I am trying to run the following migration:
public function up()
{
Schema::create('lifestyle_questions', function(Blueprint $table)
{
$table->increments('id');
$table->string('question');
$table->timestamps();
});
Schema::create('lifestyle_question_answers', function(Blueprint $table)
{
$table->increments('id');
$table->integer('lifestyle_question_id')->unsigned();
$table->foreign('lifestyle_question_id')->references('id')->on('lifestyle_questions');
$table->string('answer');
$table->timestamps();
});
Schema::create('user_lifestyle_question_answers', function(Blueprint $table)
{
$table->integer('user_id')->unsigned();
$table->foreign('user_id')->references('id')->on('users');
$table->integer('lifestyle_question_answer_id')->unsigned();
$table->foreign('lifestyle_question_answer_id')->references('id')->on('lifestyle_question_answers');
});
}
But I get the following error:
[Illuminate\Database\QueryException]
SQLSTATE[42000]: Syntax error or access violation: 1059 Identifier name 'user_lifestyle_question_answers_lifestyle_question_answer_id_foreign' is too long (SQL: alter table `user_lifestyle_question_answers` add constraint user_lifestyle_question_answers_lifestyle_question_answer_id_foreign foreign key (`lifestyle_question_answer_id`) references `lifestyle_question_answers` (`id`))
[PDOException]
SQLSTATE[42000]: Syntax error or access violation: 1059 Identifier name 'user_lifestyle_question_answers_lifestyle_question_answer_id_foreign' is too long
C
Chuck Le Butt
You can pass a custom index name as the second parameter into the foreign() method. Or just use shorter table/column names.
So you want to do something like:
public function up()
{
Schema::create('lifestyle_questions', function(Blueprint $table)
{
$table->increments('id');
$table->string('question');
$table->timestamps();
});
Schema::create('lifestyle_question_answers', function(Blueprint $table)
{
$table->increments('id');
$table->integer('lifestyle_question_id')->unsigned();
$table->foreign('lifestyle_question_id', 'lq_id_foreign')->references('id')->on('lifestyle_questions');
$table->string('answer');
$table->timestamps();
});
Schema::create('user_lifestyle_question_answers', function(Blueprint $table)
{
$table->integer('user_id')->unsigned();
$table->foreign('user_id')->references('id')->on('users');
$table->integer('lifestyle_question_answer_id')->unsigned();
$table->foreign('lifestyle_question_answer_id', 'lqa_id_foreign')->references('id')->on('lifestyle_question_answers');
});
}
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primary()mehtod when generating composite keys:$table->primary(['id1', 'id'], 'custom_index');How to solve this issue?foreignIdyou can use it like so:$table->foreignId('really_long_foreign_key_id')->constrained()->index('short_id_foreign');