Laravel Schema for PostgreSQL Sequence - postgresql

Question

These are my requirements:
I have a table(upload_training_files)
The fields are id, organisation_id(foreign), year_id(foreign), created_by, created_at, updated_by, updated_at, file_path.
The organisation_id field refers to id field of organisations. It should be auto_incremented and also should identify with a sequence table(upload_training_file_organisation_id_fk_seq).
I have failed to do this in Laravel after repeated attempts. This is my schema:
<?php
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;
class CreateUploadTrainingFileTable extends Migration {
public function up()
{
Schema::create('upload_training_file', function(Blueprint $table) {
$table->bigincrements('id');
$table->biginteger('organisation_id_fk')->unsigned()->unique();
$table->foreign('organisation_id_fk')->references('organisation_id')->on('organisations');
$table->biginteger('year_id_fk')->unsigned()->unique();
$table->foreign('year_id_fk')->references('year_id')->on('year_of_performance');
$table->biginteger('created_by')->nullable();
$table->time('created_at')->nullable();
$table->biginteger('updated_by');
$table->time('updated_at')->nullable();
$table->string('file_path')->nullable();
});
}
public function down()
{
Schema::drop('upload_training_file');
}
}
Here's the snapshot of the database table

Answer 1

Solved it. :)
You have to drop the primary keys before assigning every new auto increment field.
<?php
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;
class CreateUploadTrainingFileTable extends Migration {
/**
* Run the migrations.
*
* #return void
*/
public function up()
{
Schema::create('upload_training_file', function(Blueprint $table) {
$table->bigincrements('upload_training_file_id');
});
Schema::table('upload_training_file', function($table)
{
$table->dropPrimary('upload_training_file_upload_training_file_id_primary');
});
Schema::table('upload_training_file', function($table)
{
$table->bigincrements('organisation_id_fk')->unsigned()->after('id');;
$table->foreign('organisation_id_fk')->references('organisation_id')->on('organisation');
});
Schema::table('upload_training_file', function($table)
{
$table->dropPrimary('upload_training_file_organisation_id_fk_primary');
});
Schema::table('upload_training_file', function($table)
{
$table->bigincrements('year_id_fk')->unsigned()->after('organisation_id_fk');;
$table->foreign('year_id_fk')->references('year_id')->on('year_of_performance');
$table->biginteger('created_by')->nullable();
$table->time('create_date')->nullable();
$table->biginteger('updated_by')->nullable;
$table->time('update_date')->nullable();
$table->string('file_path')->nullable();
});
Schema::table('upload_training_file', function($table)
{
$table->dropPrimary('upload_training_file_year_id_fk_primary');
$table->primary('upload_training_file_id');
});
}
/**
* Reverse the migrations.
*
* #return void
*/
public function down()
{
Schema::drop('upload_training_file');
}
}