (academic_id))

The error points to this file below:

Schema::create('fees', function (Blueprint $table) {
    $table->increments('fee_id');
    $table->integer('academic_id')->unsigned;
    $table->integer('level_id')->unsigned;
    $table->integer('fee_type_id')->unsigned;
    $table->string('fee_heading',200)->nullable;
    $table->float('amount', 8, 2);
    $table->foreign('academic_id')->references('academic_id')->on('academics');
    $table->foreign('level_id')->references('level_id')->on('levels');
    $table->foreign('fee_type_id')->references('fee_type_id')->on('feestype');
});

Is there something I'm doing wrong?

  • 写回答

2条回答 默认 最新

  • douchen5971 2018-09-26 08:36
    关注

    unsigned should be a function :

    $table->integer('academic_id')->unsigned();
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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